1/4-20 STI Screw Thread Repair Insert STI Tap Perma-Coil 1428-104 Fits Heli USA
PERMATHREAD 1428-104 1/4-20 STI TAP THREAD REPAIR INSERT TAP CARBON STEEL. THIS TAP IS SOLELY FOR USE WITH PERMATHREAD OR HELICOIL SPRING TYPE THREAD REPAIR INSERTS. IT CAN NOT BE PUT TO USE AS A REGULAR HAND TAP.