5/8"-18 x 6" Grade 8 Yellow Zinc Finish Hex Cap Screw / THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 6.000 INCHES NOMINAL FASTENER LENGTH: 6.000 INCHES NOMINAL HEAD STYLE: C1 HEXAGON END ITEM IDENTIFICATION: 2320-01-531-6425; MRAP BUFFALO MK2A2 NOMINAL THREAD DIAMETER: 0.6250 INCHES THREAD QUANTITY PER INCH: 18 PART NAME ASSIGNED BY CONTROLLING AGENCY: HEX HEAD CAP SCREW SPECIAL FEATURES: MATERIAL: THROUGH-HARDENED MEDIUM CARBON ALLOY STEEL; GRADE 8 MATERIAL: STEEL OVERALL THREAD SERIES DESIGNATOR: UNF