M12-1.75 x 40mm DIN 6921S Plain Finish Class 100 Steel Hex Serrated Flange Bolt / THREAD CLASS: 12 THREAD DIRECTION: RIGHT-HAND FASTENER LENGTH: 40.0 MILLIMETERS NOMINAL HEAD STYLE: C7 HEXAGON EXTENDED WASHER END ITEM IDENTIFICATION: MRAP - COMMON NSN - USED ON 4 MRAP VARIANTS AND 1 OTHER WEAPON SYSTEM; MRAP - MAXXPRO DASH ISS W/OGPK AND W/CROWS PART NAME ASSIGNED BY CONTROLLING AGENCY: BOLT,M12X1.75X40MM HEX FLANGE SURFACE TREATMENT: PHOSPHATE OVERALL THREAD SERIES DESIGNATOR: M