3a thread class right-hand 0.375" thread length headless (setscrew) head style 20 thread quantity per inch passivate fastener surface treated unc thread series
3a thread class right-hand headless (setscrew) head style 24 thread quantity per inch a 0.143 inch undercut starting 0.450" from point unf thread series
3a thread class right-hand headless (setscrew) head style 24 thread quantity per inch a 0.143 inch under cut starting 2.200" from point unf thread series
3a thread class right-hand 0.615" thread length headless (setscrew) head style 24 thread quantity per inch passivate surface treated unjf thread series