any acceptable first hole diameter 1.6250" overall length 4.7500 in. min 4.7550 in. max w at joint, 2.2188 in. radius in upper half 17b segmented, plain, no outside flanges
0.1250" first hole diameter 1.0625" overall length left end of bore counterbored 0.8750 in. min, 0.876 in. max dia by 0.7480 in. min, 0.7520 in. max lg 22c solid, external flange one end