1/4"-20 x 3/4" Grade 5 Zinc Finish Hex Cap Screw / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 0.720 INCHES MINIMUM AND 0.750 INCHES MAXIMUM FASTENER LENGTH: 0.720 INCHES MINIMUM AND 0.750 INCHES MAXIMUM HEAD STYLE: C1 HEXAGON HEAD HEIGHT: 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM WIDTH BETWEEN FLATS: 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM NOMINAL THREAD DIAMETER: 0.250 INCHES THREAD QUANTITY PER INCH: 20.0 MINIMUM TENSILE STRENGTH: 120000 POUNDS PER SQUARE INCH CHAMFER ANGLE: 15.0 DEGREES MINIMUM AND 30.0 DEGREES MAXIMUM MATERIAL: STEEL CORROSION RESISTING OVERALL SURFACE TREATMENT: ZINC OVERALL THREAD SERIES DESIGNATOR: UNC