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Extension Springs

Extension springs, also called tension springs, are helical coil springs designed to extend and store energy when pulled. They are characterised by their tightly wound coils of wire with a loop or hook on either side for secure attachment. Unlike compression springs, which resist pushing forces, an extension spring elongates upon applying force and attempts to return to its original length. Tension springs are typically made from flexible metals, ensuring robust flexibility and corrosion resistance. Our extension spring types come in varied diameters, spring rates, extended lengths, and loads to meet your various needs. 

Why Buy Extension Springs? 

Investing in extension springs offers unparalleled benefits across various applications. They are indispensable for their durability and flexibility, absorbing shock and vibration. Purchasing a quality extension spring reduces the need for frequent replacements. Additionally, their affordability, durability, and ease of installation make them a favourite choice for applications. 

Check Our Range of Extension Springs (Based on Materials):

Our diverse range of extension springs includes varieties designed to meet users’ needs across various applications. Our collection includes:

  • Stainless Steel Extension Springs – These springs offer robust strength, felicity, and rust resistance. They are ideal for applications exposed to harsh conditions, such as marine, extreme temperatures, chemical, and corrosive environments. 
  • Steel Extension Springs – A steel extension spring is a versatile and cost-effective option for general-purpose applications.  It offers good strength and durability and is common in furniture, toys, and various mechanical assemblies.
  • Chrome Vanadium Electric Steel – These springs are manufactured from a specialised alloy steel known for its high strength, toughness, and fatigue resistance.  They are suitable for demanding applications requiring repeated stretching and high stress.   

Typical Uses of Extension Springs:

Extension springs find applications in several products and industries, including:

  • Garage Doors
  • Consumer Goods
  • Medical Devices
  • Industrial Machinery
  • Trampolines
  • Farm Machinery
  • Automotive Assemblies.

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RS Pro
Rohs Verified
751-893, RS Pro
108 In Stock
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10 +
£ 1.20
RS Pro
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121-359, RS Pro
88 In Stock
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5 +
£ 2.17
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121-400, RS Pro
118 In Stock
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£ 5.21
RS Pro
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751-786, RS Pro
748 In Stock
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£ 0.98
RS Pro
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751-821, RS Pro
358 In Stock
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£ 1.22
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751-922, RS Pro
2158 In Stock
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£ 1.31
RS Pro
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751-714, RS Pro
288 In Stock
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£ 0.95
RS Pro
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751-758, RS Pro
818 In Stock
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£ 1.14
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751-938, RS Pro
1338 In Stock
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£ 1.60
RS Pro
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121-337, RS Pro
358 In Stock
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£ 1.33
RS Pro
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751-809, RS Pro
1678 In Stock
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£ 1.02
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751-837, RS Pro
1088 In Stock
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£ 1.19
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751-843, RS Pro
51 In Stock
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£ 13.98
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751-871, RS Pro
1288 In Stock
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£ 1.16
RS Pro
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121-393, RS Pro
48 In Stock
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£ 3.98
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121-416, RS Pro
28 In Stock
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£ 7.78
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751-764, RS Pro
59 In Stock
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£ 10.15
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751-691, RS Pro
858 In Stock
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£ 0.92
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121-343, RS Pro
256 In Stock
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£ 3.97
Pressmaster
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4300-3735, Pressmaster
22 In Stock
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£ 6.89
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121-321, RS Pro
723 In Stock
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£ 2.43
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751-679, RS Pro
778 In Stock
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£ 1.05
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751-736, RS Pro
118 In Stock
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£ 0.94
RS Pro
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751-887, RS Pro
1108 In Stock
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£ 1.34
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121-387, RS Pro
14 In Stock
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£ 16.08
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New Items
New items
821-469, RS Pro

821-469, RS Pro

Stainless Steel Extension Springs Extension springs are coiled attached by two components from both ends of the spring. When pulled apart the extension springs pull them back together again. The springs tension can be adapted depending on the applications load requirements. Features and Benefits Absorb and store energy Pulling force resistance Wound springs to oppose extension Available in various sizes Applications include: Automotive interiors and exteriors Garage door assemblies Vise-grip pliers Trampolines Washing devices Farm machinery Standards Material to DIN 17224 No. 1 4310 or BS2056 EN58A with a right hand helix All dimensions conform to DIN 2097 (Grade 2)
New items
894-6800, RS Pro

894-6800, RS Pro

Gate / Door Springs Bright zinc steel RS 894-6803 Black epoxy steel RS 894-6806 , 894-6800
New items
RS_436-0570, RS PRO

RS_436-0570, RS PRO

RS PRO Gate Spring, 254 mm These self-closing gate springs are part of our reliable and stringently tested RS PRO range. They're designed to be installed on gates to ensure they automatically swing shut. With a free length of 254 mm, these springs have adjustable tension so they can be compressed or extended to suit your span. Simply tightening them with a wrench until the desired action is achieved. Made from high-quality steel with a black epoxy finish, the springs are durable and resistant to corrosion. For these reasons, they're well-suited to tough environmental conditions as they can stand up to bad weather and general wear-and-tear. These springs comply with the requirements of the ANSI/ESD S20.20:2014 and BS EN 61340-5-1:2007 Electrostatic Control Standards. Thanks to their versatile construction, they can be installed on both left-opening and right-opening gates. Features and Benefits • Self-closing gate spring • Free length of 254 mm • Made from high-quality steel • Black epoxy finish for resistance to wear-and-tear • Adjustable tension • Conforms to ANSI/ESD S20.20:2014 and BS EN 61340-5-1:2007 Electrostatic Control Standards RS PRO RS PRO is our own brand range and brings you a wide range of high-quality, great value products offering you more choice. Trusted by engineers all over the world, every part of every RS PRO product has been rigorously tested against demanding industry standards they’re only given the RS PRO Seal of Approval if we’re confident of their exceptional quality, which means you can be confident too.
New items
751-893, RS Pro

751-893, RS Pro

Music Wire Extension Springs Manufactured from high tensile strength piano/music wire, with a right-hand (clockwise) helix and looped ends. Features and Benefits Attached at both ends Springs absorb and store energy Create resistance to pulling force Initial tension manipulation can achieve individual requirements Wound to oppose extension Applications: Automotive interiors and exteriors Garage door assemblies Vise-grip pliers Carburetors Trampolines Washing devices Farm machinery Standards Materials to DIN17223 Class C or BS1408 CR3. Dimensions conform to DIN2097 Grade 2. Oiled finish.
New items
121-400, RS Pro

121-400, RS Pro

Music Wire Extension Springs Manufactured from high tensile strength piano/music wire, with a right-hand (clockwise) helix and looped ends. Features and Benefits Attached at both ends Springs absorb and store energy Create resistance to pulling force Initial tension manipulation can achieve individual requirements Wound to oppose extension Applications: Automotive interiors and exteriors Garage door assemblies Vise-grip pliers Carburetors Trampolines Washing devices Farm machinery Standards Materials to DIN17223 Class C or BS1408 CR3. Dimensions conform to DIN2097 Grade 2. Oiled finish.
New items
121-359, RS Pro

121-359, RS Pro

Music Wire Extension Springs Manufactured from high tensile strength piano/music wire, with a right-hand (clockwise) helix and looped ends. Features and Benefits Attached at both ends Springs absorb and store energy Create resistance to pulling force Initial tension manipulation can achieve individual requirements Wound to oppose extension Applications: Automotive interiors and exteriors Garage door assemblies Vise-grip pliers Carburetors Trampolines Washing devices Farm machinery Standards Materials to DIN17223 Class C or BS1408 CR3. Dimensions conform to DIN2097 Grade 2. Oiled finish.
New items
821-510, RS Pro

821-510, RS Pro

Stainless Steel Extension Springs Extension springs are coiled attached by two components from both ends of the spring. When pulled apart the extension springs pull them back together again. The springs tension can be adapted depending on the applications load requirements. Features and Benefits Absorb and store energy Pulling force resistance Wound springs to oppose extension Available in various sizes Applications include: Automotive interiors and exteriors Garage door assemblies Vise-grip pliers Trampolines Washing devices Farm machinery Standards Material to DIN 17224 No. 1 4310 or BS2056 EN58A with a right hand helix All dimensions conform to DIN 2097 (Grade 2)
FAQs
We offer free shipping for orders over £200 if delivery is in the UK. All other orders in the UK, shipping from £7.99 depending on the weight and measurement. Mainland Europe shipping charges start from £25. For all other countries shipping charges start from £50 for products like Extension Springs and all others.
You can email us directly at sales@enrgtech.co.uk or via our website for any queries regarding Extension Springs or any other product.
This depends on the Extension Springs individual product and information that can be found on our website.
Yes, we offer special discounts on orders above £200 for Extension Springs and all other products.
UK orders normally take between 2/3 working days. International orders normally take between 3/5 working days for all products including Extension Springs.
Yes. We keep updating our stock frequently and if a product like Extension Springs is not in stock then we will let you know.