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.751-916BrandRS PRO

12.302 OMR

1.231 OMR Each (In a Pack of 10) (ex VAT)

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RS Pro
Steel
Extension Spring
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.751-865BrandRS PRO

8.161 OMR

0.816 OMR Each (In a Pack of 10) (ex VAT)

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RS Pro
Steel
Extension Spring
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.751-837BrandRS PRO

8.952 OMR

0.896 OMR Each (In a Pack of 10) (ex VAT)

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RS Pro
Steel
Extension Spring
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.821-453BrandRS PRO

8.404 OMR

0.840 OMR Each (In a Pack of 10) (ex VAT)

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RS Pro
Stainless Steel
Extension Spring
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.121-359BrandRS PRO

9.105 OMR

1.821 OMR Each (In a Pack of 5) (ex VAT)

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RS Pro
Steel
Extension Spring
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.821-504BrandRS PRO

7.673 OMR

0.768 OMR Each (In a Pack of 10) (ex VAT)

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RS Pro
Stainless Steel
Extension Spring
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.751-663BrandRS PRO

7.917 OMR

0.792 OMR Each (In a Pack of 10) (ex VAT)

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RS Pro
Steel
Extension Spring
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.751-944BrandRS PRO

11.449 OMR

1.145 OMR Each (In a Pack of 10) (ex VAT)

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RS Pro
Steel
Extension Spring
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.751-950BrandRS PRO

5.822 OMR

5.822 OMR 1 Pack of 5 (ex VAT)

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RS Pro
Steel
Extension Spring
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.121-365BrandRS PRO

13.642 OMR

2.728 OMR Each (In a Pack of 5) (ex VAT)

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RS Pro
Steel
Extension Spring
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.821-431BrandRS PRO

7.369 OMR

0.737 OMR Each (In a Pack of 10) (ex VAT)

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RS Pro
Stainless Steel
Extension Spring
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.751-859BrandRS PRO

7.552 OMR

0.755 OMR Each (In a Pack of 10) (ex VAT)

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RS Pro
Steel
Extension Spring
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.751-821BrandRS PRO

9.196 OMR

0.920 OMR Each (In a Pack of 10) (ex VAT)

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RS Pro
Steel
Extension Spring
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.894-6803BrandRS PRO

5.579 OMR

5.579 OMR Each (ex VAT)

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

9.074 OMR

0.907 OMR Each (In a Pack of 10) (ex VAT)

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RS Pro
Steel
Extension Spring
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.821-447BrandRS PRO

7.673 OMR

0.768 OMR Each (In a Pack of 10) (ex VAT)

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RS Pro
Stainless Steel
Extension Spring
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.751-691BrandRS PRO

6.943 OMR

0.694 OMR Each (In a Pack of 10) (ex VAT)

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RS Pro
Steel
Extension Spring
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.751-887BrandRS PRO

10.536 OMR

1.053 OMR Each (In a Pack of 10) (ex VAT)

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RS Pro
Steel
Extension Spring
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.821-475BrandRS PRO

7.673 OMR

0.768 OMR Each (In a Pack of 10) (ex VAT)

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RS Pro
Stainless Steel
Extension Spring
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.751-770BrandRS PRO

7.430 OMR

0.743 OMR Each (In a Pack of 10) (ex VAT)

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