Heli-coil 5401-3 Thread Repair Kit 10-24 Unc 36 Inserts

Product Description

The HELI-COIL 5401-3 is a complete thread repair kit designed to restore damaged or stripped internal threads to their original specification. The kit centers on a coiled wire threaded insert system sized for 10-24 UNC threads, a common fastener standard found across mechanical, HVAC, electrical, and plumbing equipment assemblies. The kit ships with everything needed to complete the repair in the field: a 13/64-inch drill bit, a 3CPB tap, an installation tool (part number 2288-3), a 1/8-inch tang removal tool, and 36 inserts across three length sizes. This kit is installed by maintenance technicians, field service professionals, and equipment repair specialists working on metal components with compromised threads.

This kit is suited for restoring 10-24 UNC threaded holes in metal housings, brackets, panels, and mechanical assemblies found in residential and commercial equipment. With 36 inserts included - 12 per size - the kit supports multiple repairs from a single purchase. Insert lengths range from 0.190 inches at the shortest to 0.380 inches at the longest, with a nominal insert length of 0.285 inches, giving the technician flexibility to match the insert to the host material thickness.

Key Features

• Complete kit includes drill bit, tap, installation tool, and tang removal tool - no separate tool sourcing required
• 10-24 UNC thread standard for broad compatibility across common fastener applications
• 36 inserts total in three length sizes (12 inserts per size)
• Insert lengths span 0.190 inches to 0.380 inches to accommodate varying material thicknesses
• Nominal insert length of 0.285 inches
• Installation tool part number 2288-3 and 1/8-inch tang removal tool included

Compatibility

Designed as an OEM-style thread repair solution for any metal assembly using 10-24 UNC fastener threads where the parent material threads have been stripped or damaged.

Installation Notes

Thread repair inserts are installed by qualified technicians using the drill, tap, and installation tool included in this kit. Before beginning, de-energize or lock out any equipment being serviced and clear the work area of debris. Drill and tap the damaged hole to the specified size using the included 13/64-inch bit and 3CPB tap, then drive the insert to the proper depth using the 2288-3 installation tool. Remove the tang with the included 1/8-inch tang removal tool after seating the insert. Follow applicable equipment manufacturer service procedures throughout the repair.