M6-1.0 x 55mm DIN 931 Class 10.9 Yellow Zinc Finish Hex Cap Screw / THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 55.0 MILLIMETERS NOMINAL FASTENER LENGTH: 59.0 MILLIMETERS NOMINAL HEAD STYLE: C1 HEXAGON HEAD HEIGHT: 4.0 MILLIMETERS NOMINAL WIDTH BETWEEN FLATS: 9.8 MILLIMETERS NOMINAL END ITEM IDENTIFICATION: MASTIFF 3 NOMINAL THREAD DIAMETER: 6.0 MILLIMETERS THREAD PITCH IN MILLIMETERS: 1.0 EXTERNAL THREAD TOLERANCE CLASS: 6G MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL THREAD SERIES DESIGNATOR: M