A spring-type cotter made to be reusable.Pivot Point hair pin cotters are made exclusively to our exactspecifications. Designed to be strong and secure, these fastenersare economical and widely used. It is important to select thecorrect size because misuse causes fatigue and will result inloss of the fastener. Consult our use chart below and ask usabout proper hole size. We'll be glad to help. Made from hard drawn MB spring wire, zincplated and baked or stainless type 302. Hair Pin Cotter Specs Cross Reference - Replaces HAIR-1 .047 .594 221 HAIR-2 .054 .969 223 HAIR-4 .072 1.188 213 HAIR-5 .091 1.625 203 HAIR-6 .091 2.000 228 HAIR-8 .120 2.375 211 HAIR-10 .148 2.750 210 HAIR-12 .177 3.500 229 "Unless otherwise noted, all dimensions are for reference only."