CFHA-632-12 is a concealed-head self-clinching stud designed for permanent installation in aluminum or steel sheets as thin as 0.062 in. (1.6 mm), providing a reusable #6-32 thread. It installs using a standard press into a blind hole with a minimum diameter of 0.172 in. and minimum depth of 0.213 in., leaving the opposite sheet surface smooth and unmarred. This variant is recommended for aluminum sheets with hardness HRB 50 / HB 89 or less. The fastener requires no access to the back side during installation and satisfies ingress protection requirements by maintaining a sealed sheet. Dimensions and installation parameters align with NAS63540/4 specifications when ordered accordingly.
These studs ensure permanent mounting in metal sheets as thin as .062 in.
The fastener head is locked securely in a blind, milled hole and is able to handle substantial loads. The concealed-head feature allows the side of the sheet opposite installation to remain smooth.
Sheet preparation only requires a milled blind hole to the recommended minimum depth. Center-cutting end mills for hole preparation are available from PennEngineering. Installation of the concealed-head studs and standoffs is simple using a hollow anvil and solid punch. Place the head of the fastener in the hole and insert using any standard press. Displaced sheet metal flows smoothly around the head into the undercut.
| PennEngineering® | bisco industries | |
|---|---|---|
| Product Category | Studs | Studs |
| Product Number | CFHA-632-12 | CFHA-632-12 |
| Product Name | Concealed-Head Studs - Types CHA,CFHA,CHC,CFHC - Unified | Concealed Head Studs |
| Attachment | Pressed | Threaded |
| Shape | Round | |
| Design Units | English | English |
| Inch | # 6 | # 6 |
