... couplers, includes German type, American type, Australian Type, Japanese type, Korean type, British type, and so on. All the produces in accordance with the BS1139 and ... or hot dip galvanization. Standard couplers are widely used with Ø48.3 steel scaffold tubes, we also produce a few ... at right angles. 2.tightening nuts suit standard scaffold spanner 3.replaceable "t" bolts,nuts and washers. 4.robust ...