Used on aircraft, stratofortress b-52;aircraft, galaxy c-5. 3a all ends thread class weapon system essential cadmium surface treated unf 2nd end thread series
3a 1st end thread class mtg flange in lieu of wrenching facility, 2 holes, 0.205 in. nom dia, 1.340 in. distance c to c anodize surface treated anpt 2nd end thread series