1/2"-13 x 2" ASTM A307 Grade A Hot Dipped Galvanized Hex Bolt / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 1.250 INCHES NOMINAL FASTENER LENGTH: 1.940 INCHES MINIMUM AND 2.040 INCHES MAXIMUM HEAD STYLE: C1 HEXAGON HEAD HEIGHT: 0.302 INCHES MINIMUM AND 0.364 INCHES MAXIMUM WIDTH BETWEEN FLATS: 0.725 INCHES MINIMUM AND 0.750 INCHES MAXIMUM NOMINAL THREAD DIAMETER: 0.500 INCHES THREAD QUANTITY PER INCH: 13 EXTERNAL THREAD TOLERANCE CLASS: 2A PART NAME ASSIGNED BY CONTROLLING AGENCY: HEXAGON BOLT SPECIAL FEATURES: WEIGHT: 1.32LBS 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 A513, GALVANIZED HOT DIP ZINC, ASSN STD SINGLE TREATMENT RESPONSE THREAD SERIES DESIGNATOR: UNC