Blind Fasteners

The shear strength of structural blind fasteners is generated by the combined resistance against failure of the pin and sleeve. This takes place along the joint shear line between fastened plates.The shear strength of structural blind fasteners is generated by the combined resistance against failure of the pin and sleeve. This takes place along the joint shear line between fastened plates.

The tensile strength of structural blind fasteners differs to that of LockBolts, as they form a blind side positive lock either by bulbing or expanding of the sleeve. The sleeve, assisted by the permanently secured 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 joint material.

Note: The pre-load of blind rivets is generally not published, as it varies widely depending on the application.

Huck Lockbolts

Installation Sequence

  • 1. Pin placed into prepared hole, tools is placed over the fastener pintail
    1. Pin placed into prepared hole, tools is placed over the fastener pintail
  • 2. Tool activated, deforming of blind side begins
    2. Tool activated, deforming of blind side begins
  • 3. Joint tightened, internal locking mechanism formed
    3. Joint tightened, internal locking mechanism formed
  • 4. Pintail breaks, installation complete
    4. Pintail breaks, installation complete

Blind Fasteners Benefits

  • HIGH PERFORMANCE MAINTENANCE FREE JOINTS
    HIGH PERFORMANCE MAINTENANCE FREE JOINTS
  • QUICK & CONSISTENT INSTALLATION
    QUICK & CONSISTENT INSTALLATION
  • GREATER FLEXIBILITY IN YOUR PRODUCTION
    GREATER FLEXIBILITY IN YOUR PRODUCTION
  • LOWER OVERALL COST
    LOWER OVERALL COST

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