Used on nsn 2355-01-567-4930 truck,bomb service. 2b thread class right-hand wrench size 1.625, inside diameter 1 in, grade c, 0.984 in thickness, type - heavy hex nut, unc
Used on 2350-01-577-0830 howitzer, medium, self-propelled. 2b thread class right-hand 32 thread quantity per inch nut, plain, hexagon black oxide surface treated