How Huck Works

How Huck Bolts Work

Huck bolts work differently to most other fasteners as they are installed via an industrial tool that provides a permanent result.

Huck bolts are a pin and collar combo that are swaged together. In the initial stages of the installation process, the Huck gun engages & pulls on the pin, whilst the nose assembly is forced down the collar. Progressively the tool (swages) the collars, which is a softer steel than the pin, into the grooves of the harder steel pin. The pin and swaged collar are now combined to form an installed combo. 

The squeezing action reduces the diameter of the collar whilst increasing its length. This in turn stretches the pin, generating a clamp force over the joint.

Shear strength of Lock Bolts vary according to the material strength and minimal diameter of the fastener. By increasing the diameter or the grade of material, the shear strength of the fastener can be increased.

The tensile strength of LockBolts is dependent on the shear resistance of the collar material and the number of grooves it fills.


How Huck Rivets Work

Huck rivets are installed differently to Huck bolts, however the results are the same; a permanent vibration resistant fastener solution. These rivets are formed via a Huck gun pulling on the pin tail of the rivet and the sleeve either bulbing or expanding to lock itself into place. The sleeve, assisted by the permanently secured knurled pin, therefore resists failure along its centre line.

1. Bulbing

The sleeve of the fastener is compressed, causing it to fold outwards to form a bulb. This forms itself tightly against the joint material. Once the pin is permanently locked into place the pintail will break off, completing the installation.

2. Expanding

Pulling on the pintail causes the head of the pin to draw into the sleeve. This expansion causes a foot print to form against the parent material.