1/2"-13 x 3" ASTM A307 Grade A Hot Dipped Galvanized Hex Bolt / HEAD HEIGHT: 0.302 INCHES MINIMUM AND 0.364 INCHES MAXIMUM NOMINAL THREAD DIAMETER: 0.500 INCHES THREAD QUANTITY PER INCH: 13 PART NAME ASSIGNED BY CONTROLLING AGENCY: BOLT, HEXAGON SPECIAL FEATURES: METRIC DIMENSIONS: 12.7X76.2 MILLIMETERS; CAGE 5YWZ2 IS OEM MATERIAL: STEEL OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A307, GRADE A ASSN STD SINGLE MATERIAL RESPONSE OVERALL SURFACE TREATMENT: ZINC OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM F2329 ASSN STD SINGLE TREATMENT RESPONSE OVERALL OR ASTM A153 ASSN STD SINGLE TREATMENT RESPONSE