5/16"-18 x 2-3/4" Grade 8 Yellow Zinc Finish Hex Cap Screw / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 0.87 INCHES NOMINAL FASTENER LENGTH: 2.69 INCHES MINIMUM AND 2.75 INCHES MAXIMUM HEAD STYLE: C1 HEXAGON HEAD HEIGHT: 0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM WIDTH BETWEEN FLATS: 0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM END ITEM IDENTIFICATION: 2320-01-529-2249; MRAP BUFFALO MK2A2 NOMINAL THREAD DIAMETER: 0.3125 INCHES THREAD QUANTITY PER INCH: 18 PART NAME ASSIGNED BY CONTROLLING AGENCY: BOLT, HEX CAP COLOR: YELLOW OVERALL MATERIAL: STEEL OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: AISI 1020 ASSN STD SINGLE MATERIAL RESPONSE OVERALL SURFACE TREATMENT: CHROMATE ZINC OVERALL THREAD SERIES DESIGNATOR: UNC