Patent ID: 8821081

Claim:
A tool for repairing damaged internal threads in blind holes, comprising: an elongated tool body with a first end having a short inverse threading tap of the diameter and pitch of the undamaged internal threads in that hole, a second end having a shape suitable to permit engagement and rotation of the body by a rotary drive, an elongated reduced diameter cylindrical body extending from the inverse threading tap toward the second end, the reduced diameter cylindrical body having a diameter slightly smaller than the internal diameter of the threads in the hole, an elongated slot extending from the first end through the threading tap and well into the reduced diameter cylindrical body, the slot permitting the inverse threading tap to be compressed and inserted past the damaged entry threads, the slot also forming two diametrically opposite cutting edges for the threading tap, a tabbed shim with a first portion having the same width of the reduced diameter cylindrical body and a thickness of said elongated slot, the tabbed shim having a second portion forming a laterally extending tab that will seat on the entrance of the internally threaded hole in order to prevent loss of the shim into the threaded hole, and the elongated slot being of a sufficient length for insertion of the shim into the slot after insertion of the tool into the threaded hole.