3b thread class right-hand 0.644" thread length 20 thread quantity per inch anti rotation knurl thats centrally located; dry film lube per mil-l-8937 on threads only passivate surface treated flange unjf thread series
3b thread class right-hand 0.888" thread length 20 thread quantity per inch centrally located anti rotation knurl passivate surface treated flange unjf thread series
3b thread class right-hand 1.250" thread length 14 thread quantity per inch material is alloy steel grade 4140, mil-s-5626 or grade 8740, ams 6322; cadmium plated in accordance with qq-p-416, type ii, class 3 keylock unjf thread series