Collection: Springs - Extension

Springs -> Extension
OD (D0) Overall Length (L0) Wire Diameter (d) Max. Extension (L1) Spring Rate Initial Tension (IT) Indicative
Image
Extension Springs - 4x25x0.4 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
25
mm
Wire Diameter (d)
0.400
mm
Max. Extension (L1)
47.50
mm
Spring Rate
0.12
N/mm
Initial Tension (IT)
0.6
N
Extension Springs - 4x25x0.4 mm - Steel
Material: Steel    Load at L1: 3.24 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0250-04-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.41 AUD
Regular price $13.14 AUD Sale price $6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
OD (D0) Overall Length (L0) Wire Diameter (d) Max. Extension (L1) Indicative
Image
Extension Springs - 4x25x0.4 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
25
mm
Wire Diameter (d)
0.400
mm
Max. Extension (L1)
47.50
mm
Extension Springs - 4x25x0.4 mm - Steel
Material: Steel    Spring Rate: 0.12 N/mm    Initial Tension (IT): 0.6 N    Load at L1: 3.24 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0250-04-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.41 AUD
Regular price $13.14 AUD Sale price $6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x25x0.4 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
25
mm
Wire Diameter (d)
0.400
mm
Max. Extension (L1)
47.50
mm
Spring Rate
0.12
N/mm
Initial Tension (IT)
0.6
N
Extension Springs - 4x25x0.4 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Load at L1: 3.24 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0250-04-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $9.50 AUD
Regular price $11.40 AUD Sale price $9.50 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x25x0.4 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
25
mm
Wire Diameter (d)
0.400
mm
Max. Extension (L1)
47.50
mm
Extension Springs - 4x25x0.4 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Spring Rate: 0.12 N/mm    Initial Tension (IT): 0.6 N    Load at L1: 3.24 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0250-04-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $9.50 AUD
Regular price $11.40 AUD Sale price $9.50 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x25x0.45 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
25
mm
Wire Diameter (d)
0.450
mm
Max. Extension (L1)
41.90
mm
Spring Rate
0.23
N/mm
Initial Tension (IT)
1.0
N
Extension Springs - 4x25x0.45 mm - Steel
Material: Steel    Load at L1: 4.81 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0250-045-M (PK-100)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $124.23 AUD
Regular price $262.80 AUD Sale price $124.23 AUD
Priced, Stocked and Sold Per 100 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x25x0.45 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
25
mm
Wire Diameter (d)
0.450
mm
Max. Extension (L1)
41.90
mm
Extension Springs - 4x25x0.45 mm - Steel
Material: Steel    Spring Rate: 0.23 N/mm    Initial Tension (IT): 1.0 N    Load at L1: 4.81 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0250-045-M (PK-100)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $124.23 AUD
Regular price $262.80 AUD Sale price $124.23 AUD
Priced, Stocked and Sold Per 100 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x25x0.45 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
25
mm
Wire Diameter (d)
0.450
mm
Max. Extension (L1)
41.90
mm
Spring Rate
0.23
N/mm
Initial Tension (IT)
1.0
N
Extension Springs - 4x25x0.45 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Load at L1: 4.81 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0250-045-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $8.23 AUD
Regular price $9.87 AUD Sale price $8.23 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x25x0.45 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
25
mm
Wire Diameter (d)
0.450
mm
Max. Extension (L1)
41.90
mm
Extension Springs - 4x25x0.45 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Spring Rate: 0.23 N/mm    Initial Tension (IT): 1.0 N    Load at L1: 4.81 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0250-045-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $8.23 AUD
Regular price $9.87 AUD Sale price $8.23 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x25x0.5 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
25
mm
Wire Diameter (d)
0.500
mm
Max. Extension (L1)
38.60
mm
Spring Rate
0.39
N/mm
Initial Tension (IT)
1.2
N
Extension Springs - 4x25x0.5 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Load at L1: 6.37 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0250-05-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $9.50 AUD
Regular price $11.40 AUD Sale price $9.50 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x25x0.5 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
25
mm
Wire Diameter (d)
0.500
mm
Max. Extension (L1)
38.60
mm
Extension Springs - 4x25x0.5 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Spring Rate: 0.39 N/mm    Initial Tension (IT): 1.2 N    Load at L1: 6.37 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0250-05-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $9.50 AUD
Regular price $11.40 AUD Sale price $9.50 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x25x0.5 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
25
mm
Wire Diameter (d)
0.500
mm
Max. Extension (L1)
38.90
mm
Spring Rate
0.39
N/mm
Initial Tension (IT)
1.2
N
Extension Springs - 4x25x0.5 mm - Steel
Material: Steel    Load at L1: 6.37 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0250-05-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.41 AUD
Regular price $13.14 AUD Sale price $6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x25x0.5 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
25
mm
Wire Diameter (d)
0.500
mm
Max. Extension (L1)
38.90
mm
Extension Springs - 4x25x0.5 mm - Steel
Material: Steel    Spring Rate: 0.39 N/mm    Initial Tension (IT): 1.2 N    Load at L1: 6.37 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0250-05-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.41 AUD
Regular price $13.14 AUD Sale price $6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x25x0.55 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
25
mm
Wire Diameter (d)
0.550
mm
Max. Extension (L1)
35.00
mm
Spring Rate
0.66
N/mm
Initial Tension (IT)
1.9
N
Extension Springs - 4x25x0.55 mm - Steel
Material: Steel    Load at L1: 8.43 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0250-055-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.41 AUD
Regular price $13.14 AUD Sale price $6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x25x0.55 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
25
mm
Wire Diameter (d)
0.550
mm
Max. Extension (L1)
35.00
mm
Extension Springs - 4x25x0.55 mm - Steel
Material: Steel    Spring Rate: 0.66 N/mm    Initial Tension (IT): 1.9 N    Load at L1: 8.43 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0250-055-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.41 AUD
Regular price $13.14 AUD Sale price $6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x30x0.35 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
30
mm
Wire Diameter (d)
0.350
mm
Max. Extension (L1)
72.70
mm
Spring Rate
0.05
N/mm
Initial Tension (IT)
0.2
N
Extension Springs - 4x30x0.35 mm - Steel
Material: Steel    Load at L1: 2.26 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0300-035-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.41 AUD
Regular price $13.14 AUD Sale price $6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x30x0.35 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
30
mm
Wire Diameter (d)
0.350
mm
Max. Extension (L1)
72.70
mm
Extension Springs - 4x30x0.35 mm - Steel
Material: Steel    Spring Rate: 0.05 N/mm    Initial Tension (IT): 0.2 N    Load at L1: 2.26 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0300-035-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.41 AUD
Regular price $13.14 AUD Sale price $6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x30x0.35 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
30
mm
Wire Diameter (d)
0.350
mm
Max. Extension (L1)
72.70
mm
Spring Rate
0.05
N/mm
Initial Tension (IT)
0.2
N
Extension Springs - 4x30x0.35 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Load at L1: 2.26 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0300-035-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $10.32 AUD
Regular price $12.38 AUD Sale price $10.32 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x30x0.35 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
30
mm
Wire Diameter (d)
0.350
mm
Max. Extension (L1)
72.70
mm
Extension Springs - 4x30x0.35 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Spring Rate: 0.05 N/mm    Initial Tension (IT): 0.2 N    Load at L1: 2.26 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0300-035-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $10.32 AUD
Regular price $12.38 AUD Sale price $10.32 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x30x0.4 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
30
mm
Wire Diameter (d)
0.400
mm
Max. Extension (L1)
58.40
mm
Spring Rate
0.09
N/mm
Initial Tension (IT)
0.6
N
Extension Springs - 4x30x0.4 mm - Steel
Material: Steel    Load at L1: 3.24 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0300-04-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.41 AUD
Regular price $13.14 AUD Sale price $6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x30x0.4 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
30
mm
Wire Diameter (d)
0.400
mm
Max. Extension (L1)
58.40
mm
Extension Springs - 4x30x0.4 mm - Steel
Material: Steel    Spring Rate: 0.09 N/mm    Initial Tension (IT): 0.6 N    Load at L1: 3.24 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0300-04-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.41 AUD
Regular price $13.14 AUD Sale price $6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x30x0.4 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
30
mm
Wire Diameter (d)
0.400
mm
Max. Extension (L1)
58.40
mm
Spring Rate
0.09
N/mm
Initial Tension (IT)
0.6
N
Extension Springs - 4x30x0.4 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Load at L1: 3.24 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0300-04-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $10.68 AUD
Regular price $12.82 AUD Sale price $10.68 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x30x0.4 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
30
mm
Wire Diameter (d)
0.400
mm
Max. Extension (L1)
58.40
mm
Extension Springs - 4x30x0.4 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Spring Rate: 0.09 N/mm    Initial Tension (IT): 0.6 N    Load at L1: 3.24 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0300-04-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $10.68 AUD
Regular price $12.82 AUD Sale price $10.68 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x30x0.45 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
30
mm
Wire Diameter (d)
0.450
mm
Max. Extension (L1)
51.70
mm
Spring Rate
0.18
N/mm
Initial Tension (IT)
1.0
N
Extension Springs - 4x30x0.45 mm - Steel
Material: Steel    Load at L1: 4.81 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0300-045-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.41 AUD
Regular price $13.14 AUD Sale price $6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x30x0.45 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
30
mm
Wire Diameter (d)
0.450
mm
Max. Extension (L1)
51.70
mm
Extension Springs - 4x30x0.45 mm - Steel
Material: Steel    Spring Rate: 0.18 N/mm    Initial Tension (IT): 1.0 N    Load at L1: 4.81 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0300-045-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.41 AUD
Regular price $13.14 AUD Sale price $6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x30x0.45 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
30
mm
Wire Diameter (d)
0.450
mm
Max. Extension (L1)
51.70
mm
Spring Rate
0.18
N/mm
Initial Tension (IT)
1.0
N
Extension Springs - 4x30x0.45 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Load at L1: 4.81 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0300-045-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $11.23 AUD
Regular price $13.47 AUD Sale price $11.23 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x30x0.45 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
30
mm
Wire Diameter (d)
0.450
mm
Max. Extension (L1)
51.70
mm
Extension Springs - 4x30x0.45 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Spring Rate: 0.18 N/mm    Initial Tension (IT): 1.0 N    Load at L1: 4.81 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0300-045-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $11.23 AUD
Regular price $13.47 AUD Sale price $11.23 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x30x0.5 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
30
mm
Wire Diameter (d)
0.500
mm
Max. Extension (L1)
47.50
mm
Spring Rate
0.29
N/mm
Initial Tension (IT)
1.2
N
Extension Springs - 4x30x0.5 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Load at L1: 6.37 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0300-05-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $10.68 AUD
Regular price $12.82 AUD Sale price $10.68 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x30x0.5 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
30
mm
Wire Diameter (d)
0.500
mm
Max. Extension (L1)
47.50
mm
Extension Springs - 4x30x0.5 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Spring Rate: 0.29 N/mm    Initial Tension (IT): 1.2 N    Load at L1: 6.37 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0300-05-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $10.68 AUD
Regular price $12.82 AUD Sale price $10.68 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x30x0.5 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
30
mm
Wire Diameter (d)
0.500
mm
Max. Extension (L1)
47.50
mm
Spring Rate
0.29
N/mm
Initial Tension (IT)
1.2
N
Extension Springs - 4x30x0.5 mm - Steel
Material: Steel    Load at L1: 6.37 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0300-05-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.41 AUD
Regular price $13.14 AUD Sale price $6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x30x0.5 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
30
mm
Wire Diameter (d)
0.500
mm
Max. Extension (L1)
47.50
mm
Extension Springs - 4x30x0.5 mm - Steel
Material: Steel    Spring Rate: 0.29 N/mm    Initial Tension (IT): 1.2 N    Load at L1: 6.37 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0300-05-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.41 AUD
Regular price $13.14 AUD Sale price $6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x35x0.4 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
35
mm
Wire Diameter (d)
0.400
mm
Max. Extension (L1)
68.70
mm
Spring Rate
0.08
N/mm
Initial Tension (IT)
0.6
N
Extension Springs - 4x35x0.4 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Load at L1: 3.24 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0350-04-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $13.50 AUD
Regular price $16.20 AUD Sale price $13.50 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x35x0.4 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
35
mm
Wire Diameter (d)
0.400
mm
Max. Extension (L1)
68.70
mm
Extension Springs - 4x35x0.4 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Spring Rate: 0.08 N/mm    Initial Tension (IT): 0.6 N    Load at L1: 3.24 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0350-04-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $13.50 AUD
Regular price $16.20 AUD Sale price $13.50 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x35x0.4 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
35
mm
Wire Diameter (d)
0.400
mm
Max. Extension (L1)
68.70
mm
Spring Rate
0.08
N/mm
Initial Tension (IT)
0.6
N
Extension Springs - 4x35x0.4 mm - Steel
Material: Steel    Load at L1: 3.24 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0350-04-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.41 AUD
Regular price $13.14 AUD Sale price $6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x35x0.4 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
35
mm
Wire Diameter (d)
0.400
mm
Max. Extension (L1)
68.70
mm
Extension Springs - 4x35x0.4 mm - Steel
Material: Steel    Spring Rate: 0.08 N/mm    Initial Tension (IT): 0.6 N    Load at L1: 3.24 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0350-04-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.41 AUD
Regular price $13.14 AUD Sale price $6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x35x0.55 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
35
mm
Wire Diameter (d)
0.550
mm
Max. Extension (L1)
50.20
mm
Spring Rate
0.43
N/mm
Initial Tension (IT)
1.9
N
Extension Springs - 4x35x0.55 mm - Steel
Material: Steel    Load at L1: 8.43 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0350-055-M (PK-100)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $124.23 AUD
Regular price $262.80 AUD Sale price $124.23 AUD
Priced, Stocked and Sold Per 100 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x35x0.55 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
35
mm
Wire Diameter (d)
0.550
mm
Max. Extension (L1)
50.20
mm
Extension Springs - 4x35x0.55 mm - Steel
Material: Steel    Spring Rate: 0.43 N/mm    Initial Tension (IT): 1.9 N    Load at L1: 8.43 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0350-055-M (PK-100)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $124.23 AUD
Regular price $262.80 AUD Sale price $124.23 AUD
Priced, Stocked and Sold Per 100 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x40x0.35 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
40
mm
Wire Diameter (d)
0.350
mm
Max. Extension (L1)
100.30
mm
Spring Rate
0.03
N/mm
Initial Tension (IT)
0.2
N
Extension Springs - 4x40x0.35 mm - Steel
Material: Steel    Load at L1: 2.26 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0400-035-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.41 AUD
Regular price $13.14 AUD Sale price $6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x40x0.35 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
40
mm
Wire Diameter (d)
0.350
mm
Max. Extension (L1)
100.30
mm
Extension Springs - 4x40x0.35 mm - Steel
Material: Steel    Spring Rate: 0.03 N/mm    Initial Tension (IT): 0.2 N    Load at L1: 2.26 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0400-035-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.41 AUD
Regular price $13.14 AUD Sale price $6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x40x0.35 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
40
mm
Wire Diameter (d)
0.350
mm
Max. Extension (L1)
100.30
mm
Spring Rate
0.03
N/mm
Initial Tension (IT)
0.2
N
Extension Springs - 4x40x0.35 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Load at L1: 2.26 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0400-035-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $12.41 AUD
Regular price $14.89 AUD Sale price $12.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x40x0.35 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
40
mm
Wire Diameter (d)
0.350
mm
Max. Extension (L1)
100.30
mm
Extension Springs - 4x40x0.35 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Spring Rate: 0.03 N/mm    Initial Tension (IT): 0.2 N    Load at L1: 2.26 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0400-035-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $12.41 AUD
Regular price $14.89 AUD Sale price $12.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x40x0.4 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
40
mm
Wire Diameter (d)
0.400
mm
Max. Extension (L1)
78.50
mm
Spring Rate
0.07
N/mm
Initial Tension (IT)
0.6
N
Extension Springs - 4x40x0.4 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Load at L1: 3.24 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0400-04-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $13.95 AUD
Regular price $16.75 AUD Sale price $13.95 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x40x0.4 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
40
mm
Wire Diameter (d)
0.400
mm
Max. Extension (L1)
78.50
mm
Extension Springs - 4x40x0.4 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Spring Rate: 0.07 N/mm    Initial Tension (IT): 0.6 N    Load at L1: 3.24 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0400-04-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $13.95 AUD
Regular price $16.75 AUD Sale price $13.95 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x40x0.4 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
40
mm
Wire Diameter (d)
0.400
mm
Max. Extension (L1)
78.50
mm
Spring Rate
0.07
N/mm
Initial Tension (IT)
0.6
N
Extension Springs - 4x40x0.4 mm - Steel
Material: Steel    Load at L1: 3.24 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0400-04-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.41 AUD
Regular price $13.14 AUD Sale price $6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x40x0.4 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
40
mm
Wire Diameter (d)
0.400
mm
Max. Extension (L1)
78.50
mm
Extension Springs - 4x40x0.4 mm - Steel
Material: Steel    Spring Rate: 0.07 N/mm    Initial Tension (IT): 0.6 N    Load at L1: 3.24 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0400-04-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.41 AUD
Regular price $13.14 AUD Sale price $6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x40x0.45 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
40
mm
Wire Diameter (d)
0.450
mm
Max. Extension (L1)
70.00
mm
Spring Rate
0.13
N/mm
Initial Tension (IT)
1.0
N
Extension Springs - 4x40x0.45 mm - Steel
Material: Steel    Load at L1: 4.81 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0400-045-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.50 AUD
Regular price $13.41 AUD Sale price $6.50 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x40x0.45 mm Music Wire - Steel Spring
OD (D0)
4.00
mm
Overall Length (L0)
40
mm
Wire Diameter (d)
0.450
mm
Max. Extension (L1)
70.00
mm
Extension Springs - 4x40x0.45 mm - Steel
Material: Steel    Spring Rate: 0.13 N/mm    Initial Tension (IT): 1.0 N    Load at L1: 4.81 N   
Category: Springs - Extension - Music Wire
Part Number: ES-0400-0400-045-M (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $6.50 AUD
Regular price $13.41 AUD Sale price $6.50 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x40x0.45 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
40
mm
Wire Diameter (d)
0.450
mm
Max. Extension (L1)
70.00
mm
Spring Rate
0.13
N/mm
Initial Tension (IT)
1.0
N
Extension Springs - 4x40x0.45 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Load at L1: 4.81 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0400-045-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $12.77 AUD
Regular price $15.33 AUD Sale price $12.77 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Extension Springs - 4x40x0.45 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80 Spring
OD (D0)
4.00
mm
Overall Length (L0)
40
mm
Wire Diameter (d)
0.450
mm
Max. Extension (L1)
70.00
mm
Extension Springs - 4x40x0.45 mm - Stainless Steel 304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Spring Rate: 0.13 N/mm    Initial Tension (IT): 1.0 N    Load at L1: 4.81 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-0400-0400-045-S4 (PK-5)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 12, 2026
Regular price $12.77 AUD
Regular price $15.33 AUD Sale price $12.77 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.