Product types of HELICOIL® – Bollhoff Armstrong Limited

Wide range of HELICOIL® insert types

Bollhoff Armstrong produce the widest range of wire thread inserts currently available from a single source, including the classic HELICOIL®, HELICOIL® plus for ease of installation and now HELICOIL® tangfree for those most sensitive of operations.

HELICOIL® classic

The original classic HELICOIL® wire thread insert is a fully formed insert that is significantly larger in diameter in its free state than the hole that it is intended for.
HELICOIL® classic in detail
HELICOIL® plus

HELICOIL® plus has a reduced diameter first coil ensuring easy installation without the need for pre-winder tooling.
HELICOIL® plus in detail
HELICOIL® tangfree

Unlike HELICOIL® classic and HELICOIL® plus the HELICOIL® tangfree product has a driving notch at both ends of the insert rather than the conventional tang.
HELICOIL® tangfree in detail
HELICOIL® TWINSERT

The HELICOIL® TWINSERT system consists of two interlocking HELICOIL® inserts which together provide for the maximum strength of the reinforced thread.
HELICOIL® TWINSERT in detail