Heli-coil 5402-3 Thread Repair Kit 10-32 Unf 36 Inserts

Product Description

The HELI-COIL 5402-3 is a complete thread repair kit for 10-32 UNF threaded holes. It restores damaged or stripped internal threads to original factory specifications using coiled wire inserts. The kit includes a drill, tap, installation tool, and tang removal tool, so a technician has everything needed to complete the repair in one package. Each kit contains 36 inserts across multiple length sizes, with insert lengths ranging from 0.190 inches to 0.380 inches. The nominal insert length is 0.285 inches. This kit is used in metal repair work across HVAC equipment, electrical enclosures, and general mechanical assemblies where fine-thread fastener holes have been damaged.

This kit is suited for field and shop repairs on any assembly using 10-32 UNF fasteners. Common applications include restoring threads in aluminum housings, steel panels, and cast components found in HVAC units, electrical equipment, and light industrial machinery. The 13/64-inch drill size and tap part number 3FPB are included, eliminating the need to source separate tooling. The installation tool part number is 2299-3. Insert package part number is R1191-3. Twelve inserts are included for each of the three size lengths, giving the technician flexibility for varying installation depths.

Key Features

• Complete kit: includes drill, tap, installation tool, and tang removal tool
• 36 total inserts - 12 inserts per length size across three lengths
• Insert lengths range from 0.190 inches to 0.380 inches; nominal length 0.285 inches
• Thread size: 10-32 UNF (Unified National Fine)
• Drill size: 13/64 inch; tap part number 3FPB
• Tang removal tool size: 1/8 inch

Compatibility

Designed for use in any application requiring repair of 10-32 UNF internal threads in metal substrates, including aluminum, steel, and cast assemblies common in HVAC equipment, electrical enclosures, and general mechanical components.

Installation Notes

Thread repair should be performed by a qualified mechanic or technician familiar with thread insert procedures. Power down and de-energize any equipment before drilling or tapping near electrical components. Use the included drill and tap in sequence before driving the insert with the installation tool, then break off the tang using the included tang removal tool. Follow the insert manufacturer's depth recommendations and applicable torque specifications for the fastener being reinstalled.