3a thread class right-hand 4.500" overall length 16 thread quantity per inch navy special project zinc surface treated round, closed w/shoulder unc thread series
2a thread class left-hand 4.540" thread length 11.300" overall length 20 thread quantity per inch supply with 0.250-28nf 2a thd on point 0.400 in. long primer surface treated unf thread series
2a thread class right-hand 3.000" thread length 9.500" overall length 20 thread quantity per inch solid film lubricant on head area only primer first shoulder surface treated unf thread series
2a thread class right-hand 1.440" thread length 2.367" overall length 24 thread quantity per inch hole in shank 2.155 in. nom lg from head; hole 0.066 in. min, 0.071 in. max dia passivate surface treated round, closed unf thread series