1/2"-13 x 1-1/2" Phosphate and Oil Finish SAE J429 Grade 8 Hex Flange Bolt / THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 1.25 MILLIMETERS NOMINAL FASTENER LENGTH: 1.54 MILLIMETERS NOMINAL HEAD STYLE: C117 CHAMFER FLANGE HEAD INSIDE DIAMETER: 0.75 MILLIMETERS NOMINAL HEAD HEIGHT: 0.51 MILLIMETERS NOMINAL WIDTH BETWEEN FLATS: 0.500 MILLIMETERS NOMINAL NOMINAL THREAD DIAMETER: 0.500 MILLIMETERS THREAD PITCH IN MILLIMETERS: 13.0 PART NAME ASSIGNED BY CONTROLLING AGENCY: SCREW, CAP, HEXAGON HEAD SPECIAL FEATURES: FLANGE DIA 1.07MM, FLANGE THICKNESS 0.08MM, HEXAGON HEIGHT 0.34MM MATERIAL: STEEL OVERALL