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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 | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 12.7 | 76.2 | 1.42 | 151.528 | 8.072 | 0.75 | £4.51 | | Quantity Pricing
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| 12.7 | 88.9 | 1.42 | 182.061 | 8.072 | 0.607 | £5.04 | | Quantity Pricing
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| 12.7 | 101.6 | 1.42 | 212.594 | 8.072 | 0.509 | £5.04 | | Quantity Pricing
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| 12.7 | 127 | 1.42 | 273.661 | 8.072 | 0.385 | £5.72 | | Quantity Pricing
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| 12.7 | 152.4 | 1.42 | 334.727 | 8.072 | 0.31 | £6.44 | | Quantity Pricing
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| 12.7 | 177.8 | 1.42 | 395.794 | 8.072 | 0.259 | £7.25 | | Quantity Pricing
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| 12.7 | 38.1 | 1.63 | 53.755 | 11.616 | 5.194 | £2.97 | | Quantity Pricing
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| 12.7 | 50.8 | 1.63 | 78.92 | 11.616 | 2.892 | £3.46 | | Quantity Pricing
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| 12.7 | 63.5 | 1.63 | 104.084 | 11.616 | 2.004 | £3.96 | | Quantity Pricing
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| 12.7 | 76.2 | 1.63 | 129.248 | 11.616 | 1.533 | £4.51 | | Quantity Pricing
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| 12.7 | 88.9 | 1.63 | 154.413 | 11.616 | 1.241 | £5.04 | | Quantity Pricing
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| 12.7 | 101.6 | 1.63 | 179.577 | 11.616 | 1.043 | £5.04 | | Quantity Pricing
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| 12.7 | 127 | 1.63 | 229.906 | 11.616 | 0.79 | £5.72 | | Quantity Pricing
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| 12.7 | 152.4 | 1.63 | 280.235 | 11.616 | 0.636 | £6.44 | | Quantity Pricing
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| 12.7 | 177.8 | 1.63 | 330.563 | 11.616 | 0.532 | £7.25 | | Quantity Pricing
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| 12.7 | 38.1 | 1.83 | 49.709 | 16.001 | 9.649 | £3.46 | | Quantity Pricing
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| 12.7 | 50.8 | 1.83 | 71.422 | 16.001 | 5.432 | £3.46 | | Quantity Pricing
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| 12.7 | 63.5 | 1.83 | 93.135 | 16.001 | 3.78 | £3.96 | | Quantity Pricing
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| 12.7 | 76.2 | 1.83 | 114.849 | 16.001 | 2.898 | £4.51 | | Quantity Pricing
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| 12.7 | 88.9 | 1.83 | 136.562 | 16.001 | 2.35 | £5.04 | | Quantity Pricing
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| 12.7 | 101.6 | 1.83 | 158.275 | 16.001 | 1.976 | £5.04 | | Quantity Pricing
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| 12.7 | 127 | 1.83 | 201.701 | 16.001 | 1.499 | £5.72 | | Quantity Pricing
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| 12.7 | 152.4 | 1.83 | 245.128 | 16.001 | 1.208 | £6.44 | | Quantity Pricing
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| 12.7 | 177.8 | 1.83 | 288.554 | 16.001 | 1.011 | £7.25 | | Quantity Pricing
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| 12.7 | 38.1 | 2.03 | 46.943 | 21.315 | 16.872 | £3.46 | | Quantity Pricing
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| 12.7 | 50.8 | 2.03 | 66.343 | 21.315 | 9.6 | £3.46 | | Quantity Pricing
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| 12.7 | 63.5 | 2.03 | 85.742 | 21.315 | 6.708 | £3.96 | | Quantity Pricing
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| 12.7 | 76.2 | 2.03 | 105.141 | 21.315 | 5.155 | £4.51 | | Quantity Pricing
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| 12.7 | 88.9 | 2.03 | 124.541 | 21.315 | 4.186 | £5.04 | | Quantity Pricing
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| 12.7 | 101.6 | 2.03 | 143.94 | 21.315 | 3.524 | £5.04 | | Quantity Pricing
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| 12.7 | 127 | 2.03 | 182.739 | 21.315 | 2.677 | £5.72 | | Quantity Pricing
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| 12.7 | 152.4 | 2.03 | 221.537 | 21.315 | 2.158 | £6.44 | | Quantity Pricing
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| 12.7 | 177.8 | 2.03 | 260.336 | 21.315 | 1.808 | £7.25 | | Quantity Pricing
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| 14.3 | 38.1 | 1.42 | 61.175 | 7.23 | 2.193 | £2.97 | | Quantity Pricing
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| 14.3 | 50.8 | 1.42 | 97.517 | 7.23 | 1.083 | £3.46 | | Quantity Pricing
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| 14.3 | 63.5 | 1.42 | 133.86 | 7.23 | 0.719 | £3.96 | | Quantity Pricing
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| 14.3 | 76.2 | 1.42 | 170.202 | 7.23 | 0.538 | £4.51 | | Quantity Pricing
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| 14.3 | 88.9 | 1.42 | 206.544 | 7.23 | 0.43 | £5.04 | | Quantity Pricing
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| 14.3 | 101.6 | 1.42 | 242.887 | 7.23 | 0.358 | £5.04 | | Quantity Pricing
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| 14.3 | 127 | 1.42 | 315.571 | 7.23 | 0.268 | £5.72 | | Quantity Pricing
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| 14.3 | 152.4 | 1.42 | 388.256 | 7.23 | 0.215 | £6.44 | | Quantity Pricing
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| 14.3 | 177.8 | 1.42 | 460.941 | 7.23 | 0.179 | £7.25 | | Quantity Pricing
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| 14.3 | 203.2 | 1.42 | 533.625 | 7.23 | 0.153 | £8.17 | | Quantity Pricing
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| 14.3 | 228.6 | 1.42 | 606.31 | 7.23 | 0.134 | £9.30 | | Quantity Pricing
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| 14.3 | 254 | 1.42 | 678.994 | 7.23 | 0.119 | £10.25 | | Quantity Pricing
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| 14.3 | 38.1 | 1.63 | 54.902 | 10.425 | 4.343 | £2.97 | | Quantity Pricing
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| 14.3 | 50.8 | 1.63 | 84.271 | 10.425 | 2.18 | £3.46 | | Quantity Pricing
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| 14.3 | 63.5 | 1.63 | 113.64 | 10.425 | 1.455 | £3.96 | | Quantity Pricing
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| 14.3 | 76.2 | 1.63 | 143.009 | 10.425 | 1.092 | £4.51 | | Quantity Pricing
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| 14.3 | 88.9 | 1.63 | 172.377 | 10.425 | 0.874 | £5.04 | | Quantity Pricing
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| 14.3 | 101.6 | 1.63 | 201.746 | 10.425 | 0.729 | £5.04 | | Quantity Pricing
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| 14.3 | 127 | 1.63 | 260.484 | 10.425 | 0.547 | £5.72 | | Quantity Pricing
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| 14.3 | 152.4 | 1.63 | 319.222 | 10.425 | 0.437 | £6.44 | | Quantity Pricing
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| 14.3 | 177.8 | 1.63 | 377.959 | 10.425 | 0.365 | £7.25 | | Quantity Pricing
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| 14.3 | 203.2 | 1.63 | 436.697 | 10.425 | 0.313 | £8.17 | | Quantity Pricing
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| 14.3 | 228.6 | 1.63 | 495.434 | 10.425 | 0.273 | £9.30 | | Quantity Pricing
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| 14.3 | 254 | 1.63 | 554.172 | 10.425 | 0.243 | £10.25 | | Quantity Pricing
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| 14.3 | 38.1 | 1.83 | 50.753 | 14.394 | 7.963 | £3.46 | | Quantity Pricing
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| 14.3 | 50.8 | 1.83 | 75.619 | 14.394 | 4.06 | £3.46 | | Quantity Pricing
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| 14.3 | 63.5 | 1.83 | 100.485 | 14.394 | 2.724 | £3.96 | | Quantity Pricing
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| 14.3 | 76.2 | 1.83 | 125.351 | 14.394 | 2.05 | £4.51 | | Quantity Pricing
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| 14.3 | 88.9 | 1.83 | 150.217 | 14.394 | 1.643 | £5.04 | | Quantity Pricing
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| 14.3 | 101.6 | 1.83 | 175.083 | 14.394 | 1.371 | £5.04 | | Quantity Pricing
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| 14.3 | 127 | 1.83 | 224.815 | 14.394 | 1.03 | £5.72 | | Quantity Pricing
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| 14.3 | 152.4 | 1.83 | 274.547 | 14.394 | 0.825 | £6.44 | | Quantity Pricing
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| 14.3 | 177.8 | 1.83 | 324.279 | 14.394 | 0.688 | £7.25 | | Quantity Pricing
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| 14.3 | 203.2 | 1.83 | 374.012 | 14.394 | 0.59 | £8.17 | | Quantity Pricing
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| 14.3 | 228.6 | 1.83 | 423.744 | 14.394 | 0.516 | £9.30 | | Quantity Pricing
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| 14.3 | 254 | 1.83 | 473.476 | 14.394 | 0.459 | £10.25 | | Quantity Pricing
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| 14.3 | 38.1 | 2.03 | 47.891 | 19.226 | 13.746 | £3.46 | | Quantity Pricing
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| 14.3 | 50.8 | 2.03 | 69.724 | 19.226 | 7.112 | £3.46 | | Quantity Pricing
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| 14.3 | 63.5 | 2.03 | 91.558 | 19.226 | 4.797 | £3.96 | | Quantity Pricing
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| 14.3 | 76.2 | 2.03 | 113.391 | 19.226 | 3.619 | £4.51 | | Quantity Pricing
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| 14.3 | 88.9 | 2.03 | 135.225 | 19.226 | 2.905 | £5.04 | | Quantity Pricing
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| 14.3 | 101.6 | 2.03 | 157.058 | 19.226 | 2.427 | £5.04 | | Quantity Pricing
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| 14.3 | 127 | 2.03 | 200.725 | 19.226 | 1.825 | £5.72 | | Quantity Pricing
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| 14.3 | 152.4 | 2.03 | 244.392 | 19.226 | 1.463 | £6.44 | | Quantity Pricing
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| 14.3 | 177.8 | 2.03 | 288.059 | 19.226 | 1.221 | £7.25 | | Quantity Pricing
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| 14.3 | 203.2 | 2.03 | 331.726 | 19.226 | 1.047 | £8.17 | | Quantity Pricing
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| 14.3 | 228.6 | 2.03 | 375.392 | 19.226 | 0.917 | £9.30 | | Quantity Pricing
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| 14.3 | 254 | 2.03 | 419.059 | 19.226 | 0.815 | £10.25 | | Quantity Pricing
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| 15.9 | 38.1 | 1.63 | 54.402 | 9.434 | 4.051 | £2.97 | | Quantity Pricing
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| 15.9 | 50.8 | 1.63 | 88.666 | 9.434 | 1.744 | £3.46 | | Quantity Pricing
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| 15.9 | 63.5 | 1.63 | 122.93 | 9.434 | 1.111 | £3.96 | | Quantity Pricing
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| 15.9 | 76.2 | 1.63 | 157.194 | 9.434 | 0.815 | £4.51 | | Quantity Pricing
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| 15.9 | 88.9 | 1.63 | 191.458 | 9.434 | 0.644 | £5.04 | | Quantity Pricing
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| 15.9 | 101.6 | 1.63 | 225.722 | 9.434 | 0.532 | £5.72 | | Quantity Pricing
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| 15.9 | 127 | 1.63 | 294.25 | 9.434 | 0.395 | £6.44 | | Quantity Pricing
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| 15.9 | 152.4 | 1.63 | 362.778 | 9.434 | 0.314 | £7.25 | | Quantity Pricing
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| 15.9 | 177.8 | 1.63 | 431.306 | 9.434 | 0.26 | £8.17 | | Quantity Pricing
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| 15.9 | 203.2 | 1.63 | 499.834 | 9.434 | 0.223 | £9.30 | | Quantity Pricing
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| 15.9 | 228.6 | 1.63 | 568.362 | 9.434 | 0.194 | £10.25 | | Quantity Pricing
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| 15.9 | 254 | 1.63 | 636.89 | 9.434 | 0.172 | £10.25 | | Quantity Pricing
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| 15.9 | 38.1 | 1.83 | 50.591 | 13.047 | 7.312 | £3.46 | | Quantity Pricing
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| 15.9 | 50.8 | 1.83 | 79.142 | 13.047 | 3.222 | £3.46 | | Quantity Pricing
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| 15.9 | 63.5 | 1.83 | 107.693 | 13.047 | 2.067 | £3.96 | | Quantity Pricing
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| 15.9 | 76.2 | 1.83 | 136.244 | 13.047 | 1.521 | £4.51 | | Quantity Pricing
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| 15.9 | 88.9 | 1.83 | 164.796 | 13.047 | 1.203 | £5.04 | | Quantity Pricing
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| 15.9 | 101.6 | 1.83 | 193.347 | 13.047 | 0.995 | £5.72 | | Quantity Pricing
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| 15.9 | 127 | 1.83 | 250.449 | 13.047 | 0.74 | £6.44 | | 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. |
|