Cotter Pins

Professionals across many industries rely on cotter pins to ensure their products and equipment remain safe and efficient. At FMW Fasteners, we supply an assortment of cotter pins to support personal and commercial projects of all sizes. Browse our inventory to find solutions you can trust. 

Applications of Cotter Pins

Cotter pins are user-friendly, mild steel fasteners that easily secure various components like bolts and nuts. They come in many configurations, including hair pins and wire snap cotter pins. You'll usually find them built in a narrow U shape with a circular top. Once you've inserted one or both ends into a pre-made hole, you can bend the pin to ensure it cannot fall out from vibrations or be removed. This pin type is a necessary addition for many applications, including: 

  • Engines
  • Sailboat rigging 
  • Airplane landing gear 
  • Automotive components 

Our Cotter Pin Collection 

When you're in the market for premium cotter pins, FMW Fasteners should be your first stop. We carry quality pins you can count on to support your needs. Most of our options are built from plain steel materials, giving you the durability and strength to prevent bolts from loosening over time. Our team prides itself on stocking a variety of pins available in unique sizes, lengths and diameters. Some of the popular cotter pin dimensions we carry include: 

  • 1/32"
  • 3/64"
  • 1/16"
  • 5/64"
  • 3/32"
  • 7/64"
  • 1/8"
  • 9/64"
  • 5/32"

At FMW Fasteners, we make it easy to acquire as many or as few cotter pins as necessary. Once you find the size you need, you'll have the flexibility to specify custom amounts — whether you want to buy cotter pins in bulk or need only a few — for a seamless buying process. Qualifying orders may receive fast shipping for free.

Purchase Cotter Pins From FMW Fasteners

FMW Fasteners offers high-quality cotter pins, ready to secure critical components and keep your most important projects moving forward. Our experts are available to discuss your projects and walk you through our product inventory to help you find the right tool for your situation. 

Trust in the team at FMW Fasteners to have your back. Shop our cotter pin collection and purchase yours online today!