Material b-1113, armco or equiv 0.375 diameter by 0.910 lg per mil-i-11695a; finish electroless nickle plate 0.0009to 0.0011 thick per mil-c-26074, cl 1; diameter 0.371 to 0.372; thickness 0.340 to 0.360; 2 holes tap 4-40nc-2b thd; bore through 0.094 to 0.095 to counterbore of 0.161 diameter to depth of 0.156