2b thread class right-hand 40 thread quantity per inch knurled boss, 0.030 in. min, 0.035 in. max lg, 0.142 in. dia; thd depth 0.250 in. min passivate surface treated
2b thread class right-hand 40 thread quantity per inch navy special project knurled boss, 0.030 in. min, 0.035 in. max lg, 0.170 in. dia passivate surface treated