M20-2.5 x 100mm DIN 931 Class 8.8 Zinc Finish Hex Cap Screw / THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 46.0 MILLIMETERS NOMINAL FASTENER LENGTH: 99.30 MILLIMETERS MINIMUM AND 100.70 MILLIMETERS MAXIMUM HEAD STYLE: C1 HEXAGON HEAD HEIGHT: 12.26 MILLIMETERS MINIMUM AND 12.72 MILLIMETERS MAXIMUM WIDTH BETWEEN FLATS: 29.67 MILLIMETERS MINIMUM AND 30.00 MILLIMETERS MAXIMUM NOMINAL THREAD DIAMETER: 20.0 MILLIMETERS THREAD PITCH IN MILLIMETERS: 2.5 SPECIAL FEATURES: CLASS 8.8 STEEL MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL THREAD SERIES DESIGNATOR: M