... . Screw making machine, bolt making machine, cold former, rivet making machine Features:1. Used as one die two blow ... of two die four blow former), screw drawing machine, hollow rivet making machine. 2.Unique and patent technology of non- ... parts, close series drawing screw, open series drawing screw, hollow rivet and other seriesSpecification: MODEL2D3B-XP12D3B-XP22D3BK22D3B-05032D3B-35ABlank Dia. ( ...