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Hairpin Cotter Pin (External Hitch Pin Clip)

Hairpin cotter pins—also known as "external hitch pin clips" or "hairpin clips"—are spring-lock metal fasteners designed for quick and secure engagement with grooved shafts, clevis pins, or axles.

Shaped like a bent wire hairpin, the dual spring legs clamp tightly onto the pin or shaft, providing tool-free installation and removal.

This clip is widely used in trailer safety locks, agricultural machinery, outdoor gear, and industrial fixtures where fast, repeatable fastening is essential.

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Product Features

  • Installation: Spring legs clip into shaft groove for fast locking and easy removal

  • Material: SUS304 Stainless Steel

  • Suitable shaft diameter: Ø2mm to Ø12mm

  • Excellent elastic retention; resists loosening under vibration

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Applications

  • Trailer hitch pin retention

  • Quick-locking clevis pins in agricultural machinery

  • Detachable locating pins in industrial machines

  • Outdoor gear and DIY structure assembly

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Customization & Notes

  • Compatible with through-hole or blind-hole assemblies

  • Low-volume orders supported

  • Matching support for OEM part numbers available

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