right-hand 1.312" err default 18 thread quantity per inch navy special project one hole 5/16 in. dia drilled through 1/4 in. from end opposite thd end for pin spanner no.4-58
3b thread class right-hand 20 thread quantity per inch shpe is like "d", one side of sleeve is cut flat, flange on one side of sleeve width is .100 to .110