1/4"-20 x 3/4" Grade 5 Zinc Finish Hex Cap Screw / THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 0.72 INCHES MINIMUM AND 0.75 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 PART NAME ASSIGNED BY CONTROLLING AGENCY: HEX CAP SCREW, 1/4"-20X3/4" SPECIAL FEATURES: WRENCH SIZE-7/16INCH, WEIGHT- 1.46, FULL THREAD- COARSE MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL THREAD SERIES DESIGNATOR: UNC