internal thread size 3/8-16unc-2b; external thread size 9/16-16unc self tapping; insert is chamfered at both ends 0.480 to 0.510 diameter; made from steel, carbon sae 1117 cadmium plated, type 2, class 3; 0.0002 min thickness; end item nsn:2350-01-061-2445 tank M1
