5/8"-11 x 4-1/2" Grade 8 Yellow Zinc Finish Hex Cap Screw / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 1.500 INCHES NOMINAL FASTENER LENGTH: 4.400 INCHES MINIMUM AND 4.500 INCHES MAXIMUM HEAD STYLE: C1 HEXAGON HEAD HEIGHT: 0.378 INCHES MINIMUM AND 0.403 INCHES MAXIMUM WIDTH BETWEEN FLATS: 0.922 INCHES MINIMUM AND 0.938 INCHES MAXIMUM SHOULDER DIAMETER: 0.617 INCHES MINIMUM AND 0.625 INCHES MAXIMUM SHOULDER LENGTH: 3.000 INCHES NOMINAL END ITEM IDENTIFICATION: FPII COUGAR NOMINAL THREAD DIAMETER: 0.625 INCHES THREAD QUANTITY PER INCH: 11 MINIMUM TENSILE STRENGTH: 150000 POUNDS PER SQUARE INCH SHOULDER SHAPE: ROUND GRIP PART NAME ASSIGNED BY CONTROLLING AGENCY: 5/8-11X4.5, HHCS GRADE 8, YELLOW ZINC COLOR: YELLOW OVERALL MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL THREAD SERIES DESIGNATOR: UNC