FREE RUNNING HELICOIL by 

HELICOIL® thread inserts have been proven in practice. For over 65 years. They are available in Free Running and Screwlock versions. The green or red colour simplifies identification when installed.

The HELICOIL® is used in mechanical engineering, electronics, automotive and aerospace industries. HELICOIL® is also applied in gear housings, exhaust systems, engines and satellites, thread reinforcement, repeated installations, maintenance and repair as well as in lights, electrical appliances, hammer drills and printing presses.

HELICOIL® Plus thread inserts comply with a variety of requirements and industry standards, including those in the aerospace industry, and feature other approvals as well as suitability tests, e.g. in the field of power plant technology.

HELICOIL® Plus - Free Running

The thread insert with its precision-formed rhombic profile runs through freely turn for turn. The result is an internal thread that is true to gauge and accepts the insertion of a screw at both ends.

The dimensional stability of the ISO thread complies with DIN 13 6H, with 4H for special requirements, and meets the requirements of international standard specifications. The green colour of the HELICOIL® Plus Free Running simplifies identification even when installed. The advantages of the HELICOIL® Plus System are particularly apparent with respect to processing and tools, resulting in shorter cycle times.

The Advantage

Wire with rhombic profile is formed into elastic spirals – the “Plus” refers to the special thread start compared to the HELICOIL® Classic. Simply place it and screw it in like a screw using an installation mandrel with similar dimensions to those of a tap. Existing tools from the previous model can still be used. Due to the considerably expanded range of tools to be used, installation times are reduced by up to 20 % compared to previous methods.

See the downloads tab for more detailed information.

We've listed the most commonly used sizes here, if the size you require is not listed please contact us to make arrangements.