National manufactures a vast range of line taps to meet the material and dimensional specification laid by different International standards. Brass line taps are made with high tensile Brass as per BS 2874 -CZ 112. Threads are formed by rolling process giving the nut extra clamping force. Pressure pads are made from extruded bars (NOT CAST), preventing the pads from cracking. Brass line tapes are in natural brass and electro-tinned finish. Also supplied in high conductivity Copper.