Used on nssn class submarine. penetration used on the nssn class submarine piping ventilation system; shape is conical; coupling provides tubing a way to traverse through different structures with out being bent; coupling is used on either side of a structure to hold tubing straight
Used on f-14a aircraft. 3b all ends thread class tube assembly, obogs tube assembly made from MS20819 0.125 in. tubing, flared tube fitting sleeve nsn 4730-00-928-8766 swivel, wrenching facilities each end unjf all ends thread series
