construction formwork accessories fastener nut cone ,can be used with B-form tie bolt to fix formwork we manufacture ... scaffolding and pipe .we also manufacture other construction formwork accessories such as pin,wedge ,wedge bolt , ... rod,B-form tie/bolt,B-nut,D-cone ,expansion anchor bolt ,implosion nut,wing nut ... building ,bridge,railway construction to fix plastic,AL ,steel,wood formwork plastic cone