3a thread class right-hand 0.375" thread length headless (setscrew) head style 20 thread quantity per inch cadmium or zinc surface treated unc thread series
Used on ship, ohio class ssn (trident); trident hull structure; underwater torpedo tubes; submarine auxillary and miscellaneous systems; moored training ship; submarine ship control and navigation systems; seawolf class ssn; los angeles class ssn (688). 3a thread class right-hand 1.500" thread length headless (setscrew) head style 13 thread quantity per inch unc thread series
3a thread class right-hand 0.500" thread length headless (setscrew) head style 16 thread quantity per inch cadmium or zinc surface treated unc thread series