M8-1.25 x 40mm DIN 933 Class 10.9 Plain Finish Hex Cap Screw / THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 39.5 MILLIMETERS MINIMUM AND 40.5 MILLIMETERS MAXIMUM FASTENER LENGTH: 40.5 MILLIMETERS NOMINAL HEAD STYLE: C1 HEXAGON HEAD HEIGHT: 6.1 MILLIMETERS MINIMUM AND 6.4 MILLIMETERS MAXIMUM WIDTH BETWEEN FLATS: 12.7 MILLIMETERS MINIMUM AND 13.0 MILLIMETERS MAXIMUM NOMINAL THREAD DIAMETER: 8.0 MILLIMETERS THREAD PITCH IN MILLIMETERS: 1.2 EXTERNAL THREAD TOLERANCE CLASS: 6G PART NAME ASSIGNED BY CONTROLLING AGENCY: M8-1.25 X 40MM 10.9 DIN 933 FULL THREAD PLAIN HEX CAP SCREW MATERIAL: STEEL OVERALL THREAD SERIES DESIGNATOR: M