M6-1.0 x 20mm DIN 933 Class 10.9 Zinc Finish Hex Cap Screw / THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 20.0 MILLIMETERS NOMINAL FASTENER LENGTH: 20.0 MILLIMETERS NOMINAL HEAD STYLE: C1 HEXAGON HEAD HEIGHT: 4.0 MILLIMETERS NOMINAL WIDTH BETWEEN FLATS: 10.0 MILLIMETERS NOMINAL END ITEM IDENTIFICATION: END ITEM NSN: 2355-20-001-9922 NOMINAL THREAD DIAMETER: 6.0 MILLIMETERS MINIMUM TENSILE STRENGTH: 145000 POUNDS PER SQUARE INCH HARDNESS RATING: 32.0 ROCKWELL C MINIMUM OVERALL AND 39.0 ROCKWELL C MAXIMUM THREAD PITCH IN MILLIMETERS: 1.0 EXTERNAL THREAD TOLERANCE CLASS: 6G MATERIAL: STEEL PROPERTY CLASS 10.9 OVERALL SURFACE TREATMENT: ZINC OVERALL THREAD SERIES DESIGNATOR: M