Sep 01, 2015
Huck LockBolts
The basic design of a Huck LockBolt is quite simple, consisting of two main parts. The pin is one part of the LockBolt. The pin (bolt) is inserted into one side of the material being used that will become fastened with another. Access to both sides of the joint is required for installation. The other part of the LockBolt is the collar. The collar is inserted over the bolt from the opposite side it was inserted into. A LockBolt tool is typically used to tighten the pin head toward the collar and surface of the material, while the anvil pushes the collar against the joint joining the two materials. The tool swages the collar, increasing the strength of the clamp on the materials. Finally, the pintail is broken off giving a clean edge.
Benefits of Huck LockBolts
- Never loosens once installed, even with vibration
- Gives direct material contact eliminating transverse vibration
- Numerous design options
- Shear strength dependent on material and bolt diameter
- Tensile strength dependent on collar material and covered grooves
Huck Structural Blind Fasteners
Structural blind fasteners also consist of two main parts: a pin and a sleeve. Initial insertion of a structural blind fastener can vary greatly depending on the type of fastener and application. There are two ways that a structural blind fastener can secure a joint:
- Bulbing
- Expanding
Bulbing
In this type of structural blind fastener, the sleeve is compressed into a bulb shape. This causes it to mold itself tightly against the joint material. when the pin is securely tightened, the pintail breaks off forming an even surface. For bulbing types of fasteners the pinhead usually stays outside the sleeve as it deforms.
Expanding
An expanding type of structural blind fastener works by expanding the sleeve over the head of the pin as the pintail is pulled, after insertion into the material. The subsequent expansion causes a larger footprint of the sleeve than the hole, securing the pinhead side of the fastener. Once the pin is secure, the pintail breaks off.
Benefits of Huck Structural Blind Fasteners
- Used in many applications where only one side of the joint is accessible
- Forms a blind side positive lock giving it its tensile strength
- Shear strength is achieved through the combined resistance of both the pin and the sleeve
- Easy installation
- Numerous design options
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fasteners, huck