Pre-designed and ready to ship.
Buy now from min order to 999 springs - please use 'request quote' for 1000+ quantities.
Please use the filters to narrow down your extension spring search, if you can't find the perfect fit, please give us a call or fill in the custom quote details and we can discuss your requirements and application needs.
Part No. | Outside Dia (mm) | Free Length (mm) | Wire Dia. (mm) | Extended Length (mm) | Initial Tension (N) | Spring Rate (N/mm) | Price | Quantity | Check Price | |||||||||||||||||
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| 8.7 | 152.4 | 0.81 | 482.646 | 2.464 | 0.052 | £5.0400 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 31.8 | 0.91 | 60.552 | 3.404 | 0.827 | £2.4700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 38.1 | 0.91 | 78.224 | 3.404 | 0.594 | £2.4700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 50.8 | 0.91 | 113.567 | 3.404 | 0.38 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 63.5 | 0.91 | 148.91 | 3.404 | 0.279 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 76.2 | 0.91 | 184.253 | 3.404 | 0.221 | £3.4600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 101.6 | 0.91 | 254.94 | 3.404 | 0.155 | £3.9600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 127 | 0.91 | 325.626 | 3.404 | 0.12 | £4.5100 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 152.4 | 0.91 | 396.313 | 3.404 | 0.098 | £5.0400 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 31.8 | 1.02 | 53.872 | 4.548 | 1.439 | £2.4700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 38.1 | 1.02 | 68.81 | 4.548 | 1.037 | £2.4700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 50.8 | 1.02 | 98.685 | 4.548 | 0.665 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 63.5 | 1.02 | 128.56 | 4.548 | 0.489 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 76.2 | 1.02 | 158.436 | 4.548 | 0.387 | £3.4600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 101.6 | 1.02 | 218.186 | 4.548 | 0.273 | £3.9600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 127 | 1.02 | 277.937 | 4.548 | 0.211 | £4.5100 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 152.4 | 1.02 | 337.688 | 4.548 | 0.172 | £5.0400 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 31.8 | 1.22 | 45.562 | 7.471 | 3.786 | £2.4700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 38.1 | 1.22 | 57.144 | 7.471 | 2.746 | £2.4700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 50.8 | 1.22 | 80.307 | 7.471 | 1.772 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 63.5 | 1.22 | 103.471 | 7.471 | 1.308 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 76.2 | 1.22 | 126.634 | 7.471 | 1.037 | £3.4600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 101.6 | 1.22 | 172.962 | 7.471 | 0.733 | £3.9600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 127 | 1.22 | 219.289 | 7.471 | 0.567 | £4.5100 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 8.7 | 152.4 | 1.22 | 265.616 | 7.471 | 0.462 | £5.0400 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 31.8 | 0.91 | 63.801 | 3.128 | 0.683 | £2.4700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 38.1 | 0.91 | 84.159 | 3.128 | 0.475 | £2.4700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 50.8 | 0.91 | 124.876 | 3.128 | 0.296 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 63.5 | 0.91 | 165.592 | 3.128 | 0.214 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 76.2 | 0.91 | 206.308 | 3.128 | 0.168 | £3.4600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 88.9 | 0.91 | 247.025 | 3.128 | 0.138 | £3.9600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 101.6 | 0.91 | 287.741 | 3.128 | 0.118 | £3.9600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 127 | 0.91 | 369.174 | 3.128 | 0.09 | £4.5100 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 152.4 | 0.91 | 450.607 | 3.128 | 0.073 | £5.0400 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 31.8 | 1.02 | 56.519 | 4.184 | 1.182 | £2.4700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 38.1 | 1.02 | 73.545 | 4.184 | 0.826 | £2.4700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 50.8 | 1.02 | 107.597 | 4.184 | 0.516 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 63.5 | 1.02 | 141.649 | 4.184 | 0.375 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 76.2 | 1.02 | 175.701 | 4.184 | 0.294 | £3.4600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 88.9 | 1.02 | 209.754 | 4.184 | 0.242 | £3.9600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 101.6 | 1.02 | 243.806 | 4.184 | 0.206 | £3.9600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 127 | 1.02 | 311.91 | 4.184 | 0.158 | £4.5100 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 152.4 | 1.02 | 380.015 | 4.184 | 0.129 | £5.0400 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 31.8 | 1.22 | 47.415 | 6.889 | 3.078 | £2.4700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 38.1 | 1.22 | 60.336 | 6.889 | 2.169 | £2.4700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 50.8 | 1.22 | 86.178 | 6.889 | 1.363 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 63.5 | 1.22 | 112.019 | 6.889 | 0.994 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 76.2 | 1.22 | 137.861 | 6.889 | 0.782 | £3.4600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 88.9 | 1.22 | 163.703 | 6.889 | 0.645 | £3.9600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 101.6 | 1.22 | 189.545 | 6.889 | 0.548 | £3.9600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 127 | 1.22 | 241.228 | 6.889 | 0.422 | £4.5100 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 152.4 | 1.22 | 292.912 | 6.889 | 0.343 | £5.0400 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 31.8 | 1.42 | 42.279 | 10.498 | 6.98 | £2.4700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 38.1 | 1.42 | 52.93 | 10.498 | 4.955 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 50.8 | 1.42 | 74.232 | 10.498 | 3.136 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 63.5 | 1.42 | 95.534 | 10.498 | 2.294 | £3.4600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 76.2 | 1.42 | 116.835 | 10.498 | 1.808 | £3.4600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 88.9 | 1.42 | 138.137 | 10.498 | 1.493 | £3.9600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 101.6 | 1.42 | 159.439 | 10.498 | 1.271 | £3.9600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 127 | 1.42 | 202.043 | 10.498 | 0.979 | £4.5100 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 9.5 | 152.4 | 1.42 | 244.647 | 10.498 | 0.797 | £5.0400 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 38.1 | 1.02 | 81.496 | 3.618 | 0.584 | £2.4700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 50.8 | 1.02 | 124.931 | 3.618 | 0.342 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 63.5 | 1.02 | 168.365 | 3.618 | 0.242 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 76.2 | 1.02 | 211.799 | 3.618 | 0.187 | £3.4600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 88.9 | 1.02 | 255.233 | 3.618 | 0.152 | £4.5100 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 101.6 | 1.02 | 298.667 | 3.618 | 0.129 | £4.5100 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 127 | 1.02 | 385.535 | 3.618 | 0.098 | £5.0400 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 152.4 | 1.02 | 472.403 | 3.618 | 0.079 | £5.7200 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 177.8 | 1.02 | 559.271 | 3.618 | 0.066 | £6.4400 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 38.1 | 1.22 | 65.817 | 5.977 | 1.51 | £2.4700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 50.8 | 1.22 | 97.712 | 5.977 | 0.892 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 63.5 | 1.22 | 129.607 | 5.977 | 0.633 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 76.2 | 1.22 | 161.502 | 5.977 | 0.49 | £3.4600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 88.9 | 1.22 | 193.397 | 5.977 | 0.4 | £4.5100 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 101.6 | 1.22 | 225.292 | 5.977 | 0.338 | £4.5100 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 127 | 1.22 | 289.081 | 5.977 | 0.258 | £5.0400 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 152.4 | 1.22 | 352.871 | 5.977 | 0.209 | £5.7200 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 177.8 | 1.22 | 416.661 | 5.977 | 0.175 | £6.4400 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 38.1 | 1.42 | 56.943 | 9.145 | 3.397 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 50.8 | 1.42 | 82.409 | 9.145 | 2.025 | £3.4600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 63.5 | 1.42 | 107.875 | 9.145 | 1.443 | £3.4600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 76.2 | 1.42 | 133.341 | 9.145 | 1.12 | £3.9600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 88.9 | 1.42 | 158.808 | 9.145 | 0.916 | £4.5100 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 101.6 | 1.42 | 184.274 | 9.145 | 0.774 | £4.5100 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 127 | 1.42 | 235.206 | 9.145 | 0.592 | £5.0400 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 152.4 | 1.42 | 286.138 | 9.145 | 0.479 | £5.7200 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 177.8 | 1.42 | 337.071 | 9.145 | 0.402 | £6.4400 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 38.1 | 1.63 | 51.393 | 13.12 | 6.909 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 50.8 | 1.63 | 72.908 | 13.12 | 4.154 | £3.4600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 63.5 | 1.63 | 94.423 | 13.12 | 2.97 | £3.9600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 76.2 | 1.63 | 115.938 | 13.12 | 2.311 | £3.9600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 88.9 | 1.63 | 137.453 | 13.12 | 1.892 | £4.5100 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 101.6 | 1.63 | 158.968 | 13.12 | 1.601 | £4.5100 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 127 | 1.63 | 201.998 | 13.12 | 1.225 | £5.0400 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 152.4 | 1.63 | 245.028 | 13.12 | 0.992 | £5.7200 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 11.1 | 177.8 | 1.63 | 288.058 | 13.12 | 0.833 | £6.4400 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 12.7 | 38.1 | 1.42 | 59.928 | 8.072 | 2.589 | £2.9700 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 12.7 | 50.8 | 1.42 | 90.461 | 8.072 | 1.425 | £3.4600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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| 12.7 | 63.5 | 1.42 | 120.994 | 8.072 | 0.983 | £3.9600 | Max: 999 Min: 1 Step: 1 | Quantity Pricing
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Compression | Extension | Spring Lengths
| Compression Springs | Extension Springs | |
| Working Length |
Its is not advisable to use more than 80% of the maximum possible deflection. |
We recommend a safe extended length for our springs |
| End Coils | Up to 0.5mm wire - closed only. Over 0.5mm wire - closed & ground |
Full loops are similar to outside diameter. Loop end positions may vary. |
| Tolerances | British Standard - BS 1726: Part1:Grade 2 |
British Standard - BS 1726: Part2:Grade 2 |
| Materials | Carbon Steel Wire / Music Wire - British Standard BS5216, Grade ND3. | |
| Winding | Springs are normally right wound, however this may vary. | |
| Finish | Springs are stress relieved at appropriate temperatures, and stock springs are supplied in a plain finish, lightly oiled. |
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Notifications