.177 x 3.50 Zinc Hair Pin Cotter

Hair Pin Cotters (or “R Clips”) are a spring-type cotter made to be reusable. Hair Pin Cotters are generally meant to be used in through-holes while Hair Pin Clips are generally meant to be used on a groove.


Designed to be strong and secure, these fasteners are economical and widely used. It is important to select the correct size Hair Pins Cotter because misuse causes fatigue and will result in loss of the fastener.


Made from hard drawn MB spring wire, zinc plated and baked or Stainless Steel (300 Series).

Type: Zinc Plated
Wire Diameter [in]: 0.177
Use on Shaft Size [in]: 7/8 to 1
Overall Length [in]: 3.500
WW Number Wire Diameter: 229
Approx. Weight per 100 Pieces: 5.58 lbs
Material: MB Spring Wire
Finish: Zinc Plated