Explanatory notes
… or 73.26 ). The connection is obtained : ‑ by screwing, when using cast iron or steel threaded fittings; … collars, elbows and bends and return bends, reducers, tees, crosses, caps and plugs, lap joint stub‑ends, fittings for … parts of structures ( heading 73.08 ). (b) Bolts, nuts, screws, etc., suitable for use in the assembly of tube or …