Cotter Pins
Cotter Pins hold parts in position and resist shear in machinery and equipment. Matching the pin type and size to the fit keeps components located and secure under working loads. South Coast Fasteners keeps Cotter Pins in stock and ready to ship, with fast 3-5 day shipping. Popular options include stainless cotter pins and extended prong cotter pins.
Materials and Finishes
Cotter Pins come in grades matched to the load, from carbon steel through high-strength alloy and corrosion-resistant stainless, with finishes from plain and zinc through hot-dip galvanized for outdoor and washdown service. Pair them with industries and Dowel Pins to round out the assembly.
How to Choose
Match the grade to the working load and the finish to the environment after locking in diameter, thread pitch, and length. Harsh or corrosive settings call for alloy or stainless.
Cotter Pins Industry Applications
Cotter Pins earn a place in shops, on jobsites, and on production floors. Food service and manufacturing join linkages and clevises with them, while automotive and marine & offshore lock castle nuts, clevises, and shafts with them. Hardened and ground dowels through cotter and clevis styles, sized by hole and length.
Frequently Asked Questions
What is a cotter pin?
A cotter pin is a split metal pin passed through a cross hole to lock a castle nut, clevis, or shaft, then spread to hold it in place.
How to install cotter pin?
A cotter pin passes through a cross-drilled hole to lock a castle nut, clevis, or pin. Size it by the hole diameter and the length needed to fold the legs back, then spread the legs to secure it.
How to measure a cotter pin?
A cotter pin is sized by the diameter of the hole it passes through and by length, measured along the legs from under the eye. Pick a length that lets the legs fold back fully.
Can I order in bulk or request a quote?
Yes. Stock covers small orders and full production runs. Reach out for a quote or product help.
Why Choose South Coast Fasteners?
We are a single source for fasteners, PPE, hand tools, cutting tools, abrasives, and industrial supplies, priced to compete and shipped fast by a crew that uses this gear every day.