Extension Springs

An extension spring or tension spring is a length of tightly coiled metal, usually steel with hooks or loops at either end. Extension springs absorb and store energy. You can find out more in our extension springs guide.

What does it do?

An extension spring is a component that creates a resis...

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RS PRO Steel Extension Spring, 59 mm x 8.5 mm OD
RS Stock No.: 751-916Brand: RS PRO

BD 12.122

BD 1.212 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
Extension Spring
Steel
59mm
98.6mm
8.5 mm
1.2mm
62.8N
1.35N/mm
DIN 17223, BS 1408 CR3, RoHS
RS PRO Steel Extension Spring, 50 mm x 10 mm OD
RS Stock No.: 751-865Brand: RS PRO

BD 8.039

BD 0.804 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
Extension Spring
Steel
50mm
142.2mm
10 mm
0.9mm
24N
0.23N/mm
RoHS, DIN 17223, BS 1408 CR3
RS PRO Steel Extension Spring, 44.6 mm x 9 mm OD
RS Stock No.: 751-837Brand: RS PRO

BD 8.804

BD 0.880 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
Extension Spring
Steel
44.6mm
130.2mm
9 mm
0.8mm
19N
0.19N/mm
BS 1408 CR3, DIN 17223, RoHS
RS PRO Stainless Steel Extension Spring, 37.7 mm x 5.5 mm OD
RS Stock No.: 821-453Brand: RS PRO

BD 8.230

BD 0.823 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
Extension Spring
Stainless Steel
37.7mm
116.1mm
5.5 mm
0.5mm
6.5N
0.07N/mm
DIN 17223, BS 1408 CR3, RoHS
RS PRO Steel Extension Spring, 77.8 mm x 13 mm OD
RS Stock No.: 121-359Brand: RS PRO

BD 8.709

BD 1.741 Each (In a Pack of 5) (Exc. Vat)

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RS Pro
Extension Spring
Steel
77.8mm
97.4mm
13 mm
2.5mm
317N
13.7N/mm
RoHS, DIN 17223, BS 1408 CR3
RS PRO Stainless Steel Extension Spring, 35 mm x 7 mm OD
RS Stock No.: 821-504Brand: RS PRO

BD 7.528

BD 0.752 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
Extension Spring
Stainless Steel
35mm
101.5mm
7 mm
0.63mm
1N
0.13N/mm
BS 1408 CR3, DIN 17223, RoHS
RS PRO Steel Extension Spring, 27.2 mm x 4 mm OD
RS Stock No.: 751-663Brand: RS PRO

BD 7.784

BD 0.779 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
Extension Spring
Steel
27.2mm
95.7mm
4 mm
0.36mm
4.26N
0.06N/mm
DIN 17223, RoHS, BS 1408 CR3
RS PRO Steel Extension Spring, 39.7 mm x 11 mm OD
RS Stock No.: 751-944Brand: RS PRO

BD 11.293

BD 1.130 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
Extension Spring
Steel
39.7mm
58.4mm
11 mm
1.6mm
111N
5.02N/mm
BS 1408 CR3, RoHS, DIN 17223
RS PRO Steel Extension Spring, 87.7 mm x 17 mm OD
RS Stock No.: 751-950Brand: RS PRO

BD 5.436

BD 5.436 1 Pack of 5 (Exc. Vat)

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RS Pro
Extension Spring
Steel
87.7mm
224.7mm
17 mm
1.6mm
11N
0.46N/mm
RoHS, DIN 17223, BS 1408 CR3
RS PRO Steel Extension Spring, 85.5 mm x 18 mm OD
RS Stock No.: 121-365Brand: RS PRO

BD 13.079

BD 2.616 Each (In a Pack of 5) (Exc. Vat)

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RS Pro
Extension Spring
Steel
85.5mm
133.1mm
18 mm
2.5mm
237N
4.27N/mm
RoHS, DIN 17223, BS 1408 CR3
RS PRO Stainless Steel Extension Spring, 24.5 mm x 3.5 mm OD
RS Stock No.: 821-431Brand: RS PRO

BD 7.209

BD 0.721 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
Extension Spring
Stainless Steel
24.5mm
41.8mm
3.5 mm
0.5mm
10N
0.49N/mm
DIN 17223, BS 1408 CR3, RoHS
RS PRO Steel Extension Spring, 44.1 mm x 6.3 mm OD
RS Stock No.: 751-859Brand: RS PRO

BD 7.401

BD 0.740 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
Extension Spring
Steel
44.1mm
73.8mm
6.3 mm
0.9mm
37.1N
1.06N/mm
DIN 17223, RoHS, BS 1408 CR3
RS PRO Steel Extension Spring, 32.6 mm x 9 mm OD
RS Stock No.: 751-821Brand: RS PRO

BD 9.060

BD 0.906 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
Extension Spring
Steel
32.6mm
86.1mm
9 mm
0.8mm
19N
0.3N/mm
DIN 17223, RoHS, BS 1408 CR3
RS PRO Steel Gate Spring, 200 mm
RS Stock No.: 894-6803Brand: RS PRO

BD 4.970

BD 4.970 Each (Exc. Vat)

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RS Pro
Gate Spring
Steel
200mm
-
-
-
-
-
No
RS PRO Steel Extension Spring, 34.4 mm x 12 mm OD
RS Stock No.: 751-893Brand: RS PRO

BD 8.932

BD 0.893 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
Extension Spring
Steel
34.4mm
76.7mm
12 mm
1.1mm
35.8N
0.72N/mm
DIN 17223, RoHS, BS 1408 CR3
RS PRO Stainless Steel Extension Spring, 27.7 mm x 5.5 mm OD
RS Stock No.: 821-447Brand: RS PRO

BD 7.528

BD 0.752 Each (In a Pack of 10) (Exc. Vat)

Add to basket
RS Pro
Extension Spring
Stainless Steel
27.7mm
80mm
5.5 mm
0.5mm
6.5N
0.11N/mm
DIN 17223, RoHS, BS 1408 CR3
RS PRO Steel Extension Spring, 25 mm x 5 mm OD
RS Stock No.: 751-691Brand: RS PRO

BD 6.827

BD 0.683 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
Extension Spring
Steel
25mm
80.8mm
5 mm
0.45mm
6.48N
0.11N/mm
DIN 17223, RoHS, BS 1408 CR3
RS PRO Steel Extension Spring, 75.4 mm x 11 mm OD
RS Stock No.: 751-887Brand: RS PRO

BD 10.272

BD 1.027 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
Extension Spring
Steel
75.4mm
224.4mm
11 mm
1mm
29.6N
0.17N/mm
RoHS, BS 1408 CR3, DIN 17223
RS PRO Stainless Steel Extension Spring, 30.4 mm x 6 mm OD
RS Stock No.: 821-475Brand: RS PRO

BD 7.528

BD 0.752 Each (In a Pack of 10) (Exc. Vat)

Add to basket
RS Pro
Extension Spring
Stainless Steel
30.4mm
86.6mm
6 mm
0.55mm
7.9N
0.12N/mm
BS 1408 CR3, DIN 17223, RoHS
RS PRO Steel Extension Spring, 35 mm x 7 mm OD
RS Stock No.: 751-770Brand: RS PRO

BD 7.273

BD 0.727 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
Extension Spring
Steel
35mm
101.5mm
7 mm
0.63mm
12.2N
0.16N/mm
DIN 17223, RoHS, BS 1408 CR3