... . With T-Bolt and regular nut and flanged nut7. Standard: BS1139&EN74 Class A&B8. High Quality Forged Coupler We are leading ... engaged in scaffolding equipment. +We offer all range of drop forged and pressed scaffolding couplers/clamps, such as double/fixed coupler, ... transom, scaffolding ladder, adjustable u-head, universal jack, base plate, and accessories such as T bolt, eye bolt, hex nut, flange ...