CFHA-832-6 is a concealed-head self-clinching stud designed for permanent installation in aluminum sheets with a hardness of HRB 50 / HB 89 or less. It features an M3 x 0.5 thread, a shank length of 0.075 in, and requires a minimum blind hole depth of 0.172 in and a hole diameter of 0.138 in. Installation is performed using a press with a hollow anvil and solid punch, displacing sheet material around the head to secure the fastener while leaving the opposite side smooth. It meets NAS63540/4 specifications when ordered with the appropriate part number. The stud is compatible with aluminum sheets as thin as 0.062 in.
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-832-6 | CFHA-832-6 |
| Product Name | Concealed-Head Studs - Types CHA,CFHA,CHC,CFHC - Unified | Concealed Head Studs |
| Attachment | Pressed | Threaded |
| Shape | Round | |
| Design Units | English | English |
| Inch | # 8 | # 8 |
