Used on F-16. 2b thread class right-hand 1.615" overall length 1.593" overall width 18 thread quantity per inch style indicated resembles item asclose as possible nickel surface treated straight type w/flange unef thread series
2b thread class right-hand use with mil-c-83723, series iii, mil-c-5015 crimp nickel surface treated double clamping action w or w/o bushing unef thread series