... .6mm 4.surface:golden/silver zinc galvanized Scaffolding Coupler - Inner Joint PinSize48.6 mm or 1 1 ... range of drop forged and pressed scaffolding couplers/clamps, such as double/fixed coupler, swivel coupler, ... coupler, putlog coupler, plank coupler, sleeve coupler, joint pin, single coupler, etc.+We also provide standard, ... can be golden/silver zinc galvanized or hot dipped galvanized. Inner Joint Pin