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Spring Tension Pins

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Spring Tension / Selloc Pins

Spring Tension Selloc Roll PinsSpring Tension Pins or Selloc Pins consist of a single coil of spring steel or stainless steel with chamfered ends and an open slot wide enough to enable the pin to reduce in diameter as it is driven into a hole. They are designed for plain drilled holes but a countersink makes assembly easier.

It is possible to increase the shear strength of slotted pins by inserting a smaller diameter tension pin into a larger one. The larger pin must be inserted first, then the smaller pin taking care that the slot is between 90 and 180 away from the slot in the larger pin.

Butler Fasteners in Nottingham supply Spring Tension / Selloc Pins in the following materials and finishes:


  • Spring Steel - CS70 / AISI 1070 / C67
  • Stainless Steel A2 - AISI 304


  • 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 click here to download Spring Tension Pin / Selloc Pin brochure (pdf - 174KB) or click here to contact us.


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