Heli-coil 5402-06 Thread Repair Kit 6-40 Unf 36 Inserts

Product Description

The HELI-COIL 5402-06 is a complete thread repair kit designed to restore damaged or stripped internal threads to factory-spec condition. The kit centers on a coiled stainless-style threaded insert sized for 6-40 UNF threads, with an insert length of 0.207 inches. It includes every tool needed to complete the repair in one package: a wire gauge drill bit, a tap, an installation tool, and a tang removal tool. Licensed tradespeople and maintenance professionals install this type of kit when a fastener hole has been cross-threaded, pulled out, or otherwise compromised and the base material cannot simply be replaced.

This kit is suited for precision repair work on light assemblies where 6-40 UNF thread engagement is required. Typical applications include electrical enclosures, HVAC equipment housings, small motor brackets, and control panel components. The 36-insert count supports multiple repairs from a single kit. Inserts are provided in two length options: 12 inserts at the shortest length of 0.138 inches and 12 inserts at the longest length of 0.276 inches, with the remaining 12 at the nominal 0.207-inch length, allowing the technician to match insert depth to available material thickness.

Key Features

• Complete kit includes drill, tap, installation tool, and tang removal tool - no separate sourcing required
• 6-40 UNF thread standard for precision fine-thread repair applications
• 36 threaded inserts included across three length sizes, 12 inserts per length
• Insert lengths range from 0.138 inches to 0.276 inches to accommodate varying material thicknesses
• Wire gauge drill size No. 25 (0.1495 inches decimal) specified for correct hole preparation
• Tang removal tool size 3/32 included for clean post-installation finish

Compatibility

Designed as an OEM-style thread repair solution for any base material requiring 6-40 UNF internal threads, including aluminum, cast iron, and steel components common in HVAC, electrical, and light mechanical assemblies.

Installation Notes

Thread repair kits of this type are installed by HVAC technicians, electricians, and mechanical service professionals. Before beginning, power down and de-energize any equipment being serviced in accordance with OSHA lockout/tagout procedures. Drill the damaged hole to the specified wire gauge No. 25 diameter, tap with the included tap, then drive the insert using the provided installation tool. Remove the tang with the included tang removal tool after the insert is fully seated.