1.0200" overall length inside left corner countersunk 0.9000 in. min 0.9100 in. max dia by 45 deg cadmium surface treated 17c solid, plain, no outside flanges
0.1590" first hole diameter 0.9900" overall length four holes equally spaced on 1.2800 in.dia bolt circle chromate surface treated 22c solid, external flange one end