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, 59 mm
RS PRO, 59 mm
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RS Stock No.751-916BrandRS PRO

BD 13.224

BD 1.322 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
-
-
59mm
98.6mm
-
1.2mm
9.34N
1.35N/mm
-
RS PRO, 50 mm
RS PRO, 50 mm
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RS Stock No.751-865BrandRS PRO

BD 8.774

BD 0.878 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
-
-
50mm
142.2mm
-
0.9mm
2.8N
0.23N/mm
-
RS PRO Steel Extension Spring, 44.6 mm x 9 mm OD
RS Stock No.751-837BrandRS PRO

BD 9.665

BD 0.967 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
Steel
Extension Spring
44.6mm
130.2mm
9mm
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.821-453BrandRS PRO

BD 9.092

BD 0.910 Each (In a Pack of 10) (Exc. Vat)

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

BD 9.441

BD 1.889 Each (In a Pack of 5) (Exc. Vat)

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RS Pro
-
-
77.8mm
97.4mm
-
2.5mm
48.48N
13.7N/mm
-
RS PRO Stainless Steel Extension Spring, 35 mm x 7 mm OD
RS Stock No.821-504BrandRS PRO

BD 8.329

BD 0.833 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
Stainless Steel
Extension Spring
35mm
101.5mm
7mm
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.751-663BrandRS PRO

BD 8.583

BD 0.858 Each (In a Pack of 10) (Exc. Vat)

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

BD 12.398

BD 1.240 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
-
-
39.7mm
58.4mm
-
1.6mm
17.13N
5.02N/mm
-
RS PRO Steel Extension Spring, 87.7 mm x 17 mm OD
RS Stock No.751-950BrandRS PRO

BD 6.065

BD 6.065 1 Pack of 5 (Exc. Vat)

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

BD 14.019

BD 2.804 Each (In a Pack of 5) (Exc. Vat)

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RS Pro
-
-
85.5mm
133.1mm
-
2.5mm
35.02N
4.27N/mm
-
RS PRO Stainless Steel Extension Spring, 24.5 mm x 3.5 mm OD
RS Stock No.821-431BrandRS PRO

BD 7.947

BD 0.794 Each (In a Pack of 10) (Exc. Vat)

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

BD 8.138

BD 0.814 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
-
-
44.1mm
73.8mm
-
0.9mm
5.62N
1.06N/mm
-
RS PRO Steel Extension Spring, 32.6 mm x 9 mm OD
RS Stock No.751-821BrandRS PRO

BD 9.982

BD 0.998 Each (In a Pack of 10) (Exc. Vat)

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

BD 5.881

BD 5.881 Each (Exc. Vat)

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RS Pro
Steel
Gate Spring
200mm
-
-
-
-
-
No
RS PRO, 34.4 mm
RS PRO, 34.4 mm
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RS Stock No.751-893BrandRS PRO

BD 9.855

BD 0.986 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
-
-
34.4mm
76.7mm
-
1.1mm
5.35N
0.72N/mm
-
RS PRO Stainless Steel Extension Spring, 27.7 mm x 5.5 mm OD
RS Stock No.821-447BrandRS PRO

BD 8.329

BD 0.833 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
Stainless Steel
Extension Spring
27.7mm
80mm
5.5mm
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.751-691BrandRS PRO

BD 7.502

BD 0.750 Each (In a Pack of 10) (Exc. Vat)

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

BD 10.936

BD 1.093 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
-
-
75.4mm
224.4mm
-
1mm
4.27N
0.17N/mm
-
RS PRO Stainless Steel Extension Spring, 30.4 mm x 6 mm OD
RS Stock No.821-475BrandRS PRO

BD 8.329

BD 0.833 Each (In a Pack of 10) (Exc. Vat)

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RS Pro
Stainless Steel
Extension Spring
30.4mm
86.6mm
6mm
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.751-770BrandRS PRO

BD 7.884

BD 0.789 Each (In a Pack of 10) (Exc. Vat)

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