Used on 4920-01-389-0602; engine, aircraft, f100-pw-100 (f-15a/b/c/d). 3a all ends thread class 12 1st end thread quantity per inch unj 1st end thread series
Used on 4920-01-389-0602; engine, aircraft, f100-pw-100 (f-15a/b/c/d). 3a 1st end thread class pipe end has 32 threads per inch nptf 2nd end thread series