M6-1.0 x 25mm DIN 7991 Hex Drive Class 10.9 Black Oxide Finish Alloy Steel Flat Socket Cap Screw / THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 18.0 MILLIMETERS NOMINAL FASTENER LENGTH: 25.0 MILLIMETERS NOMINAL HEAD STYLE: C50 FLAT COUNTERSUNK HEAD DIAMETER: 11.8 MILLIMETERS NOMINAL INTERNAL DRIVE STYLE: D5 HEXAGON END ITEM IDENTIFICATION: MASTIFF 3 NOMINAL THREAD DIAMETER: 6.0 MILLIMETERS WIDTH ACROSS FLATS: 4.1 MILLIMETERS NOMINAL THREAD PITCH IN MILLIMETERS: 1.0 EXTERNAL THREAD TOLERANCE CLASS: 6G COUNTERSINK ANGLE: 90.0 DEGREES NOMINAL COLOR: BLACK OVERALL MATERIAL: STEEL OVERALL SURFACE TREATMENT: OXIDE OVERALL THREAD SERIES DESIGNATOR: M