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1/8 x 3 1/4 Tension Pin (Slotted Spring Pin) supports economical retention in hinges, pivots, and light mechanical joints. Use the three names together when cross-checking older maintenance notes, bills of material, or shop requests. A normal drilled hole at production tolerance is typically the economic advantage over precision reamed dowel-pin holes.

Common uses include maintenance spare kits, repair benches, and field replacement work, 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.

For repair operations, distributors, and OEM sourcing, Cold Headers can help match the item number, diameter, length, and standard. 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: 3 1/4 in. +/-0.030 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 3 1/4 in

Quantity

 N/A 1000

Package Type

 N/A Bulk

Search

 N/A TP.1/8.3 1/4

Addtional Information

Addtional Information

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