Used on 105mm howitzer,l119. 2a thread class right-hand 2.310" thread length headless (setscrew) head style 16 thread quantity per inch cadmium surface treated unc thread series
3a thread class right-hand 0.469" thread length flat countersunk undercut head style 28 thread quantity per inch o-ring included p/n ST7M251-8 unjf thread series
Used on bex beam,f-16a/b acft. 3a thread class right-hand 0.363" thread length flat countersunk head style 32 thread quantity per inch cadmium surface treated unjf thread series