Pierce Nuts

Nov. 15, 2002
The most economical pierce nut is the universal one.

The most economical pierce nut is the universal one. Dies coin the metal and force it into nut undercuts. This nut is also available as a strip pierce nut in which strands of wire hold nuts together in a continuous strip. The nut strip simplifies automatic assembly by eliminating feed hoppers and nut orientation stations.

In the assembly operation, pierce nuts are fed continuously under a plunger. With each press stroke, the nut pilot is driven through the metal panel, piercing the mounting hole for the fastener. Clinching die ribs cold-flow the panel metal into the undercut, securing the nut to the panel. High-strength pierce nuts are used where greater stresses are encountered.

Pierce die nuts are designed for dynamically stressed applications. They have great resistance to pull-through, shear, and impact loads. Flush mounting makes the nut self-sealing.

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