M16-2.00, Hex Head Cap Screw, 55 mm Fastener Length, Class 10.9 Steel, PK 10/ THREAD CLASS: 6H THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 55.0 MILLIMETERS NOMINAL FASTENER LENGTH: 55.0 MILLIMETERS NOMINAL HEAD STYLE: C1 HEXAGON HEAD HEIGHT: 10.0 MILLIMETERS NOMINAL WIDTH BETWEEN FLATS: 24.0 MILLIMETERS NOMINAL END ITEM IDENTIFICATION: COURGAR AMBULANCE-MRAP NOMINAL THREAD DIAMETER: 16.0 MILLIMETERS MINIMUM TENSILE STRENGTH: 150800 POUNDS PER SQUARE INCH HARDNESS RATING: 34.0 ROCKWELL C NOMINAL OVERALL THREAD PITCH IN MILLIMETERS: 2.0 PART NAME ASSIGNED BY CONTROLLING AGENCY: HEX CAP SCREW, STL, M16 X 2 55 MM SPECIAL FEATURES: TENSILE STRENGTH 150,800 PSI; ROCKWELL HARDNESS C32 - C38 COLOR: YELLOW OVERALL MATERIAL: STEEL COMP 1090 OVERALL SURFACE TREATMENT: ZINC ALLOY OVERALL THREAD SERIES DESIGNATOR: M