Heli-coil A3585-06CNPF138 Screw-locking Insert 6-32 Unc

Product Description

The HELI-COIL A3585-06CNPF138 is a tangless screw-locking helical wire insert designed to create a strong, vibration-resistant threaded hole in parent materials with damaged, worn, or undersized threads. Built from Grade 304 stainless steel with a primer-free finish, this insert is suited for corrosion-prone environments and applications where chemical pre-treatment is not practical. The 6-32 UNC thread size and 1D length-to-diameter ratio make it a compact solution for tight assemblies. With a maximum locking torque of 6 in/lb and a minimum break-away torque of 1.00 in/lb, it delivers reliable thread locking without adhesives or external locking elements. Installation and removal use standard tangless tooling, eliminating tang extraction steps.

This insert is used in light-gauge metal, aluminum, plastic, and composite assemblies across HVAC equipment, electrical enclosures, plumbing fixtures, and general industrial hardware where thread repair or thread reinforcement in thin-wall sections is required. The 6-32 UNC thread is common in control boards, terminal blocks, and panel fastening applications. Licensed technicians and maintenance professionals performing thread repair on production equipment or field-serviced units will find this insert appropriate for both OEM and repair use cases.

Key Features

• Grade 304 stainless steel construction resists corrosion in humid or chemically active environments
• Tangless design eliminates the tang-extraction step, reducing installation time and debris risk
• Primer-free finish allows direct installation without chemical pre-treatment of the parent bore
• Maximum locking torque of 6 in/lb provides positive thread engagement under vibration
• Minimum break-away torque of 1.00 in/lb allows controlled disassembly without thread damage
• 2-3/4 free coils within a 0.138-inch overall length suit thin-wall and space-constrained parent materials

Compatibility

Designed as an OEM-style thread repair or thread reinforcement insert for any parent material tapped to accept a 6-32 UNC helical insert with a minimum outside diameter of 0.178 inches and a maximum outside diameter of 0.193 inches.

Installation Notes

Installation requires a tang-drive or tangless installation tool sized for 6-32 UNC inserts; consult HELI-COIL tooling specifications for the correct mandrel. The parent material must be pre-drilled and tapped with the appropriate STI (Screw Thread Insert) tap before the insert is driven in. Power down any electrical equipment and depressurize any fluid systems before performing thread repair work in those assemblies. Do not exceed the specified locking torque range during installation, as overtorque can distort the coil and reduce holding strength.