2b thread class right-hand 0.460" overall length 28 thread quantity per inch item has polarizing slots at 84.0 deg, 180.0 deg, and 324.0 deg silver surface treated unef thread series
2b thread class right-hand 0.330" overall length 40 thread quantity per inch accommodates a 4-40 machine screw furnished with item cadmium surface treated polarizing boss unc thread series