2a thread class right-hand 0.500" thread length hexagon head style 32 thread quantity per inch zfirst dia from hd 0.250 in, length 0.850 porm 0.010; second dia 0.190, grooved 0.031 porm 0.010r, length 0.095; third dia 0.250, length 0.185 porm 0.010; fourth dia 0.200 P0.005 M0.015, length 4.190; fifth dia 0.190 P0.000 M0.005, length 0.200 passivate surface treated unf thread series
Used on seawolf class ssn;level 1 / subsafe;ohio class ssbn (trident). 3a thread class right-hand 2.500" thread length headless (setscrew) head style 40 thread quantity per inch unc thread series
3a thread class right-hand 0.161" thread length headless (setscrew) head style 32 thread quantity per inch locking feature soft mail in thds cadmium surface treated unc thread series
3a thread class right-hand 0.500" thread length headless (setscrew) head style 20 thread quantity per inch soft nylon insert at point of setscrew unc thread series