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Originally a ‘belt and braces’ device for industry for the prevention of unscrewing nuts from shafts and for restraining errant Clevis pins, the Cotter Pin has developed into numerous designs for newer applications in engineering.

Split cotter pins are crafted from robust wire, forming a semi-circular cross-section for added strength. Each pin features two separate legs connected at one end by a round head. When used, the pin is inserted into a pre-drilled hole—commonly found in shafts or bolts—until the head sits flush against the surface.

CZ108 self-colour Brass offers several benefits as a material for split cotter pins. As an alloy of copper and zinc, it is naturally resistant to rust and corrosion, making it ideal for use in environments where moisture or chemicals may be a concern. In addition, brass provides a bright, decorative appearance that is often preferred when visual appeal is important.

Other advantages include:

  • Malleability: Brass is easy to form and shape, which allows for precise manufacturing and ensures secure installation.
  • Non-magnetic: This property makes brass suitable for use in sensitive applications where magnetic interference must be avoided.
  • Durability: Brass fasteners remain strong yet flexible, offering a balance between holding power and the ability to remove or adjust components with minimal wear.

Brass Split Cotter Pins are available from 1/32" to 3/8" diameter, lengths of 1/4" to 6" as standard, but other sizes may be available made to order. Please contact us for further information.

Product Standard descriptionSplit Cotter Pins, Brass
Pinco Part Number300A

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