5/16"-18 x 2-1/2" Grade 8 Plain Finish Hex Cap Screw / THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 0.874 INCHES NOMINAL FASTENER LENGTH: 0.312 INCHES NOMINAL HEAD STYLE: C1 HEXAGON END ITEM IDENTIFICATION: 2355-01-567-4930, MINE PROTECTED CLEARANCE VEHICLE NOMINAL THREAD DIAMETER: 0.312 INCHES THREAD QUANTITY PER INCH: 18 PART NAME ASSIGNED BY CONTROLLING AGENCY: HEX CAP MATERIAL: STEEL PROPERTY CLASS 8.8 OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: SAE J429-GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL