Heli-coil R1191-06 6-40 Unf Threaded Insert Stainless Steel 12pk

Product Description

The HELI-COIL R1191-06 is a free running wire thread insert designed to create strong, wear-resistant internal threads in materials that are prone to stripping or thread damage. With a 6-40 UNF thread size and an overall insert length of 0.207 inches, this tanged insert is installed using a dedicated installation tool that winds the coil into a pre-tapped hole. The stainless steel construction provides corrosion resistance and durability in demanding service environments. Each package contains 12 inserts, making it practical for production runs or repair jobs requiring multiple installations.

Free running inserts like the R1191-06 are used across industrial, aerospace, automotive, and mechanical repair applications where thread restoration or reinforcement is needed. They are well suited for tapped holes in aluminum, magnesium, cast iron, plastic, and other base materials where direct threading would not provide adequate holding strength. Technicians and machinists install these inserts as both OEM production fasteners and field repairs on stripped or damaged threads.

Key Features

• 6-40 UNF thread size for fine-pitch fastening applications
• 0.207 inch overall insert length provides controlled thread engagement depth
• Tanged design allows removal of the installation tang after seating
• Stainless steel construction resists corrosion and withstands elevated temperatures
• Free running style allows smooth thread engagement without locking interference
• Package of 12 inserts supports multi-unit repair or production use

Compatibility

Designed as an OEM-style wire thread insert for use in any application requiring a 6-40 UNF internal thread repair or reinforcement in a host material tapped to the appropriate HELI-COIL insert drill and tap specification.

Installation Notes

Installation requires a properly sized HELI-COIL tap to prepare the host material and a matching installation tool to wind the insert into the tapped hole. After seating, the tang should be broken off using a tang break-off tool or suitable punch. Always power down or de-energize any equipment before performing thread repair on live assemblies. Follow applicable torque and fastener specifications for the host assembly per the original equipment documentation.