... known as American pin ,stub pin used to fix formwork in building construction we are a Chinese manufacturer of construction formwork accessories and building ... ,B-cone,D-cone,inner unit, D-form tie,pin,wedge,wedge pin,form tie,B-cone,D-cone,hex nut,flat ... nut ,cutting wire and other non-standard fastener most of them are used in building ,channel,bridge construction to fix formworks standard ...