... Sunk Head Plug, Brass Plug, Brass Pipe Plug -various sizes -thread:BSP,NPT -high pressure -finish requeste pipe plug of ... ,Z94/M12*1.5,Z94/M14*1.5pipe plug of hasco mold part :1.For steam, ... through a deliberate difference of taper between the plug and the tapped hole.Flush seating is achieved through ... closer control of thread forms, sizes and taper.As factory, we specialize in this ...