Heli-coil 7570-4 Thread Insert Extracting Tool 1/4 in Unc

Product Description

The HELI-COIL 7570-4 is a thread insert extracting tool designed for the removal of Tangless helical thread inserts from tapped holes. It is used when an installed insert needs to be backed out without damaging the parent material or the surrounding threads. The tool is sized for 1/4 inch nominal diameter inserts conforming to UNC thread standards. Licensed HVAC technicians, machinists, maintenance mechanics, and field service professionals keep this tool in their kit for repair workflows that involve re-tapping or insert replacement in aluminum, steel, or cast housings.

This extracting tool is intended for use with Tangless insert systems at the 1/4 inch nominal diameter. Tangless inserts are common in aerospace, HVAC equipment frames, compressor housings, and industrial machinery where standard coiled inserts with drive tangs are not preferred. The 7570-4 fits into extraction procedures where the insert must be removed cleanly, allowing the tapped hole to be reused or replaced with a new insert without re-drilling.

Key Features

• Sized for 1/4 inch nominal diameter Tangless thread inserts
• Compatible with UNC thread standard inserts
• Designed for clean extraction without damaging parent material threads
• Enables insert removal for repair, replacement, or hole reuse
• Lightweight at 0.44 pounds for easy handling in the field

Compatibility

Designed for use with Tangless helical thread inserts at 1/4 inch nominal diameter with UNC thread form. Confirm insert brand and thread specification before use to ensure proper fit.

Installation Notes

Insert extraction should be performed by a qualified mechanic or technician familiar with thread repair procedures. Power down and de-energize any equipment before accessing threaded fastener locations. Use the correct extracting tool size matched to the installed insert to avoid thread damage. Follow the insert manufacturer's removal procedure for Tangless inserts to prevent galling or distortion of the parent material bore.