Arconic Fastening Systems and Rings lightweight HUCKCOMP® lockbolt fastener is a high-strength, lightweight, aerospace fastener intended for use in composite material applications. Easily the most cost-effective aerospace fastener available for fastening composite material. The HUCKCOMP® can help reduce aircraft weight due to its all titanium construction and improve fastener installation time compared to threaded fasteners.
The HUCKCOMP® fastener has similar design features as the LGP® fastener. The fastener has large bearing heads and accompanied with large bearing flanged based titanium collars that provide a high clamp load distributed over a larger area so as not to cause material damage. This large bearing high-clamp force gives the HUCKCOMP® fastener the ability to achieve joint integrity and enhanced fatigue performance.
Our HUCKCOMP® lockbolts have been used on aircraft for over 50 years. Unlike threaded fasteners, lockbolts install rapidly and cannot vibrate loose. Their unique design assures predictable consistent clamp force.
Collars for the HUCKCOMP® fastener are CP titanium, which provides an all titanium fastener installation, which is compatible with graphite epoxy type composite materials. The HUCKCOMP® lockbolt features lock grooves with a tapered root diameter and variable pitch. A larger volume of collar material flows into the locking grooves at the beginning of the installation sequence. This gives the fastener its greatest tensile strength where it is most crucial during swaging of the collar so that a high clamp force can be developed without loss of strength during collar swaging/extrusion resulting in a high residual clamp and high ultimate tensile. The 60° included angle of the locking groove has a 20° pressure flank angle, which serves as a platform for retaining the high clamp load generated during collar installation. There are two types of HUCKCOMP® lockbolts: HUCKCOMP® pull-type lockbolts
and HUCKCOMP® stump-type lockbolts