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1/8 x 2 1/4 Tension Pin (Slotted Spring Pin) helps retain mating parts through spring force against the hole wall. Tension pin, slotted spring pin, and roll pin describe the same slotted self-retaining pin style. The published OD range of 0.131-0.135 in. is larger than the 0.125-0.129 in. recommended hole range by design.

Common uses include agricultural equipment linkages, outdoor mechanisms, and repair assemblies, where the pin retains parts without a threaded fastener. For worn precision holes, 0.001 Oversize Dowel Pins may be the better repair path than using a spring pin.

Since 1962, Cold Headers has helped industrial buyers locate specialty pin and socket-product configurations. Review the verified OD, hole-size, shear, and length-tolerance data before matching this pin to a drawing or service record.

Technical Highlights

  • Nominal Diameter: 1/8 in.
  • Length: 2 1/4 in. +/-0.025 in.
  • Pin OD Before Insertion: 0.135 / 0.131 in. (max/min)
  • Recommended Hole Size: 0.129 / 0.125 in. (max/min)
  • Min Double Shear: 1,875 lbs
  • Material: Spring Steel (cold rolled, hardened and tempered)
  • Ends: Chamfered both ends
  • Style: Slotted (also called spring pin / roll pin)
  • Dimensional Standard: ASME B18.8.2

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.

Unit of Measure

Specifications

Brands

 N/A Cold Headers, Inc.

Diameter

 N/A 1/8 in

Length

 N/A 2 1/4 in

Quantity

 N/A 1000

Package Type

 N/A Bulk

Search

 N/A TP.1/8.2 1/4

Addtional Information

Addtional Information

 N/A They are self fitting in varying size holes and in out of alignment applications.