3a thread class right-hand 0.500" thread length flat chamfer head style 24 thread quantity per inch 18-8 stainless steel socket head cap screw unc thread series
3a thread class right-hand 0.578" thread length dished hexagon head style 0.070" hole diameter 0.615" grip length 24 thread quantity per inch bolt tension hex head close tolerance A286 cres long thread reduced major thread dia. self locking cadmium surface treated unjf thread series