Used on mrap - unique nsn - maxxpro cat i. 6h thread class right-hand nut-lock these are the dimentions in mm : width accross flats, 45.7; from point to point on the hexagon, 52.2; height, 18.3; outside diameter of shaft, 39.8; inside of shaft, 33.0; this has a countersink of 90 degrees
Used on mrap - unique nsn - 3 mrap variants. washer material is steel, carbon, 1010 thru 1025, spec astm A108 or A576, 2.500 dia bar, optional material steel, carbon, spec astm A36, 2.500 dia bar
