2a 2nd end thread class 17 2nd end thread quantity per inch 2.000 in. od bulkhead flange w/three 0.177 in. dia mtg holes equally spaced on 1.600 in. dia bolt circle, flange located 0.740 in. from second end unf 1st end thread series
Used on f/a-18 hornet aircraft. 3a 2nd end bulkhead thread class 12 1st end thread quantity per inch weapon system essential chromate surface treated unj 1st end thread series
Used on aircraft mh-47e special operations aircraft;helicopter, sea knight h-46;helicopter, chinook, ch-47. 3a 2nd end thread class weapon system essential passivate surface treated unjf 2nd end thread series
3a 2nd end thread class do not dupe with items that have seat angle of degrees-cqrb; will not work on navy applications, i.e. F404 arct-afterburner unjf 2nd end thread series