quantity of 100 Aerospace Quality Cotter Pins, approximately 3/16 x 1/2. Meets Mil-Spec MS24665-436, NSN 5315-00-236-8368. Made by National Aerospace Standards. Please see exact Specs: ABMZ Diameter 0.146 inches minimum and 0.150 inches maximum ABNA Underloop Length 0.688 inches minimum and 0.875 inches maximum BBDT Point Type Extended prong mitre end CQFM Hardness Rating 55.0 rockwell superficial 15-N minimum overall and 67.0 rockwell superficial 15-N maximum overall MATT Material Steel comp 302 overall or steel comp 304 overall MDCL Material Document AND Classification 66 fed std all material responses overall SFTT Surface Treatment Passivate overall WRD15 13542