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.