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HELICOIL® Tangfree Screwlock thread insert
Material: Stainless steel A2 | Thread type: UNC | Packingunit: 500 pcs.

Diameter (d)

Nominal length t2

For further information please contact us.


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Original - HELICOIL® Tangfree Screwlock thread insert

The HELICOIL® Tangfree Screwlock thread insert does not feature a tang so there is no tang break or removal after the installation. In addition to the classical coil thread insert, it features a screw-locking area to lock a screw. Due to the resilient frictional locking, the prevailing torques are similar to NASM8846. The prevailing torques comply with the requirements of technical delivery conditions stated in international standards as well as in aeronautical standards.

The HELICOIL® Tangfree Screwlock thread insert can be used with screws of higher property classes (8.8 and higher). It is particularly suited for low-strength materials. Due to its red colouring, it can be easily distinguished also after the installation.

• High thread strength
• Screwlock
• Wear, corrosion and temperature resistance
• Tight fit
• Increase in quality and value
• Cost saving
• No tang break

HELICOIL® Tangfree installation mandrels are required to install the HELICOIL® Tangfree Screwlock thread insert.

technical details

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Material Stainless steel
Material version A2, 1.4301, X5 CrNi1810
RoHS conformal
Surface coloured red
Thread type UNC


You can download CAD-files from our catalog on partcommunity: To Böllhoff partcommunity
Title Language Version File Download
Product Guide: Fastening and assembly technology English 1190/22-V1-EN (WBH) 936.46 KB / PDF
Data sheet: Technical information and dimensions of the product English 08/2021 489.52 KB / PDF
HELICOIL® Plus: Thread technology for high-strength fastenings - imperial threads English 0101/15.02 3.41 MB / PDF
HELICOIL® Tangfree: The tangfree coil thread insert for high-strength threads English 0150/19-V1-GB (WBH) 2.56 MB / PDF
HELICOIL® Plus: Thread technology for high-strength fastenings – metric threads English 0100/16.02 2.87 MB / PDF



General questions:
Phone: + 36 22 511 018

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