One of they factors of performance for fasteners over the long term is their reusability. Here are factors that go into making fasteners both reusable and durable.
There’s a wide range of factors that have an effect on fasteners and their reusability. Here’s a look at the major ones and what can be done to limit their effects on fasteners.
Damage to Fastener Drives
The drive on a fastener is the feature—often a slot, crossed slots, socket, or hex hole—that lets a driver, such as a screwdriver or Allen wrench, apply torque during installation and removal. If the drive is damaged enough upon installation or removal, the fastener becomes unusable.
In some drives, the driver slips out of the drive once the torque needed to turn the screw exceeds a certain point. This process, called camming out, often puts forces on the drive feature and head of the fastener that pushes the fastener’s materials past their yield points, permanently deforming them to the point where the fastener is useless.
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