1/2″ x 13 UNC Imperial Tap Repair Cutter Kit Helicoil Damaged Threads 14pc Kit
UNC (UNIFIED NATIONAL COARSE) Imperial inserts. 1/2 x 13 (TPI) UNC (Unified national Coarse). 1 x 13.1mm / 33/64" drill bit. Creates a stronger internal thread in soft materials.
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