This Standard Practice establishes requirements for copper-nickel socket-welding fittings, NPS 1/4 through 12, (or as noted), for use with pipe manufactured to one of the following standards: MIL-T-16420, ASTM B 466, and ASTM B 467.

Fitting types include long-radius elbows, short-radius elbows, 45° elbows, tees, reducing tees, long-turn single-sweep tees, long-turn double-sweep tees, crosses, 45° y-laterals, couplings, reducing couplings, caps, pipe returns, inserts, adapters, plugs, and unions

Fittings manufactured to this Standard Practice may be produced from castings, forgings, bar, pipe, tube, or plate by forming, machining, or a combination of the two.

Fittings manufactured to this Standard Practice may be ordered with one or more ends with pipe threads as provided herein.