Safety Pin System of Measurement Inch Wire Diameter 0.091 in Shank Length 3 7/16 in Pin Diameter 3/8 in Pin Type Snap Material Steel Material Grade/Class Grade 1018 Finish Zinc Plated Outside Diameter Tolerance +0.368/-0.373 in Shank Length Tolerance +0.125/-0.000 in Usable Length 3 in Product Type Safety Pin Wire Shape Square Wire Type Single Height 11/16 in Includes Not Applicable Material Quality Standards Not Applicable Dimensional Standards Not Applicable