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 PROHSN Code73202081

SR 161.00

SR 16.10 Each (In a Pack of 10) (ex 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 PROHSN Code73202089

SR 103.50

SR 10.35 Each (In a Pack of 10) (ex 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 PROHSN Code73202089

SR 115.00

SR 11.50 Each (In a Pack of 10) (ex 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 PROHSN Code73202085

SR 103.50

SR 10.35 Each (In a Pack of 10) (ex 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 PROHSN Code73202085

SR 109.25

SR 21.85 Each (In a Pack of 5) (ex 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 PROHSN Code73202085

SR 103.50

SR 10.35 Each (In a Pack of 10) (ex 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 PROHSN Code73202089

SR 103.50

SR 10.35 Each (In a Pack of 10) (ex 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 PROHSN Code73202081

SR 149.50

SR 14.95 Each (In a Pack of 10) (ex 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 PROHSN Code73202081

SR 66.70

SR 66.70 1 Pack of 5 (ex 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 PROHSN Code73202085

SR 161.00

SR 32.20 Each (In a Pack of 5) (ex 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 PROHSN Code73202085

SR 92.00

SR 9.20 Each (In a Pack of 10) (ex 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 PROHSN Code73202089

SR 103.50

SR 10.35 Each (In a Pack of 10) (ex 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 PROHSN Code73202089

SR 115.00

SR 11.50 Each (In a Pack of 10) (ex 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 PROHSN Code73202089

SR 59.80

SR 59.80 Each (ex 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 PROHSN Code73202081

SR 115.00

SR 11.50 Each (In a Pack of 10) (ex 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 PROHSN Code73202085

SR 103.50

SR 10.35 Each (In a Pack of 10) (ex 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 PROHSN Code73202089

SR 92.00

SR 9.20 Each (In a Pack of 10) (ex 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 PROHSN Code73202081

SR 126.50

SR 12.65 Each (In a Pack of 10) (ex 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 PROHSN Code73202085

SR 103.50

SR 10.35 Each (In a Pack of 10) (ex 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 PROHSN Code73202089

SR 92.00

SR 9.20 Each (In a Pack of 10) (ex 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