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Cotter Pins

Cotter pins or split pins are often used to lock fasteners in a secure position. MW Components produces stock and custom cotter pins for commercial use, railcar, military, aerospace, defense, and more. We offer commercial-grade cotter pins configured to ASME B18.8.1 specifications, wedge-fast cotter pins, and military cotter pins like MS24665 and MS9245, and NAS parts. Both imperial and metric sizes are available for order. We produce multiple styles and configurations including, extended prongs, hammerlocks, chisel points, tapered points, humped, tee heads, and self-locking cotter pins.

Looking for other fasteners and pins like hitch pins or spring pins? We produce stock and custom pins and wire forms for a variety of purposes from aerospace and automotive to agriculture, transportation, and more. We offer prototyping for customer-provided drawings and can produce from a single sample up to millions of parts.

Request a quote for a custom part, or shop our inventory of in-stock parts.


Custom Yes Request a Custom Quote
Stock & Standard No

Custom Manufacturing

Custom Pins

Our precision machining produces custom cotter pins, hitch pins, other pins, wire fasteners, and custom wire forms made to your blueprints. We work with various materials, finishes, coatings, styles, and sizes to produce the precise component your project requires.

Custom capabilities for our custom pins include prototyping and various coatings or surface treatments including, plating, passivation, cleaning, polishing, and heat treatments. For your convenience, we also offer custom packaging and JIT (Just In Time) delivery as requested. We produce custom parts for various applications and industries, including aerospace, defense, agriculture, medical, commercial, and others. We are ISO 9001 certified and offer both military and commercial-grade parts. Certifications verifying traceability and compliance are available as needed.

Send us your specs or configure a part.

Request a Custom Quote
Cotter Pin - Split Pin

Cotter Pins Manufacturing

Cotter pins, hitch pins, wire fasteners, and other pins and wire-formed products are produced at our Western Wire facility in Fenton, MO. Western Wire specializes in custom products, tight tolerances, and fast turnaround. We produce a wide range of wire forms and pins to precise customer specifications.

Our production capabilities are extensive and include sizing capabilities from 0.01" to 0.625", a vast raw material inventory, various coating and surface treatment options, Just In Time Delivery, ISO9001 certification, and more. Whether you need a single prototype, to millions of parts, we offer precision and quality for each and every part we produce.

Manufacturing quality components

Related Manufacturing Services

In addition to standard manufacturing services, we offer various optional services to assist you in developing the best product for your application or end-use.

  • Custom Packaging
  • Just In Time Delivery
  • Metal Stamping
  • Prototyping
  • Tooling
  • Wire Forming

Finishing Services

MW specializes in custom component manufacturing and offers a variety of optional finishing services to complete your custom component. Our finishes and surface treatments for custom pins include plating, passivation, cleaning and polishing, and heat treatments. Below is a list of the finishing services and treatments most often requested for custom pins.

  • Cleaning & Polishing
  • Coating & Dyeing
  • Deburring
  • Heat Treatments
  • Plating
  • Hardening & Tempering

Quality Materials

Our cotter pins are produced from a variety of standard and specialty materials. Some common materials we work with are listed below; however, our manufacturing capabilities are vast and we can work with practically any hard-drawn material. For information on custom materials and manufacturing processes, contact us for a custom quote.

  • Aluminum
  • Beryllium Copper
  • Brass
  • Copper
  • Phosphorous Bronze
  • Platinum
  • Stainless Steel
  • Steel
  • Titanium

Have Questions? 

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