• For use with: Helical Screw Thread Inserts
  
• Use with Internal Thread Size: 1/2-20 UNF
• Material: HSS (High Speed Steel)
  
• Compatible with: Helicoil, Recoil, Perma-Coil, Powercoil or any other standard Helical Screw Thread Inserts

Our Screw Thread Insert (STI) Taps are used specifically to create threads for Helical Thread Inserts.  STI Taps are oversized so the thread produced will accept a Helical Wire Insert of the same nominal size and pitch - meaning the hole created by the Tap goes back to the original dimension allowing the original fastener to be used.