Used on kc135 rt. 3a all ends thread class 16CMLP1JA18 1st end bulkhead thread quantity per inch fitting, elbow 45 deg. standard passivate surface treated unjf all ends thread series
2a 1st end thread class 18 1st end thread quantity per inch fitting assembly, elbow 90 deg reducer, internal flare to flare tube this elbow fitting is supplied with coupling nut with retaining wire iaw AS17089-06 elbow unjf 2nd end thread series