Type CLA aluminum self-clinching nuts install permanently in aluminum sheets and provide load-bearing threads with high pushout and torque-out resistance. The CLA-440-1 variant is a #4-40 thread size with a shank code of 1, designed for use in aluminum sheets up to 0.1875 in. thick and requiring a minimum edge distance of 0.22 in. Installation requires a hole size of 0.166 in. and uses a serrated clinching ring to prevent rotation. Performance data confirms pushout loads between 800 and 1500 lbf and torque-out resistance of 6 in.-lb for this thread size in 5052-H34 aluminum.
Self-clinching nuts are installed by placing them in properly sized holes in sheets and applying a parallel squeezing force to the head of the nut. The sheet metal surrounding the head cold flows into an undercut thereby making the fastener an integral part of the sheet. A serrated clinching ring prevents the fastener from rotating after installation.
Type CLA aluminum nuts are recommended for use in aluminum sheet with a hardness of HRB 50 or less on the Rockwell “B” scale.
Unplated threads are sized to accept a basic go gauge after .00025” plating.
| PennEngineering® | bisco industries | |
|---|---|---|
| Product Category | Nuts | Nuts |
| Product Number | CLA-440-1 | CLA-440-1 |
| Product Name | Self-Clinching Nuts - Type CLA - Unified | Clinch Nuts |
| Type | Self-Clinching Nut | Self-Clinching Nut |
