1/2"-13 x 4-1/2" SAE J429 Grade 8 Yellow Zinc Finish Steel Tap Bolt / THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 4.5 INCHES NOMINAL HEAD STYLE: C1 HEXAGON NOMINAL THREAD DIAMETER: 0.5 INCHES CRITICALITY CODE JUSTIFICATION: FEAT PART NAME ASSIGNED BY CONTROLLING AGENCY: 1/2-13X4.5 HEX TAP BOLT FUL THRD GR8 ZINCYELLOW SPECIAL FEATURES: FIT RESTRICTION; WEIGHT: 0.24 POUNDS MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL