MATERIAL - STEEL FED-STD-66 AISI 1015 TO 1025; SURFACE TREATMENT -PHOSPHATE MIL-P-16232 TYPE M CLASS 1; COUNTERBORE DIA 0.531 IN.; COUNTERBORE DEPTH 0.406 IN.; OUTSIDE DIA 3.000 IN.; BORE LENGTH 1.750 IN.; FLANGE WIDTH 0.375 IN.; FACE WIDTH 0.500 IN.; BORE INSIDE DIA 0.999 IN. MIN AND 1.001 IN. MAX; HUB DIA 2.000 IN.; CHAMFER/RADIUS OF OUTSIDE DIA 0.125 IN. RADIUS