M8-1.25 x 55mm DIN 933 Class 8.8 Yellow Zinc Finish Hex Cap Screw / THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 55.0 MILLIMETERS NOMINAL FASTENER LENGTH: 55.0 MILLIMETERS NOMINAL HEAD STYLE: C1 HEXAGON HEAD HEIGHT: 5.1 MILLIMETERS MINIMUM AND 5.5 MILLIMETERS MAXIMUM WIDTH BETWEEN FLATS: 12.7 MILLIMETERS MINIMUM AND 13.0 MILLIMETERS MAXIMUM END ITEM IDENTIFICATION: 2355-01-598-5731 NOMINAL THREAD DIAMETER: 8.0 MILLIMETERS THREAD PITCH IN MILLIMETERS: 1.25 EXTERNAL THREAD TOLERANCE CLASS: 6G COLOR: YELLOW OVERALL MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL AND DICHROMATE THREAD SERIES DESIGNATOR: M