2a thread class right-hand 0.730" thread length 3.820" overall length 11 thread quantity per inch externally relieved body, first diameter from head is 0.500 in.dia. unc thread series
2a thread class right-hand 1.000" thread length hexagon head style 16 thread quantity per inch includes a silicone rubber o-ring under head pt no 21849 unc thread series
universal head style 0.376" grip length ns" letters after the material code "b" indicate no preference to lock type (may be visible or internal) . rivets with no letter code (indicating visible lock type) chromate sleeve surface treated