Explanatory notes
… or 73.26 ). The connection is obtained : ‑ by screwing, when using cast iron or steel threaded fittings; … This heading therefore includes flat flanges and flanges with forged collars, elbows and bends and return bends, … as described above; and tube plugs, threaded or not, fitted with a ring, hook, etc. (e.g., those used for fixing washing …