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PHONE HOTLINE: 800-346-4296 E-MAIL: sales@hayn.com
Contact Us
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Cotter Pins

Hayn Cotter Pins are 304 stainless steel split pins used to lock clevis pins in place across the full range of Hayn toggle, adjuster, and rigging hardware. 

Strong Where It Matters

Hayn Cotter Pins

A cotter pin is the last line of defense against clevis pin withdrawal, and using the correct size for the application is essential — an undersized pin won't fill the hole properly, and an oversized one won't seat. Hayn stocks cotter pins in nine size and grip length combinations, from 1/16" diameter by 1/2" grip through 3/16" diameter by 1-1/2" grip, with corresponding part numbers cross-referenced directly to their matching Hayn clevis pins for straightforward specification. Manufactured from 304 stainless steel for corrosion resistance in marine environments. 
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332234C

Cotter Pins

304 Stainless Steel

Cotter pins are 304 stainless steel. Available in 1/16″ to 3/16″ and varying grip lengths.

Cotter Pins
Part # Size Ø Grip Length Weight lbs.
11612C-1 1/16″ 1/2″ 0.001
116112C-1 1/16″ 1 1/2″ 0.002
33234C-1 3/32″ 3/4″ 0.002
332114C-1 3/32″ 1 1/4″ 0.003
181C-1 1/8″ 1″ 0.006
18212C-1 1/8″ 2 1/2″ 0.01
183C-1 1/8″ 3″ 0.01
532114C-1 5/32″ 1 1/4″ 0.01
316112C-1 3/16″ 1 1/2″ 0.01
Engineered In America Every Hayn fitting is designed and manufactured at our facility in Rocky Hill, Connecticut — the same American workmanship that has set the standard for stainless steel rigging hardware since 1950.
Cold-Worked Production Hayn fittings are cold-worked, not cast. That distinction matters: the cold-working process refines grain structure, increases fatigue resistance, and produces a fundamentally stronger component — one built to perform when the load comes on it.
Precision Manufacturing Our Rocky Hill production floor runs CNC vertical mills, CNC lathes, large-capacity mill-turn centers, and waterjet cutting systems — all configured to produce hardware that meets exact specifications, every time.
75+ Years of Excellence Hayn has been engineering and manufacturing marine and architectural rigging hardware since 1950. That track record isn't just history, it's the design knowledge, failure data, and continuous improvement that goes into every product we make. 
  • Type 316 stainless steel construction for superior saltwater corrosion resistance
  • Manufactured in Rocky Hill, Connecticut to Hayn's proprietary tolerances
  • Precision-machined using advanced CNC manufacturing equipment



  • Engineered for seamless integration in marine and architectural rigging systems

  • Short lead times on both standard and custom components

  • Backed by 75 years of marine and architectural hardware expertise

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Let's Build Something Together

 Hayn has been engineering precision rigging hardware since 1950. So whatever your project demands, you're building with hardware that's been proven at sea and on structure for generations. 
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