2.573" hole diameter 3.013" outside diameter 0.034" material thickness 2 internal keys equally spaced 0.310 in. min, 0.315 in. max width, 1.189 in. min, 1.193 in. max distance from center line to top of internal key recessed
3b thread class right-hand 12 thread quantity per inch navy special project 6 slots 0.160 in. wide by 0.260 in. deep on flange face cadmium surface treated