... washer to fix formwork in building construction we are a Chinese manufacturer of construction formwork accessories and building fastener ... ,B-cone,D-cone,hex nut,flat tie ,wall tie,tie rod,wing nut,scaffold coupler,u-clip,hook ... ,expansion anchor bolt,chain roller,implosion nut ,cutting wire and other non-standard fastener most ... building ,channel,bridge construction to fix formworks A clamp