3/8"-16 x 1-1/4" ASTM A574 Hex Drive Black Oxide Finish Alloy Steel Socket Cap Screw / THREAD CLASS: 3A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 1.210 INCHES MINIMUM AND 1.250 INCHES MAXIMUM FASTENER LENGTH: 1.210 INCHES MINIMUM AND 1.250 INCHES MAXIMUM HEAD STYLE: C44 FILLISTER HEAD DIAMETER: 0.550 INCHES MINIMUM AND 0.562 INCHES MAXIMUM HEAD HEIGHT: 0.368 INCHES MINIMUM AND 0.375 INCHES MAXIMUM INTERNAL DRIVE STYLE: D5 HEXAGON END ITEM IDENTIFICATION: MRAP - COUGAR AND 2355-01-567-4930 TRUCK, BOMB SERVICE NOMINAL THREAD DIAMETER: 0.375 INCHES WIDTH ACROSS FLATS: 0.312 INCHES NOMINAL THREAD QUANTITY PER INCH: 16 MINIMUM TENSILE STRENGTH: 180000 POUNDS PER SQUARE INCH HARDNESS RATING: 39.0 ROCKWELL C MINIMUM OVERALL AND 45.0 ROCKWELL C MAXIMUM PART NAME ASSIGNED BY CONTROLLING AGENCY: 3/8 INCH - 16 X 1 - 1/1/4 INCH BLACK OXIDE ALLOY STEEL SOCKET CAP SCREW COLOR: BLACK OVERALL MATERIAL: STEEL OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A574 ASSN STD SINGLE MATERIAL RESPONSE OVERALL SURFACE TREATMENT: OXIDE OVERALL THREAD SERIES DESIGNATOR: UNRC