3.000 inches long; 4 holes 0.1300 diameter, 0.1389 diameter, countersink 0.175 diameter by 100 degrees, 8-32 unc-2b threads; 2 holes 0.185 inch, 0.195 inch diameter spotface to clean up depth; 2 holes per side 0.1300 inch, 0.1389 inch diameter, countersink 0.175 diameter by 100 degrees, 8-32 unc-2b threads; chemical treat per mil-c-5541, class 3; made from 41710c casting