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How Marson Blind Rivets Work

The shear strength of non-structural blind fasteners is generated purely by the resistance against failure of the sleeve. This takes place along the joint's shear line between fastened plates.

The tensile strength of non-structural blind fasteners is caused by the forming of a blind side positive lock either by bulbing or expanding of the sleeve. The tensile strength is different to that of structural blind fasteners because it relies on the sleeve alone, and is not assisted by the pin which is not retained after installation.

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 sleeve is permanently locked into place the pin is not retained.

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.