Type:

This specification covers closely-wound helical coil, screw thread inserts made from an age hardenable nickel base alloy formed wire of the type identified under the Unified Numbering System as UNS N07750. The inner surface of the insert coil, after assembly into a screw thread tapped hole, provides internal threads of standard 60° Unified Form.

Application:

Primarily to provide hard, smooth internal screw threads in heat resistant alloys for use at temperatures up to approximately 1000 °F or where low permeability is desired, and for salvaging worn or damaged internal threads.

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