THIS IS FOR PACK OF 6 COTTER PINS Cotter Pin: Hairpin, Steel, Zinc Plated Cotter Pin, System of Measurement Inch, Cotter Pin Type Hairpin, Basic Material Steel, Fastener Finish Zinc Plated, Pin Dia. 3/16 In., Fastener Length 3-3/8 In. Meets/Exceeds ANSI/ASME B 18.8.1