Cotter / Split Pin Stainless Steel (A2 / T304) 5 x 80 mm High Quality T304 (A2) Stainless steel Split pins are measured by the size of the hole they are inserted to. The split pin is a loose fit within the hole. The first dimension is the hole size (D), the second dimension is the total length under the eye of the shorter leg (L) Stainless fastener with two tines that are bent during installation, similar to a staple or rivet. With a half-circular cross section. DIN 94