M12-1.75 x 40mm DIN 7991 Hex Drive Class 10.9 Plain Finish Alloy Steel Flat Socket Cap Screw / THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 40.0 MILLIMETERS NOMINAL FASTENER LENGTH: 40.0 MILLIMETERS NOMINAL HEAD STYLE: C50 FLAT COUNTERSUNK HEAD DIAMETER: 24.0 MILLIMETERS NOMINAL INTERNAL DRIVE STYLE: D5 HEXAGON END ITEM IDENTIFICATION: MRAP - COUGAR CAT1 A2 NOMINAL THREAD DIAMETER: 12.0 MILLIMETERS WIDTH ACROSS FLATS: 8.0 MILLIMETERS NOMINAL MINIMUM TENSILE STRENGTH: 835 MEGAPASCALS THREAD PITCH IN MILLIMETERS: 1.75 COUNTERSINK ANGLE: 90.0 DEGREES NOMINAL SPECIAL FEATURES: HARDNESS (HRC) 32-39 COLOR: BLACK OVERALL MATERIAL: STEEL PROPERTY CLASS 10.9 OVERALL PROPRIETARY CHARACTERISTICS: NPAC SURFACE TREATMENT: OXIDE OVERALL THREAD SERIES DESIGNATOR: M