navy special project shape spherical, for screw size 7/16, 1/2 in, material type steel, black oxide steel, type case-hardened steel, sperical piece set, radius 1-1/2 in, male indied diameter 17/32 in, female inside diameter 9/16 in, thickness 029 in, thickness 033 in, rockwell hardness C48, male outside diameter 1-1/8 in diameterm female outside diameter 1-1/8 in diameter, correction 2 in,
