Keys - Machine - Carbon Steel– Page6 – Miniature Bearings Australia - MBA Minibearings - Online, Pick-Up, Retail, Distributors, Wholesale

Width (W)	Height (h)	Length (L)	Indicative Image
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 12.00 mm _{+/ - 0.25} (Equiv. 0.472 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Standard Undersized End Type: B (Square Ends) Additional stock available from USA subject to Prior Sale = 150
Part Number: K-0400-0400-1200B-C (5 Pcs) Machine Keys - 4x4x12 mm - Carbon Steel C45 Key Out of Stock \| Backorder Now \| Orders can be expected around Sun, Dec 07, 2025 Regular price $10.86 AUD Regular price ~~$13.04 AUD~~ Sale price $10.86 AUD Unit price per 5 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required Backorder: Out of Stock.
Width (W)	Height (h)	Length (L)	Indicative Image
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 12.00 mm _{+/ - 0.25} (Equiv. 0.472 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Standard Undersized End Type: B (Square Ends) Additional stock available from USA subject to Prior Sale = 150
Part Number: K-0400-0400-1200B-C (5 Pcs) Machine Keys - 4x4x12 mm - Carbon Steel C45 Key Out of Stock \| Backorder Now \| Orders can be expected around Sun, Dec 07, 2025 Regular price $10.86 AUD Regular price ~~$13.04 AUD~~ Sale price $10.86 AUD Unit price per 5 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required Backorder: Out of Stock.
K-0400-0400-1200B-C (5 Pcs) --- Machine Keys - 4x4x12 mm - Carbon Steel C45 Key Sale K-0400-0400-1200B-C (5 Pcs) --- Machine Keys - 4x4x12 mm - Carbon Steel C45 Key Regular price $10.86 AUD Regular price ~~$13.04 AUD~~ Sale price $10.86 AUD Unit price per 5 Per Sell Unit Excludes GST and overseas Taxes & Duties Out of stock! Backorder Now Sale
Width (W) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Length (L) 12.00 mm _{+/ - 0.25} (Equiv. 0.472 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Oversized End Type: B (Square Ends)
Part Number: K-0400-0400-1200BO-C Machine Keys - 4x4x12 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity
Width (W) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Length (L) 12.00 mm _{+/ - 0.25} (Equiv. 0.472 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Oversized End Type: B (Square Ends)
Part Number: K-0400-0400-1200BO-C Machine Keys - 4x4x12 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity \| Orders can be expected around Wed, Jul 26, 2028
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 12.00 mm _{+/ - 0.25} (Equiv. 0.472 in.)
Material: Carbon Steel Finish: Plain Tolerance Type: Standard Undersized End Type: A (Rounded Ends) Additional stock available from USA subject to Prior Sale = 97257
Part Number: K-0400-0400-1200A-C (50 Pcs) Machine Keys - 4x4x12 mm - Carbon Steel Key Out of Stock \| Backorder Now \| Orders can be expected around Fri, Nov 28, 2025 Regular price $19.32 AUD Regular price ~~$23.18 AUD~~ Sale price $19.32 AUD Unit price per 50 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required Backorder: Out of Stock.
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 12.00 mm _{+/ - 0.25} (Equiv. 0.472 in.)
Material: Carbon Steel Finish: Plain Tolerance Type: Standard Undersized End Type: A (Rounded Ends) Additional stock available from USA subject to Prior Sale = 97257
Part Number: K-0400-0400-1200A-C (50 Pcs) Machine Keys - 4x4x12 mm - Carbon Steel Key Out of Stock \| Backorder Now \| Orders can be expected around Fri, Nov 28, 2025 Regular price $19.32 AUD Regular price ~~$23.18 AUD~~ Sale price $19.32 AUD Unit price per 50 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required Backorder: Out of Stock.
K-0400-0400-1200A-C (50 Pcs) --- Machine Keys - 4x4x12 mm - Carbon Steel Key Sale K-0400-0400-1200A-C (50 Pcs) --- Machine Keys - 4x4x12 mm - Carbon Steel Key Regular price $19.32 AUD Regular price ~~$23.18 AUD~~ Sale price $19.32 AUD Unit price per 50 Per Sell Unit Excludes GST and overseas Taxes & Duties Out of stock! Backorder Now Sale
Width (W) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Length (L) 14.00 mm _{+/ - 0.25} (Equiv. 0.551 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Oversized End Type: A (Rounded Ends)
Part Number: K-0400-0400-1400AO-C Machine Keys - 4x4x14 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity
Width (W) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Length (L) 14.00 mm _{+/ - 0.25} (Equiv. 0.551 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Oversized End Type: A (Rounded Ends)
Part Number: K-0400-0400-1400AO-C Machine Keys - 4x4x14 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity \| Orders can be expected around Wed, Jul 26, 2028
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 14.00 mm _{+/ - 0.25} (Equiv. 0.551 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Standard End Type: B (Square Ends) Additional stock available from USA subject to Prior Sale = 1193
Part Number: K-0400-0400-1400B-C (600 Pcs) Machine Keys - 4x4x14 mm - Carbon Steel C45 Key Out of Stock \| Backorder Now \| Orders can be expected around Fri, Nov 28, 2025 Regular price $135.77 AUD Regular price ~~$162.93 AUD~~ Sale price $135.77 AUD Unit price per 600 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required Backorder: Out of Stock.
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 14.00 mm _{+/ - 0.25} (Equiv. 0.551 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Standard End Type: B (Square Ends) Additional stock available from USA subject to Prior Sale = 1193
Part Number: K-0400-0400-1400B-C (600 Pcs) Machine Keys - 4x4x14 mm - Carbon Steel C45 Key Out of Stock \| Backorder Now \| Orders can be expected around Fri, Nov 28, 2025 Regular price $135.77 AUD Regular price ~~$162.93 AUD~~ Sale price $135.77 AUD Unit price per 600 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required Backorder: Out of Stock.
K-0400-0400-1400B-C (600 Pcs) --- Machine Keys - 4x4x14 mm - Carbon Steel C45 Key Sale K-0400-0400-1400B-C (600 Pcs) --- Machine Keys - 4x4x14 mm - Carbon Steel C45 Key Regular price $135.77 AUD Regular price ~~$162.93 AUD~~ Sale price $135.77 AUD Unit price per 600 Per Sell Unit Excludes GST and overseas Taxes & Duties Out of stock! Backorder Now Sale
Width (W) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Length (L) 14.00 mm _{+/ - 0.25} (Equiv. 0.551 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Oversized End Type: B (Square Ends)
Part Number: K-0400-0400-1400BO-C Machine Keys - 4x4x14 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity
Width (W) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Length (L) 14.00 mm _{+/ - 0.25} (Equiv. 0.551 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Oversized End Type: B (Square Ends)
Part Number: K-0400-0400-1400BO-C Machine Keys - 4x4x14 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity \| Orders can be expected around Wed, Jul 26, 2028
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 14.00 mm _{+/ - 0.25} (Equiv. 0.551 in.)
Material: Carbon Steel Finish: Plain Tolerance Type: Standard Undersized End Type: A (Rounded Ends) Additional stock available from USA subject to Prior Sale = 2737
Part Number: K-0400-0400-1400A-C (5 Pcs) Machine Keys - 4x4x14 mm - Carbon Steel Key 39 units (195 pcs) Available Now \| Further orders can be expected around Fri, Nov 28, 2025 Regular price $3.41 AUD Regular price Sale price $3.41 AUD Unit price per 5 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required 39 units (195 pcs) Available Now. Backorder if more than 39.
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 14.00 mm _{+/ - 0.25} (Equiv. 0.551 in.)
Material: Carbon Steel Finish: Plain Tolerance Type: Standard Undersized End Type: A (Rounded Ends) Additional stock available from USA subject to Prior Sale = 2737
Part Number: K-0400-0400-1400A-C (5 Pcs) Machine Keys - 4x4x14 mm - Carbon Steel Key 39 units (195 pcs) Available Now \| Further orders can be expected around Fri, Nov 28, 2025 Regular price $3.41 AUD Regular price Sale price $3.41 AUD Unit price per 5 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required 39 units (195 pcs) Available Now. Backorder if more than 39.
K-0400-0400-1400A-C (5 Pcs) --- Machine Keys - 4x4x14 mm - Carbon Steel Key K-0400-0400-1400A-C (5 Pcs) --- Machine Keys - 4x4x14 mm - Carbon Steel Key Regular price $3.41 AUD Regular price Sale price $3.41 AUD Unit price per 5 Per Sell Unit Excludes GST and overseas Taxes & Duties 39 Available Now
Width (W) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Length (L) 15.00 mm _{+/ - 0.25} (Equiv. 0.591 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Oversized End Type: A (Rounded Ends)
Part Number: K-0400-0400-1500AO-C Machine Keys - 4x4x15 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity
Width (W) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Length (L) 15.00 mm _{+/ - 0.25} (Equiv. 0.591 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Oversized End Type: A (Rounded Ends)
Part Number: K-0400-0400-1500AO-C Machine Keys - 4x4x15 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity \| Orders can be expected around Wed, Jul 26, 2028
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 15.00 mm _{+/ - 0.25} (Equiv. 0.591 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Standard Undersized End Type: B (Square Ends)
Part Number: K-0400-0400-1500B-C Machine Keys - 4x4x15 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 15.00 mm _{+/ - 0.25} (Equiv. 0.591 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Standard Undersized End Type: B (Square Ends)
Part Number: K-0400-0400-1500B-C Machine Keys - 4x4x15 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity \| Orders can be expected around Wed, Jul 26, 2028
Width (W) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Length (L) 15.00 mm _{+/ - 0.25} (Equiv. 0.591 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Oversized End Type: B (Square Ends)
Part Number: K-0400-0400-1500BO-C Machine Keys - 4x4x15 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity
Width (W) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Length (L) 15.00 mm _{+/ - 0.25} (Equiv. 0.591 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Oversized End Type: B (Square Ends)
Part Number: K-0400-0400-1500BO-C Machine Keys - 4x4x15 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity \| Orders can be expected around Wed, Jul 26, 2028
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 15.00 mm _{+/ - 0.25} (Equiv. 0.591 in.)
Material: Carbon Steel Finish: Plain Tolerance Type: Standard Undersized End Type: A (Rounded Ends)
Part Number: K-0400-0400-1500A-C (375 Pcs) Machine Keys - 4x4x15 mm - Carbon Steel Key Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jan 27, 2026 Regular price $388.77 AUD Regular price Sale price $388.77 AUD Unit price per 375 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required Backorder: Out of Stock.
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 15.00 mm _{+/ - 0.25} (Equiv. 0.591 in.)
Material: Carbon Steel Finish: Plain Tolerance Type: Standard Undersized End Type: A (Rounded Ends)
Part Number: K-0400-0400-1500A-C (375 Pcs) Machine Keys - 4x4x15 mm - Carbon Steel Key Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jan 27, 2026 Regular price $388.77 AUD Regular price Sale price $388.77 AUD Unit price per 375 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required Backorder: Out of Stock.
K-0400-0400-1500A-C (375 Pcs) --- Machine Keys - 4x4x15 mm - Carbon Steel Key K-0400-0400-1500A-C (375 Pcs) --- Machine Keys - 4x4x15 mm - Carbon Steel Key Regular price $388.77 AUD Regular price Sale price $388.77 AUD Unit price per 375 Per Sell Unit Excludes GST and overseas Taxes & Duties Out of stock! Backorder Now
Width (W) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Length (L) 16.00 mm _{+/ - 0.25} (Equiv. 0.63 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Oversized End Type: A (Rounded Ends)
Part Number: K-0400-0400-1600AO-C Machine Keys - 4x4x16 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity
Width (W) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Length (L) 16.00 mm _{+/ - 0.25} (Equiv. 0.63 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Oversized End Type: A (Rounded Ends)
Part Number: K-0400-0400-1600AO-C Machine Keys - 4x4x16 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity \| Orders can be expected around Wed, Jul 26, 2028
Width (W) 4.00 mm (Equiv. 0.157 in.)	Height (h) 4.00 mm (Equiv. 0.157 in.)	Length (L) 16.00 mm (Equiv. 0.63 in.)
Material: Carbon Steel Finish: Plain Tolerance Type: Standard End Type: AB (1 end rounded, other end square)
Part Number: K-0400-0400-1600AB-C Machine Keys - 4x4x16 mm - Carbon Steel Key Out of Stock \| Backorder Now \| Orders can be expected around Sun, Dec 07, 2025 Regular price $1.41 AUD Regular price ~~$1.69 AUD~~ Sale price $1.41 AUD Unit price per Each Excludes GST and overseas Taxes & Duties Quantity Required Backorder: Out of Stock.
Width (W) 4.00 mm (Equiv. 0.157 in.)	Height (h) 4.00 mm (Equiv. 0.157 in.)	Length (L) 16.00 mm (Equiv. 0.63 in.)
Material: Carbon Steel Finish: Plain Tolerance Type: Standard End Type: AB (1 end rounded, other end square)
Part Number: K-0400-0400-1600AB-C Machine Keys - 4x4x16 mm - Carbon Steel Key Out of Stock \| Backorder Now \| Orders can be expected around Sun, Dec 07, 2025 Regular price $1.41 AUD Regular price ~~$1.69 AUD~~ Sale price $1.41 AUD Unit price per Each Excludes GST and overseas Taxes & Duties Quantity Required Backorder: Out of Stock.
K-0400-0400-1600AB-C --- Machine Keys - 4x4x16 mm - Carbon Steel Key Sale K-0400-0400-1600AB-C --- Machine Keys - 4x4x16 mm - Carbon Steel Key Regular price $1.41 AUD Regular price ~~$1.69 AUD~~ Sale price $1.41 AUD Unit price per Each Excludes GST and overseas Taxes & Duties Out of stock! Backorder Now Sale
Width (W) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Length (L) 16.00 mm _{+/ - 0.25} (Equiv. 0.63 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Oversized End Type: B (Square Ends)
Part Number: K-0400-0400-1600BO-C Machine Keys - 4x4x16 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity
Width (W) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Length (L) 16.00 mm _{+/ - 0.25} (Equiv. 0.63 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Oversized End Type: B (Square Ends)
Part Number: K-0400-0400-1600BO-C Machine Keys - 4x4x16 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity \| Orders can be expected around Wed, Jul 26, 2028
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 16.00 mm _{+/ - 0.25} (Equiv. 0.63 in.)
Material: Carbon Steel Finish: Plain Tolerance Type: Standard Undersized End Type: A (Rounded Ends) Additional stock available from USA subject to Prior Sale = 7500
Part Number: K-0400-0400-1600A-C (10 Pcs) Machine Keys - 4x4x16 mm - Carbon Steel Key 46 units (460 pcs) Available Now \| Further orders can be expected around Fri, Nov 28, 2025 Regular price $6.14 AUD Regular price Sale price $6.14 AUD Unit price per 10 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required 46 units (460 pcs) Available Now. Backorder if more than 46.
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 16.00 mm _{+/ - 0.25} (Equiv. 0.63 in.)
Material: Carbon Steel Finish: Plain Tolerance Type: Standard Undersized End Type: A (Rounded Ends) Additional stock available from USA subject to Prior Sale = 7500
Part Number: K-0400-0400-1600A-C (10 Pcs) Machine Keys - 4x4x16 mm - Carbon Steel Key 46 units (460 pcs) Available Now \| Further orders can be expected around Fri, Nov 28, 2025 Regular price $6.14 AUD Regular price Sale price $6.14 AUD Unit price per 10 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required 46 units (460 pcs) Available Now. Backorder if more than 46.
K-0400-0400-1600A-C (10 Pcs) --- Machine Keys - 4x4x16 mm - Carbon Steel Key K-0400-0400-1600A-C (10 Pcs) --- Machine Keys - 4x4x16 mm - Carbon Steel Key Regular price $6.14 AUD Regular price Sale price $6.14 AUD Unit price per 10 Per Sell Unit Excludes GST and overseas Taxes & Duties 46 Available Now
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 16.00 mm _{+/ - 0.25} (Equiv. 0.63 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Standard End Type: B (Square Ends) Additional stock available from USA subject to Prior Sale = 1543
Part Number: K-0400-0400-1600B-C (100 Pcs) Machine Keys - 4x4x16 mm - Carbon Steel C45 Key Out of Stock \| Backorder Now \| Orders can be expected around Fri, Nov 28, 2025 Regular price $25.14 AUD Regular price ~~$30.16 AUD~~ Sale price $25.14 AUD Unit price per 100 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required Backorder: Out of Stock.
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 16.00 mm _{+/ - 0.25} (Equiv. 0.63 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Standard End Type: B (Square Ends) Additional stock available from USA subject to Prior Sale = 1543
Part Number: K-0400-0400-1600B-C (100 Pcs) Machine Keys - 4x4x16 mm - Carbon Steel C45 Key Out of Stock \| Backorder Now \| Orders can be expected around Fri, Nov 28, 2025 Regular price $25.14 AUD Regular price ~~$30.16 AUD~~ Sale price $25.14 AUD Unit price per 100 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required Backorder: Out of Stock.
K-0400-0400-1600B-C (100 Pcs) --- Machine Keys - 4x4x16 mm - Carbon Steel C45 Key Sale K-0400-0400-1600B-C (100 Pcs) --- Machine Keys - 4x4x16 mm - Carbon Steel C45 Key Regular price $25.14 AUD Regular price ~~$30.16 AUD~~ Sale price $25.14 AUD Unit price per 100 Per Sell Unit Excludes GST and overseas Taxes & Duties Out of stock! Backorder Now Sale
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 18.00 mm _{+/ - 0.25} (Equiv. 0.709 in.)
Material: Carbon Steel Finish: Plain Tolerance Type: Standard Undersized End Type: A (Rounded Ends) Additional stock available from USA subject to Prior Sale = 1958
Part Number: K-0400-0400-1800A-C (50 Pcs) Machine Keys - 4x4x18 mm - Carbon Steel Key Out of Stock \| Backorder Now \| Orders can be expected around Fri, Nov 28, 2025 Regular price $29.77 AUD Regular price ~~$35.73 AUD~~ Sale price $29.77 AUD Unit price per 50 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required Backorder: Out of Stock.
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 18.00 mm _{+/ - 0.25} (Equiv. 0.709 in.)
Material: Carbon Steel Finish: Plain Tolerance Type: Standard Undersized End Type: A (Rounded Ends) Additional stock available from USA subject to Prior Sale = 1958
Part Number: K-0400-0400-1800A-C (50 Pcs) Machine Keys - 4x4x18 mm - Carbon Steel Key Out of Stock \| Backorder Now \| Orders can be expected around Fri, Nov 28, 2025 Regular price $29.77 AUD Regular price ~~$35.73 AUD~~ Sale price $29.77 AUD Unit price per 50 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required Backorder: Out of Stock.
K-0400-0400-1800A-C (50 Pcs) --- Machine Keys - 4x4x18 mm - Carbon Steel Key Sale K-0400-0400-1800A-C (50 Pcs) --- Machine Keys - 4x4x18 mm - Carbon Steel Key Regular price $29.77 AUD Regular price ~~$35.73 AUD~~ Sale price $29.77 AUD Unit price per 50 Per Sell Unit Excludes GST and overseas Taxes & Duties Out of stock! Backorder Now Sale
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 20.00 mm _{+/ - 0.25} (Equiv. 0.787 in.)
Material: Carbon Steel Finish: Plain Tolerance Type: Standard Undersized End Type: A (Rounded Ends) Additional stock available from USA subject to Prior Sale = 5735
Part Number: K-0400-0400-2000A-C (5 Pcs) Machine Keys - 4x4x20 mm - Carbon Steel Key 86 units (430 pcs) Available Now \| Further orders can be expected around Fri, Nov 28, 2025 Regular price $3.95 AUD Regular price Sale price $3.95 AUD Unit price per 5 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required 86 units (430 pcs) Available Now. Backorder if more than 86.
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 20.00 mm _{+/ - 0.25} (Equiv. 0.787 in.)
Material: Carbon Steel Finish: Plain Tolerance Type: Standard Undersized End Type: A (Rounded Ends) Additional stock available from USA subject to Prior Sale = 5735
Part Number: K-0400-0400-2000A-C (5 Pcs) Machine Keys - 4x4x20 mm - Carbon Steel Key 86 units (430 pcs) Available Now \| Further orders can be expected around Fri, Nov 28, 2025 Regular price $3.95 AUD Regular price Sale price $3.95 AUD Unit price per 5 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required 86 units (430 pcs) Available Now. Backorder if more than 86.
K-0400-0400-2000A-C (5 Pcs) --- Machine Keys - 4x4x20 mm - Carbon Steel Key K-0400-0400-2000A-C (5 Pcs) --- Machine Keys - 4x4x20 mm - Carbon Steel Key Regular price $3.95 AUD Regular price Sale price $3.95 AUD Unit price per 5 Per Sell Unit Excludes GST and overseas Taxes & Duties 86 Available Now
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 20.00 mm _{+/ - 0.25} (Equiv. 0.787 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Standard Undersized End Type: B (Square Ends) Additional stock available from USA subject to Prior Sale = 824
Part Number: K-0400-0400-2000B-C (100 Pcs) Machine Keys - 4x4x20 mm - Carbon Steel C45 Key Out of Stock \| Backorder Now \| Orders can be expected around Fri, Nov 28, 2025 Regular price $33.23 AUD Regular price ~~$39.87 AUD~~ Sale price $33.23 AUD Unit price per 100 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required Backorder: Out of Stock.
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 20.00 mm _{+/ - 0.25} (Equiv. 0.787 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Standard Undersized End Type: B (Square Ends) Additional stock available from USA subject to Prior Sale = 824
Part Number: K-0400-0400-2000B-C (100 Pcs) Machine Keys - 4x4x20 mm - Carbon Steel C45 Key Out of Stock \| Backorder Now \| Orders can be expected around Fri, Nov 28, 2025 Regular price $33.23 AUD Regular price ~~$39.87 AUD~~ Sale price $33.23 AUD Unit price per 100 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required Backorder: Out of Stock.
K-0400-0400-2000B-C (100 Pcs) --- Machine Keys - 4x4x20 mm - Carbon Steel C45 Key Sale K-0400-0400-2000B-C (100 Pcs) --- Machine Keys - 4x4x20 mm - Carbon Steel C45 Key Regular price $33.23 AUD Regular price ~~$39.87 AUD~~ Sale price $33.23 AUD Unit price per 100 Per Sell Unit Excludes GST and overseas Taxes & Duties Out of stock! Backorder Now Sale
Width (W) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Length (L) 20.00 mm _{+/ - 0.25} (Equiv. 0.787 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Oversized End Type: A (Rounded Ends)
Part Number: K-0400-0400-2000AO-C Machine Keys - 4x4x20 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity
Width (W) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Length (L) 20.00 mm _{+/ - 0.25} (Equiv. 0.787 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Oversized End Type: A (Rounded Ends)
Part Number: K-0400-0400-2000AO-C Machine Keys - 4x4x20 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity \| Orders can be expected around Wed, Jul 26, 2028
Width (W) 4.00 mm (Equiv. 0.157 in.)	Height (h) 4.00 mm (Equiv. 0.157 in.)	Length (L) 20.00 mm (Equiv. 0.787 in.)
Material: Carbon Steel Finish: Plain Tolerance Type: Standard End Type: AB (1 end rounded, other end square)
Part Number: K-0400-0400-2000AB-C Machine Keys - 4x4x20 mm - Carbon Steel Key Out of Stock \| Backorder Now \| Orders can be expected around Sun, Dec 07, 2025 Regular price $1.41 AUD Regular price ~~$1.69 AUD~~ Sale price $1.41 AUD Unit price per Each Excludes GST and overseas Taxes & Duties Quantity Required Backorder: Out of Stock.
Width (W) 4.00 mm (Equiv. 0.157 in.)	Height (h) 4.00 mm (Equiv. 0.157 in.)	Length (L) 20.00 mm (Equiv. 0.787 in.)
Material: Carbon Steel Finish: Plain Tolerance Type: Standard End Type: AB (1 end rounded, other end square)
Part Number: K-0400-0400-2000AB-C Machine Keys - 4x4x20 mm - Carbon Steel Key Out of Stock \| Backorder Now \| Orders can be expected around Sun, Dec 07, 2025 Regular price $1.41 AUD Regular price ~~$1.69 AUD~~ Sale price $1.41 AUD Unit price per Each Excludes GST and overseas Taxes & Duties Quantity Required Backorder: Out of Stock.
K-0400-0400-2000AB-C --- Machine Keys - 4x4x20 mm - Carbon Steel Key Sale K-0400-0400-2000AB-C --- Machine Keys - 4x4x20 mm - Carbon Steel Key Regular price $1.41 AUD Regular price ~~$1.69 AUD~~ Sale price $1.41 AUD Unit price per Each Excludes GST and overseas Taxes & Duties Out of stock! Backorder Now Sale
Width (W) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Length (L) 20.00 mm _{+/ - 0.25} (Equiv. 0.787 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Oversized End Type: B (Square Ends)
Part Number: K-0400-0400-2000BO-C Machine Keys - 4x4x20 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity
Width (W) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Length (L) 20.00 mm _{+/ - 0.25} (Equiv. 0.787 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Oversized End Type: B (Square Ends)
Part Number: K-0400-0400-2000BO-C Machine Keys - 4x4x20 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity \| Orders can be expected around Wed, Jul 26, 2028
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 25.00 mm _{+/ - 0.25} (Equiv. 0.984 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Standard End Type: B (Square Ends) Additional stock available from USA subject to Prior Sale = 1300
Part Number: K-0400-0400-2500B-C (50 Pcs) Machine Keys - 4x4x25 mm - Carbon Steel C45 Key Out of Stock \| Backorder Now \| Orders can be expected around Fri, Nov 28, 2025 Regular price $12.50 AUD Regular price ~~$15.00 AUD~~ Sale price $12.50 AUD Unit price per 50 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required Backorder: Out of Stock.
Width (W) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0 / - 0.030} (Equiv. 0.157 in.)	Length (L) 25.00 mm _{+/ - 0.25} (Equiv. 0.984 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Standard End Type: B (Square Ends) Additional stock available from USA subject to Prior Sale = 1300
Part Number: K-0400-0400-2500B-C (50 Pcs) Machine Keys - 4x4x25 mm - Carbon Steel C45 Key Out of Stock \| Backorder Now \| Orders can be expected around Fri, Nov 28, 2025 Regular price $12.50 AUD Regular price ~~$15.00 AUD~~ Sale price $12.50 AUD Unit price per 50 Per Sell Unit Excludes GST and overseas Taxes & Duties Quantity Required Backorder: Out of Stock.
K-0400-0400-2500B-C (50 Pcs) --- Machine Keys - 4x4x25 mm - Carbon Steel C45 Key Sale K-0400-0400-2500B-C (50 Pcs) --- Machine Keys - 4x4x25 mm - Carbon Steel C45 Key Regular price $12.50 AUD Regular price ~~$15.00 AUD~~ Sale price $12.50 AUD Unit price per 50 Per Sell Unit Excludes GST and overseas Taxes & Duties Out of stock! Backorder Now Sale
Width (W) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Length (L) 25.00 mm _{+/ - 0.25} (Equiv. 0.984 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Oversized End Type: B (Square Ends)
Part Number: K-0400-0400-2500BO-C Machine Keys - 4x4x25 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity
Width (W) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Height (h) 4.00 mm _{+ 0.030 / - 0.0} (Equiv. 0.157 in.)	Length (L) 25.00 mm _{+/ - 0.25} (Equiv. 0.984 in.)
Material: Carbon Steel C45 Finish: Plain Tolerance Type: Oversized End Type: B (Square Ends)
Part Number: K-0400-0400-2500BO-C Machine Keys - 4x4x25 mm - Carbon Steel C45 Key Contact Us \| Special Order Only - Please contact us if you need a large quantity \| Orders can be expected around Wed, Jul 26, 2028

Miniature Bearings Australia

Collection: Keys - Machine - Carbon Steel

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K-0400-0400-1200B-C (5 Pcs) --- Machine Keys - 4x4x12 mm - Carbon Steel C45 Key

K-0400-0400-1200B-C (5 Pcs) --- Machine Keys - 4x4x12 mm - Carbon Steel C45 Key

K-0400-0400-1200A-C (50 Pcs) --- Machine Keys - 4x4x12 mm - Carbon Steel Key

K-0400-0400-1200A-C (50 Pcs) --- Machine Keys - 4x4x12 mm - Carbon Steel Key

K-0400-0400-1400B-C (600 Pcs) --- Machine Keys - 4x4x14 mm - Carbon Steel C45 Key

K-0400-0400-1400B-C (600 Pcs) --- Machine Keys - 4x4x14 mm - Carbon Steel C45 Key

K-0400-0400-1400A-C (5 Pcs) --- Machine Keys - 4x4x14 mm - Carbon Steel Key

K-0400-0400-1400A-C (5 Pcs) --- Machine Keys - 4x4x14 mm - Carbon Steel Key

K-0400-0400-1500A-C (375 Pcs) --- Machine Keys - 4x4x15 mm - Carbon Steel Key

K-0400-0400-1500A-C (375 Pcs) --- Machine Keys - 4x4x15 mm - Carbon Steel Key

K-0400-0400-1600AB-C --- Machine Keys - 4x4x16 mm - Carbon Steel Key

K-0400-0400-1600AB-C --- Machine Keys - 4x4x16 mm - Carbon Steel Key

K-0400-0400-1600A-C (10 Pcs) --- Machine Keys - 4x4x16 mm - Carbon Steel Key

K-0400-0400-1600A-C (10 Pcs) --- Machine Keys - 4x4x16 mm - Carbon Steel Key

K-0400-0400-1600B-C (100 Pcs) --- Machine Keys - 4x4x16 mm - Carbon Steel C45 Key

K-0400-0400-1600B-C (100 Pcs) --- Machine Keys - 4x4x16 mm - Carbon Steel C45 Key

K-0400-0400-1800A-C (50 Pcs) --- Machine Keys - 4x4x18 mm - Carbon Steel Key

K-0400-0400-1800A-C (50 Pcs) --- Machine Keys - 4x4x18 mm - Carbon Steel Key

K-0400-0400-2000A-C (5 Pcs) --- Machine Keys - 4x4x20 mm - Carbon Steel Key

K-0400-0400-2000A-C (5 Pcs) --- Machine Keys - 4x4x20 mm - Carbon Steel Key

K-0400-0400-2000B-C (100 Pcs) --- Machine Keys - 4x4x20 mm - Carbon Steel C45 Key

K-0400-0400-2000B-C (100 Pcs) --- Machine Keys - 4x4x20 mm - Carbon Steel C45 Key

K-0400-0400-2000AB-C --- Machine Keys - 4x4x20 mm - Carbon Steel Key

K-0400-0400-2000AB-C --- Machine Keys - 4x4x20 mm - Carbon Steel Key

K-0400-0400-2500B-C (50 Pcs) --- Machine Keys - 4x4x25 mm - Carbon Steel C45 Key

K-0400-0400-2500B-C (50 Pcs) --- Machine Keys - 4x4x25 mm - Carbon Steel C45 Key

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Miniature Bearings Australia

Collection: Keys - Machine - Carbon Steel

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