3/4"-10 x 20" Grade 5 Zinc Finish Hex Cap Screw / THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 1.750 INCHES NOMINAL FASTENER LENGTH: 1.900 INCHES NOMINAL HEAD STYLE: C1 HEXAGON HEAD HEIGHT: 0.455 INCHES MINIMUM AND 0.483 INCHES MAXIMUM WIDTH BETWEEN FLATS: 1.100 INCHES MINIMUM AND 1.125 INCHES MAXIMUM NOMINAL THREAD DIAMETER: 0.750 INCHES THREAD QUANTITY PER INCH: 10 MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL THREAD SERIES DESIGNATOR: UNC