M8-1.25 x 20mm ISO 7380 Hex Drive Class 10.9 Zinc Finish Alloy Steel Button Socket Cap Screw / THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 1.3 MILLIMETERS NOMINAL FASTENER LENGTH: 19.6 MILLIMETERS MINIMUM AND 20.4 MILLIMETERS MAXIMUM HEAD STYLE: C30 BUTTON HEAD DIAMETER: 13.6 MILLIMETERS MINIMUM AND 14.0 MILLIMETERS MAXIMUM HEAD HEIGHT: 4.1 MILLIMETERS MINIMUM AND 4.4 MILLIMETERS MAXIMUM INTERNAL DRIVE STYLE: D5 HEXAGON END ITEM IDENTIFICATION: MRAP-COUGAR NOMINAL THREAD DIAMETER: 8.0 MILLIMETERS WIDTH ACROSS FLATS: 5.7 MILLIMETERS NOMINAL THREAD PITCH IN MILLIMETERS: 0.2 MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL THREAD SERIES DESIGNATOR: M