Collection: Springs - Extension

Springs -> Extension
OD (D0) Overall Length (L0) Wire Diameter (d) Max. Extension (L1) Spring Rate Initial Tension (IT) Indicative
Image
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
31.8
mm

(Equiv. 1.252 in.)
Wire Diameter (d)
1.60
mm

(Equiv. 0.063 in.)
Max. Extension (L1)
41.400
mm
Spring Rate
8.210
N/mm
Initial Tension (IT)
7.6
N
Extension Springs - 12.7x31.8x1.6 mm - Steel
Material: Steel    Load at L1: 83.630 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0318-16-M
Extension Springs - 12.7x31.8x1.6 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $8.14 AUD
Regular price $15.30 AUD Sale price $8.14 AUD
Each
Quantity Required

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OD (D0) Overall Length (L0) Wire Diameter (d) Max. Extension (L1) Indicative
Image
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
31.8
mm

(Equiv. 1.252 in.)
Wire Diameter (d)
1.60
mm

(Equiv. 0.063 in.)
Max. Extension (L1)
41.400
mm
Extension Springs - 12.7x31.8x1.6 mm - Steel
Material: Steel    Spring Rate: 8.210 N/mm    Initial Tension (IT): 7.6 N    Load at L1: 83.630 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0318-16-M
Extension Springs - 12.7x31.8x1.6 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $8.14 AUD
Regular price $15.30 AUD Sale price $8.14 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
38.1
mm

(Equiv. 1.5 in.)
Wire Diameter (d)
0.89
mm

(Equiv. 0.035 in.)
Max. Extension (L1)
96.770
mm
Spring Rate
0.210
N/mm
Initial Tension (IT)
1.8
N
Extension Springs - 12.7x38.1x0.89 mm - Steel
Material: Steel    Load at L1: 14.110 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0381-09-M
Extension Springs - 12.7x38.1x0.89 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.32 AUD
Regular price $13.79 AUD Sale price $7.32 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
38.1
mm

(Equiv. 1.5 in.)
Wire Diameter (d)
0.89
mm

(Equiv. 0.035 in.)
Max. Extension (L1)
96.770
mm
Extension Springs - 12.7x38.1x0.89 mm - Steel
Material: Steel    Spring Rate: 0.210 N/mm    Initial Tension (IT): 1.8 N    Load at L1: 14.110 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0381-09-M
Extension Springs - 12.7x38.1x0.89 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.32 AUD
Regular price $13.79 AUD Sale price $7.32 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
38.1
mm

(Equiv. 1.5 in.)
Wire Diameter (d)
0.99
mm

(Equiv. 0.039 in.)
Max. Extension (L1)
84.330
mm
Spring Rate
0.508
N/mm
Initial Tension (IT)
2.2
N
Extension Springs - 12.7x38.1x0.99 mm - Steel
Material: Steel    Load at L1: 25.800 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0381-10-M
Extension Springs - 12.7x38.1x0.99 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.41 AUD
Regular price $14.08 AUD Sale price $7.41 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
38.1
mm

(Equiv. 1.5 in.)
Wire Diameter (d)
0.99
mm

(Equiv. 0.039 in.)
Max. Extension (L1)
84.330
mm
Extension Springs - 12.7x38.1x0.99 mm - Steel
Material: Steel    Spring Rate: 0.508 N/mm    Initial Tension (IT): 2.2 N    Load at L1: 25.800 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0381-10-M
Extension Springs - 12.7x38.1x0.99 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.41 AUD
Regular price $14.08 AUD Sale price $7.41 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
38.1
mm

(Equiv. 1.5 in.)
Wire Diameter (d)
1.40
mm

(Equiv. 0.055 in.)
Max. Extension (L1)
61.210
mm
Spring Rate
2.280
N/mm
Initial Tension (IT)
5.3
N
Extension Springs - 12.7x38.1x1.4 mm - Steel
Material: Steel    Load at L1: 58.270 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0381-14-M
Extension Springs - 12.7x38.1x1.4 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $8.05 AUD
Regular price $15.19 AUD Sale price $8.05 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
38.1
mm

(Equiv. 1.5 in.)
Wire Diameter (d)
1.40
mm

(Equiv. 0.055 in.)
Max. Extension (L1)
61.210
mm
Extension Springs - 12.7x38.1x1.4 mm - Steel
Material: Steel    Spring Rate: 2.280 N/mm    Initial Tension (IT): 5.3 N    Load at L1: 58.270 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0381-14-M
Extension Springs - 12.7x38.1x1.4 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $8.05 AUD
Regular price $15.19 AUD Sale price $8.05 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
38.1
mm

(Equiv. 1.5 in.)
Wire Diameter (d)
1.25
mm

(Equiv. 0.049 in.)
Max. Extension (L1)
67.060
mm
Spring Rate
1.366
N/mm
Initial Tension (IT)
3.9
N
Extension Springs - 12.7x38.1x1.25 mm - Steel
Material: Steel    Load at L1: 43.370 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0381-12-M
Extension Springs - 12.7x38.1x1.25 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.59 AUD
Regular price $14.36 AUD Sale price $7.59 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
38.1
mm

(Equiv. 1.5 in.)
Wire Diameter (d)
1.25
mm

(Equiv. 0.049 in.)
Max. Extension (L1)
67.060
mm
Extension Springs - 12.7x38.1x1.25 mm - Steel
Material: Steel    Spring Rate: 1.366 N/mm    Initial Tension (IT): 3.9 N    Load at L1: 43.370 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0381-12-M
Extension Springs - 12.7x38.1x1.25 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.59 AUD
Regular price $14.36 AUD Sale price $7.59 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
38.1
mm

(Equiv. 1.5 in.)
Wire Diameter (d)
1.60
mm

(Equiv. 0.063 in.)
Max. Extension (L1)
55.120
mm
Spring Rate
4.470
N/mm
Initial Tension (IT)
7.6
N
Extension Springs - 12.7x38.1x1.6 mm - Steel
Material: Steel    Load at L1: 83.630 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0381-16-M
Extension Springs - 12.7x38.1x1.6 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $8.32 AUD
Regular price $15.73 AUD Sale price $8.32 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
38.1
mm

(Equiv. 1.5 in.)
Wire Diameter (d)
1.60
mm

(Equiv. 0.063 in.)
Max. Extension (L1)
55.120
mm
Extension Springs - 12.7x38.1x1.6 mm - Steel
Material: Steel    Spring Rate: 4.470 N/mm    Initial Tension (IT): 7.6 N    Load at L1: 83.630 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0381-16-M
Extension Springs - 12.7x38.1x1.6 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $8.32 AUD
Regular price $15.73 AUD Sale price $8.32 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
41.3
mm

(Equiv. 1.626 in.)
Wire Diameter (d)
2.03
mm

(Equiv. 0.08 in.)
Spring Rate
11.59
N/mm
Initial Tension (IT)
11.6
N
Extension Springs - 12.7x41.3x2.03 mm - Hard Drawn - Zinc
Material: Hard Drawn - Zinc   
Category: Springs - Extension - Stainless Steel
Part Number: ES-1270-0413-20-M
Extension Springs - 12.7x41.3x2.03 mm Stainless Steel - Hard Drawn - Zinc Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Sep 19, 2025
Regular price $5.50 AUD
Regular price $6.60 AUD Sale price $5.50 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
41.3
mm

(Equiv. 1.626 in.)
Wire Diameter (d)
2.03
mm

(Equiv. 0.08 in.)
Extension Springs - 12.7x41.3x2.03 mm - Hard Drawn - Zinc
Material: Hard Drawn - Zinc    Spring Rate: 11.59 N/mm    Initial Tension (IT): 11.6 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-1270-0413-20-M
Extension Springs - 12.7x41.3x2.03 mm Stainless Steel - Hard Drawn - Zinc Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Sep 19, 2025
Regular price $5.50 AUD
Regular price $6.60 AUD Sale price $5.50 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
44.5
mm

(Equiv. 1.752 in.)
Wire Diameter (d)
0.89
mm

(Equiv. 0.035 in.)
Max. Extension (L1)
126.490
mm
Spring Rate
0.145
N/mm
Initial Tension (IT)
1.8
N
Extension Springs - 12.7x44.5x0.89 mm - Steel
Material: Steel    Load at L1: 14.110 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0445-09-M
Extension Springs - 12.7x44.5x0.89 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.41 AUD
Regular price $14.04 AUD Sale price $7.41 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
44.5
mm

(Equiv. 1.752 in.)
Wire Diameter (d)
0.89
mm

(Equiv. 0.035 in.)
Max. Extension (L1)
126.490
mm
Extension Springs - 12.7x44.5x0.89 mm - Steel
Material: Steel    Spring Rate: 0.145 N/mm    Initial Tension (IT): 1.8 N    Load at L1: 14.110 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0445-09-M
Extension Springs - 12.7x44.5x0.89 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.41 AUD
Regular price $14.04 AUD Sale price $7.41 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
44.5
mm

(Equiv. 1.752 in.)
Wire Diameter (d)
0.99
mm

(Equiv. 0.039 in.)
Max. Extension (L1)
108.970
mm
Spring Rate
0.350
N/mm
Initial Tension (IT)
2.2
N
Extension Springs - 12.7x44.5x0.99 mm - Steel
Material: Steel    Load at L1: 25.800 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0445-10-M
Extension Springs - 12.7x44.5x0.99 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.59 AUD
Regular price $14.40 AUD Sale price $7.59 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
44.5
mm

(Equiv. 1.752 in.)
Wire Diameter (d)
0.99
mm

(Equiv. 0.039 in.)
Max. Extension (L1)
108.970
mm
Extension Springs - 12.7x44.5x0.99 mm - Steel
Material: Steel    Spring Rate: 0.350 N/mm    Initial Tension (IT): 2.2 N    Load at L1: 25.800 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0445-10-M
Extension Springs - 12.7x44.5x0.99 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.59 AUD
Regular price $14.40 AUD Sale price $7.59 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
44.5
mm

(Equiv. 1.752 in.)
Wire Diameter (d)
1.25
mm

(Equiv. 0.049 in.)
Max. Extension (L1)
86.110
mm
Spring Rate
0.946
N/mm
Initial Tension (IT)
3.9
N
Extension Springs - 12.7x44.5x1.25 mm - Steel
Material: Steel    Load at L1: 43.370 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0445-12-M
Extension Springs - 12.7x44.5x1.25 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.77 AUD
Regular price $14.72 AUD Sale price $7.77 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
44.5
mm

(Equiv. 1.752 in.)
Wire Diameter (d)
1.25
mm

(Equiv. 0.049 in.)
Max. Extension (L1)
86.110
mm
Extension Springs - 12.7x44.5x1.25 mm - Steel
Material: Steel    Spring Rate: 0.946 N/mm    Initial Tension (IT): 3.9 N    Load at L1: 43.370 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0445-12-M
Extension Springs - 12.7x44.5x1.25 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.77 AUD
Regular price $14.72 AUD Sale price $7.77 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
44.5
mm

(Equiv. 1.752 in.)
Wire Diameter (d)
1.40
mm

(Equiv. 0.055 in.)
Max. Extension (L1)
76.450
mm
Spring Rate
1.576
N/mm
Initial Tension (IT)
5.3
N
Extension Springs - 12.7x44.5x1.4 mm - Steel
Material: Steel    Load at L1: 58.270 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0445-14-M
Extension Springs - 12.7x44.5x1.4 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $8.23 AUD
Regular price $15.59 AUD Sale price $8.23 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
44.5
mm

(Equiv. 1.752 in.)
Wire Diameter (d)
1.40
mm

(Equiv. 0.055 in.)
Max. Extension (L1)
76.450
mm
Extension Springs - 12.7x44.5x1.4 mm - Steel
Material: Steel    Spring Rate: 1.576 N/mm    Initial Tension (IT): 5.3 N    Load at L1: 58.270 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0445-14-M
Extension Springs - 12.7x44.5x1.4 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $8.23 AUD
Regular price $15.59 AUD Sale price $8.23 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
44.5
mm

(Equiv. 1.752 in.)
Wire Diameter (d)
1.60
mm

(Equiv. 0.063 in.)
Max. Extension (L1)
67.560
mm
Spring Rate
3.270
N/mm
Initial Tension (IT)
7.6
N
Extension Springs - 12.7x44.5x1.6 mm - Steel
Material: Steel    Load at L1: 83.630 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0445-16-M
Extension Springs - 12.7x44.5x1.6 mm Music Wire - Steel Spring
1 Available Now | Further orders can be expected around Fri, Oct 24, 2025
Regular price $6.59 AUD
Regular price $16.38 AUD Sale price $6.59 AUD
Each
Quantity Required

1 Available Now. Backorder if more than 1.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
44.5
mm

(Equiv. 1.752 in.)
Wire Diameter (d)
1.60
mm

(Equiv. 0.063 in.)
Max. Extension (L1)
67.560
mm
Extension Springs - 12.7x44.5x1.6 mm - Steel
Material: Steel    Spring Rate: 3.270 N/mm    Initial Tension (IT): 7.6 N    Load at L1: 83.630 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0445-16-M
Extension Springs - 12.7x44.5x1.6 mm Music Wire - Steel Spring
1 Available Now | Further orders can be expected around Fri, Oct 24, 2025
Regular price $6.59 AUD
Regular price $16.38 AUD Sale price $6.59 AUD
Each
Quantity Required

1 Available Now. Backorder if more than 1.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
50.8
mm

(Equiv. 2 in.)
Wire Diameter (d)
0.89
mm

(Equiv. 0.035 in.)
Max. Extension (L1)
155.450
mm
Spring Rate
0.129
N/mm
Initial Tension (IT)
1.8
N
Extension Springs - 12.7x50.8x0.89 mm - Steel
Material: Steel    Load at L1: 14.110 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0508-09-M
Extension Springs - 12.7x50.8x0.89 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.59 AUD
Regular price $14.33 AUD Sale price $7.59 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
50.8
mm

(Equiv. 2 in.)
Wire Diameter (d)
0.89
mm

(Equiv. 0.035 in.)
Max. Extension (L1)
155.450
mm
Extension Springs - 12.7x50.8x0.89 mm - Steel
Material: Steel    Spring Rate: 0.129 N/mm    Initial Tension (IT): 1.8 N    Load at L1: 14.110 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0508-09-M
Extension Springs - 12.7x50.8x0.89 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.59 AUD
Regular price $14.33 AUD Sale price $7.59 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
50.8
mm

(Equiv. 2 in.)
Wire Diameter (d)
0.99
mm

(Equiv. 0.039 in.)
Max. Extension (L1)
135.380
mm
Spring Rate
0.263
N/mm
Initial Tension (IT)
2.2
N
Extension Springs - 12.7x50.8x0.99 mm - Steel
Material: Steel    Load at L1: 25.800 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0508-10-M
Extension Springs - 12.7x50.8x0.99 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.77 AUD
Regular price $14.65 AUD Sale price $7.77 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
50.8
mm

(Equiv. 2 in.)
Wire Diameter (d)
0.99
mm

(Equiv. 0.039 in.)
Max. Extension (L1)
135.380
mm
Extension Springs - 12.7x50.8x0.99 mm - Steel
Material: Steel    Spring Rate: 0.263 N/mm    Initial Tension (IT): 2.2 N    Load at L1: 25.800 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0508-10-M
Extension Springs - 12.7x50.8x0.99 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.77 AUD
Regular price $14.65 AUD Sale price $7.77 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
50.8
mm

(Equiv. 2 in.)
Wire Diameter (d)
1.40
mm

(Equiv. 0.055 in.)
Max. Extension (L1)
91.440
mm
Spring Rate
1.296
N/mm
Initial Tension (IT)
5.3
N
Extension Springs - 12.7x50.8x1.4 mm - Steel
Material: Steel    Load at L1: 58.270 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0508-14-M
Extension Springs - 12.7x50.8x1.4 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $8.59 AUD
Regular price $16.16 AUD Sale price $8.59 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
50.8
mm

(Equiv. 2 in.)
Wire Diameter (d)
1.40
mm

(Equiv. 0.055 in.)
Max. Extension (L1)
91.440
mm
Extension Springs - 12.7x50.8x1.4 mm - Steel
Material: Steel    Spring Rate: 1.296 N/mm    Initial Tension (IT): 5.3 N    Load at L1: 58.270 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0508-14-M
Extension Springs - 12.7x50.8x1.4 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $8.59 AUD
Regular price $16.16 AUD Sale price $8.59 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
50.8
mm

(Equiv. 2 in.)
Wire Diameter (d)
1.25
mm

(Equiv. 0.049 in.)
Max. Extension (L1)
105.160
mm
Spring Rate
0.736
N/mm
Initial Tension (IT)
3.9
N
Extension Springs - 12.7x50.8x1.25 mm - Steel
Material: Steel    Load at L1: 43.370 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0508-12-M
Extension Springs - 12.7x50.8x1.25 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.95 AUD
Regular price $15.05 AUD Sale price $7.95 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
50.8
mm

(Equiv. 2 in.)
Wire Diameter (d)
1.25
mm

(Equiv. 0.049 in.)
Max. Extension (L1)
105.160
mm
Extension Springs - 12.7x50.8x1.25 mm - Steel
Material: Steel    Spring Rate: 0.736 N/mm    Initial Tension (IT): 3.9 N    Load at L1: 43.370 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0508-12-M
Extension Springs - 12.7x50.8x1.25 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.95 AUD
Regular price $15.05 AUD Sale price $7.95 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
50.8
mm

(Equiv. 2 in.)
Wire Diameter (d)
1.60
mm

(Equiv. 0.063 in.)
Max. Extension (L1)
80.260
mm
Spring Rate
2.590
N/mm
Initial Tension (IT)
7.6
N
Extension Springs - 12.7x50.8x1.6 mm - Steel
Material: Steel    Load at L1: 83.630 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0508-16-M
Extension Springs - 12.7x50.8x1.6 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $8.86 AUD
Regular price $16.78 AUD Sale price $8.86 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
50.8
mm

(Equiv. 2 in.)
Wire Diameter (d)
1.60
mm

(Equiv. 0.063 in.)
Max. Extension (L1)
80.260
mm
Extension Springs - 12.7x50.8x1.6 mm - Steel
Material: Steel    Spring Rate: 2.590 N/mm    Initial Tension (IT): 7.6 N    Load at L1: 83.630 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0508-16-M
Extension Springs - 12.7x50.8x1.6 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $8.86 AUD
Regular price $16.78 AUD Sale price $8.86 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
57.2
mm

(Equiv. 2.252 in.)
Wire Diameter (d)
0.89
mm

(Equiv. 0.035 in.)
Max. Extension (L1)
187.200
mm
Spring Rate
0.121
N/mm
Initial Tension (IT)
1.8
N
Extension Springs - 12.7x57.2x0.89 mm - Steel
Material: Steel    Load at L1: 14.110 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0572-09-M
Extension Springs - 12.7x57.2x0.89 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.68 AUD
Regular price $14.58 AUD Sale price $7.68 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
57.2
mm

(Equiv. 2.252 in.)
Wire Diameter (d)
0.89
mm

(Equiv. 0.035 in.)
Max. Extension (L1)
187.200
mm
Extension Springs - 12.7x57.2x0.89 mm - Steel
Material: Steel    Spring Rate: 0.121 N/mm    Initial Tension (IT): 1.8 N    Load at L1: 14.110 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0572-09-M
Extension Springs - 12.7x57.2x0.89 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.68 AUD
Regular price $14.58 AUD Sale price $7.68 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
57.2
mm

(Equiv. 2.252 in.)
Wire Diameter (d)
0.99
mm

(Equiv. 0.039 in.)
Max. Extension (L1)
160.020
mm
Spring Rate
0.228
N/mm
Initial Tension (IT)
2.2
N
Extension Springs - 12.7x57.2x0.99 mm - Steel
Material: Steel    Load at L1: 25.800 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0572-10-M
Extension Springs - 12.7x57.2x0.99 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.86 AUD
Regular price $14.94 AUD Sale price $7.86 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
57.2
mm

(Equiv. 2.252 in.)
Wire Diameter (d)
0.99
mm

(Equiv. 0.039 in.)
Max. Extension (L1)
160.020
mm
Extension Springs - 12.7x57.2x0.99 mm - Steel
Material: Steel    Spring Rate: 0.228 N/mm    Initial Tension (IT): 2.2 N    Load at L1: 25.800 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0572-10-M
Extension Springs - 12.7x57.2x0.99 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $7.86 AUD
Regular price $14.94 AUD Sale price $7.86 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
57.2
mm

(Equiv. 2.252 in.)
Wire Diameter (d)
1.40
mm

(Equiv. 0.055 in.)
Max. Extension (L1)
108.970
mm
Spring Rate
1.068
N/mm
Initial Tension (IT)
5.3
N
Extension Springs - 12.7x57.2x1.4 mm - Steel
Material: Steel    Load at L1: 58.270 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0572-14-M
Extension Springs - 12.7x57.2x1.4 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $8.77 AUD
Regular price $16.52 AUD Sale price $8.77 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
57.2
mm

(Equiv. 2.252 in.)
Wire Diameter (d)
1.40
mm

(Equiv. 0.055 in.)
Max. Extension (L1)
108.970
mm
Extension Springs - 12.7x57.2x1.4 mm - Steel
Material: Steel    Spring Rate: 1.068 N/mm    Initial Tension (IT): 5.3 N    Load at L1: 58.270 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0572-14-M
Extension Springs - 12.7x57.2x1.4 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $8.77 AUD
Regular price $16.52 AUD Sale price $8.77 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
57.2
mm

(Equiv. 2.252 in.)
Wire Diameter (d)
1.25
mm

(Equiv. 0.049 in.)
Max. Extension (L1)
124.210
mm
Spring Rate
0.595
N/mm
Initial Tension (IT)
3.9
N
Extension Springs - 12.7x57.2x1.25 mm - Steel
Material: Steel    Load at L1: 43.370 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0572-12-M
Extension Springs - 12.7x57.2x1.25 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $8.14 AUD
Regular price $15.37 AUD Sale price $8.14 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
57.2
mm

(Equiv. 2.252 in.)
Wire Diameter (d)
1.25
mm

(Equiv. 0.049 in.)
Max. Extension (L1)
124.210
mm
Extension Springs - 12.7x57.2x1.25 mm - Steel
Material: Steel    Spring Rate: 0.595 N/mm    Initial Tension (IT): 3.9 N    Load at L1: 43.370 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0572-12-M
Extension Springs - 12.7x57.2x1.25 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $8.14 AUD
Regular price $15.37 AUD Sale price $8.14 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
57.2
mm

(Equiv. 2.252 in.)
Wire Diameter (d)
1.60
mm

(Equiv. 0.063 in.)
Max. Extension (L1)
92.710
mm
Spring Rate
2.140
N/mm
Initial Tension (IT)
7.6
N
Extension Springs - 12.7x57.2x1.6 mm - Steel
Material: Steel    Load at L1: 83.630 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0572-16-M
Extension Springs - 12.7x57.2x1.6 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $9.32 AUD
Regular price $17.57 AUD Sale price $9.32 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
57.2
mm

(Equiv. 2.252 in.)
Wire Diameter (d)
1.60
mm

(Equiv. 0.063 in.)
Max. Extension (L1)
92.710
mm
Extension Springs - 12.7x57.2x1.6 mm - Steel
Material: Steel    Spring Rate: 2.140 N/mm    Initial Tension (IT): 7.6 N    Load at L1: 83.630 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0572-16-M
Extension Springs - 12.7x57.2x1.6 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $9.32 AUD
Regular price $17.57 AUD Sale price $9.32 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
63.5
mm

(Equiv. 2.5 in.)
Wire Diameter (d)
0.99
mm

(Equiv. 0.039 in.)
Max. Extension (L1)
185.670
mm
Spring Rate
0.193
N/mm
Initial Tension (IT)
2.2
N
Extension Springs - 12.7x63.5x0.99 mm - Steel
Material: Steel    Load at L1: 25.800 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0635-10-M
Extension Springs - 12.7x63.5x0.99 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $8.05 AUD
Regular price $15.26 AUD Sale price $8.05 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
63.5
mm

(Equiv. 2.5 in.)
Wire Diameter (d)
0.99
mm

(Equiv. 0.039 in.)
Max. Extension (L1)
185.670
mm
Extension Springs - 12.7x63.5x0.99 mm - Steel
Material: Steel    Spring Rate: 0.193 N/mm    Initial Tension (IT): 2.2 N    Load at L1: 25.800 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0635-10-M
Extension Springs - 12.7x63.5x0.99 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $8.05 AUD
Regular price $15.26 AUD Sale price $8.05 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
63.5
mm

(Equiv. 2.5 in.)
Wire Diameter (d)
1.25
mm

(Equiv. 0.049 in.)
Max. Extension (L1)
143.260
mm
Spring Rate
0.490
N/mm
Initial Tension (IT)
3.9
N
Extension Springs - 12.7x63.5x1.25 mm - Steel
Material: Steel    Load at L1: 43.370 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0635-12-M
Extension Springs - 12.7x63.5x1.25 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $8.32 AUD
Regular price $15.73 AUD Sale price $8.32 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
12.70
mm

(Equiv. 0.5 in.)
Overall Length (L0)
63.5
mm

(Equiv. 2.5 in.)
Wire Diameter (d)
1.25
mm

(Equiv. 0.049 in.)
Max. Extension (L1)
143.260
mm
Extension Springs - 12.7x63.5x1.25 mm - Steel
Material: Steel    Spring Rate: 0.490 N/mm    Initial Tension (IT): 3.9 N    Load at L1: 43.370 N   
Category: Springs - Extension - Music Wire
Part Number: ES-1270-0635-12-M
Extension Springs - 12.7x63.5x1.25 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 24, 2025
Regular price $8.32 AUD
Regular price $15.73 AUD Sale price $8.32 AUD
Each
Quantity Required

Backorder: Out of Stock.