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 Wed, Nov 05, 2025
Regular price $8.14 AUD
Regular price $15.30 AUD Sale price $8.14 AUD
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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 Wed, Nov 05, 2025
Regular price $8.14 AUD
Regular price $15.30 AUD Sale price $8.14 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.32 AUD
Regular price $13.79 AUD Sale price $7.32 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.32 AUD
Regular price $13.79 AUD Sale price $7.32 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.41 AUD
Regular price $14.08 AUD Sale price $7.41 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.41 AUD
Regular price $14.08 AUD Sale price $7.41 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.59 AUD
Regular price $14.36 AUD Sale price $7.59 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.59 AUD
Regular price $14.36 AUD Sale price $7.59 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $8.05 AUD
Regular price $15.19 AUD Sale price $8.05 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $8.05 AUD
Regular price $15.19 AUD Sale price $8.05 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $8.32 AUD
Regular price $15.73 AUD Sale price $8.32 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $8.32 AUD
Regular price $15.73 AUD Sale price $8.32 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Oct 01, 2025
Regular price $5.50 AUD
Regular price $6.60 AUD Sale price $5.50 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Oct 01, 2025
Regular price $5.50 AUD
Regular price $6.60 AUD Sale price $5.50 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.41 AUD
Regular price $14.04 AUD Sale price $7.41 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.41 AUD
Regular price $14.04 AUD Sale price $7.41 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.59 AUD
Regular price $14.40 AUD Sale price $7.59 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.59 AUD
Regular price $14.40 AUD Sale price $7.59 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.77 AUD
Regular price $14.72 AUD Sale price $7.77 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.77 AUD
Regular price $14.72 AUD Sale price $7.77 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $8.23 AUD
Regular price $15.59 AUD Sale price $8.23 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $8.23 AUD
Regular price $15.59 AUD Sale price $8.23 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $6.59 AUD
Regular price $16.38 AUD Sale price $6.59 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $6.59 AUD
Regular price $16.38 AUD Sale price $6.59 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.59 AUD
Regular price $14.33 AUD Sale price $7.59 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.59 AUD
Regular price $14.33 AUD Sale price $7.59 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.77 AUD
Regular price $14.65 AUD Sale price $7.77 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.77 AUD
Regular price $14.65 AUD Sale price $7.77 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.95 AUD
Regular price $15.05 AUD Sale price $7.95 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.95 AUD
Regular price $15.05 AUD Sale price $7.95 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $8.59 AUD
Regular price $16.16 AUD Sale price $8.59 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $8.59 AUD
Regular price $16.16 AUD Sale price $8.59 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $8.86 AUD
Regular price $16.78 AUD Sale price $8.86 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $8.86 AUD
Regular price $16.78 AUD Sale price $8.86 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.86 AUD
Regular price $14.94 AUD Sale price $7.86 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.86 AUD
Regular price $14.94 AUD Sale price $7.86 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $8.14 AUD
Regular price $15.37 AUD Sale price $8.14 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $8.14 AUD
Regular price $15.37 AUD Sale price $8.14 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $8.77 AUD
Regular price $16.52 AUD Sale price $8.77 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $8.77 AUD
Regular price $16.52 AUD Sale price $8.77 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.68 AUD
Regular price $14.58 AUD Sale price $7.68 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $7.68 AUD
Regular price $14.58 AUD Sale price $7.68 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $9.32 AUD
Regular price $17.57 AUD Sale price $9.32 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $9.32 AUD
Regular price $17.57 AUD Sale price $9.32 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $8.32 AUD
Regular price $15.73 AUD Sale price $8.32 AUD
Excludes GST and overseas Taxes & Duties
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 Wed, Nov 05, 2025
Regular price $8.32 AUD
Regular price $15.73 AUD Sale price $8.32 AUD
Excludes GST and overseas Taxes & Duties
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)
1.40
mm

(Equiv. 0.055 in.)
Max. Extension (L1)
122.428
mm
Spring Rate
0.74
N/mm
Initial Tension (IT)
0.8
N
Extension Springs - 12.7x63.5x1.4 mm - Stainless Steel 302/304 Similar to A2, 18-8
Material: Stainless Steel 302/304 (Similar to A2, 18-8)    Load at L1: 10.91 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-1270-0635-14-S2
Extension Springs - 12.7x63.5x1.4 mm - Stainless Steel 302/304 Similar to A2, 18-8 Spring
1 Available Now | Further orders can be expected around Fri, Oct 17, 2025
Regular price $21.59 AUD
Regular price Sale price $21.59 AUD
Excludes GST and overseas Taxes & Duties
Each
Quantity Required

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

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

(Equiv. 2.5 in.)
Wire Diameter (d)
1.40
mm

(Equiv. 0.055 in.)
Max. Extension (L1)
122.428
mm
Extension Springs - 12.7x63.5x1.4 mm - Stainless Steel 302/304 Similar to A2, 18-8
Material: Stainless Steel 302/304 (Similar to A2, 18-8)    Spring Rate: 0.74 N/mm    Initial Tension (IT): 0.8 N    Load at L1: 10.91 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-1270-0635-14-S2
Extension Springs - 12.7x63.5x1.4 mm - Stainless Steel 302/304 Similar to A2, 18-8 Spring
1 Available Now | Further orders can be expected around Fri, Oct 17, 2025
Regular price $21.59 AUD
Regular price Sale price $21.59 AUD
Excludes GST and overseas Taxes & Duties
Each
Quantity Required

1 Available Now. Backorder if more than 1.