5/8"-11 x 3-1/4" Grade 8 Plain Finish Hex Cap Screw / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 1.500 INCHES NOMINAL FASTENER LENGTH: 3.250 INCHES NOMINAL HEAD STYLE: C1 HEXAGON HEAD HEIGHT: 0.378 INCHES MINIMUM AND 0.444 INCHES MAXIMUM WIDTH BETWEEN FLATS: 0.906 INCHES MINIMUM AND 0.938 INCHES MAXIMUM NOMINAL THREAD DIAMETER: 0.625 INCHES THREAD QUANTITY PER INCH: 11 MINIMUM TENSILE STRENGTH: 150000 POUNDS PER SQUARE INCH PART NAME ASSIGNED BY CONTROLLING AGENCY: 5/8"-11X3-1/4" PLAIN FINISH SAE J429 GRADE 8 HEX CAP SCREW MATERIAL: STEEL OVERALL THREAD SERIES DESIGNATOR: UNC