Heli-coil A1185-7CN438 7/16-14 Unc Free Running Insert

Product Description

The HELI-COIL A1185-7CN438 is a free running helical wire thread insert designed to create durable, wear-resistant internal threads in tapped holes. Manufactured from 304 stainless steel with a bright, uncoated finish, this insert accepts a 7/16-14 UNC thread and measures 0.438 inches in overall length, corresponding to a 1D length-to-diameter ratio. The tanged design allows installation with a standard HELI-COIL insertion tool, and the 4-1/2 free coils provide consistent thread engagement. This insert is used by machinists, maintenance technicians, and trade professionals performing thread repair or new thread formation in metal components.

Free running inserts are used when a standard thread fit is required without intentional locking or prevailing torque. This part is suited for thread repair in stripped or damaged holes, original equipment manufacturing, and maintenance applications across HVAC equipment, pumps, motors, electrical enclosures, and general mechanical assemblies. The 7/16-14 UNC size is common in industrial and mechanical trade applications where inch-standard fasteners are specified. Sold individually, with a minimum order quantity of 10 units.

Key Features

• 7/16-14 UNC thread size for compatibility with standard inch-series fasteners
• 304 stainless steel construction for corrosion resistance in demanding environments
• Tanged design for use with standard HELI-COIL installation tooling
• 0.438 inches overall length at a 1D length-to-diameter ratio for shallow-hole applications
• 4-1/2 free coils provide consistent thread form and load distribution
• Bright, uncoated finish suitable for general mechanical applications

Compatibility

Designed as an OEM-style replacement or new-installation thread insert for any application requiring a 7/16-14 UNC internal thread in metal substrates.

Installation Notes

Installation requires a HELI-COIL tang break-off tool and the appropriate drill and tap for the specified insert size. Ensure the host material is properly tapped to HELI-COIL insert tap dimensions before installation. After seating the insert flush with or below the surface, break off the installation tang using the designated tool. Follow applicable mechanical assembly standards for the host equipment when performing thread repair.