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Coiled Spiral Spring Pins


Coiled Spiral Spring Pins consist of 2 1/4 coils of spring steel or stainless steel and have swaged chamfers at each end. They are designed for plain drilled holes but countersinking makes insertion easier. The advantages of coiled pins are:

  • Improved shock absorption as the load is spread over more than one coil
  • Assembly is easier as the insertion force needed is lower
  • Coiled Spiral Spring Pins cannot interlock when in bulk

There are two strength duties, standard (ISO 8750) and heavy (ISO 8748). Standard duty is preferred for most applications, but heavy duty is recommended for applications in hardened steel components where maximum shear strength is essential.

Butler Fasteners in Nottingham supply Spiral Spring Pins in the following materials and finishes:


  • Spring Steel – CS 67 and DIN 17222, hardened and tempered to HV 420-520
  • Stainless Steel A2


  • Self Colour
  • Zinc Plated
  • Please Note

Where electrolytically applied finishes are used it is essential to de-embrittle the pins immediately after plating. For safety-critical applications non-electrolytic finishes should be used as the de-embrittlement process is not 100% reliable.

For more information contact us


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