Used on 4931-00-121-8707 test set,fire control subsystem an/gsm-249. 2a thread class right-hand knurled no. 1 head style 18 thread quantity per inch screw head has straight knurl 32 diameter pitch 70 degree tooth angle unc thread series
2a thread class right-hand 0.145" thread length pan head style 40 thread quantity per inch navy special project passivate surface treated unc thread series
2a thread class right-hand 0.342" thread length pan no. 2 head style 18 thread quantity per inch undercut below shoulder 0.063 in. lg, 0.230-0.240 in. dia unc thread series
3a thread class right-hand 0.443" thread length flat countersunk undercut head style 28 thread quantity per inch furnished with one o ring passivate surface treated unjf thread series
2a thread class right-hand 0.184" thread length flat chamfer head style 32 thread quantity per inch navy special project passivate surface treated unc thread series
2a thread class right-hand 0.295" thread length hexagon head style 32 thread quantity per inch shoulder undercut foe relief passivate surface treated unc thread series
3a thread class right-hand 0.600" thread length flat chamfer head style 24 thread quantity per inch four prones on head 0.040 in. min dia, 0.050 in. max dia to 0.066 in min dia, 0.076 in. max dia unjf thread series
3a thread class right-hand 0.366" thread length flat countersunk head style 28 thread quantity per inch aluminum bearing surface of head surface treated unjf thread series
3a thread class right-hand 0.380" thread length flat countersunk undercut head style 32 thread quantity per inch furnished with one o-ring passivate surface treated unjf thread series
3a thread class right-hand 0.443" thread length flat countersunk undercut head style 28 thread quantity per inch furnished with one o ring passivate surface treated unjf thread series
3a thread class right-hand 0.469" thread length flat countersunk head style 28 thread quantity per inch furnished with one o ring. must be lubricated with cetyl alcohol passivate surface treated unjf thread series
3a thread class right-hand 0.615" thread length flat countersunk undercut head style 24 thread quantity per inch passivate surface treated unjf thread series
