CFHA-M4-25 is a concealed-head self-clinching stud designed for permanent installation in aluminum sheets with a minimum thickness of 1.6 mm. It features an M4 x 0.7 thread and a shank length of 25 mm, allowing smooth, unmarred surfaces on the side opposite installation. The fastener installs using a standard press into a blind hole and meets the performance requirements for aluminum sheets with hardness up to HRB 50 / HB 89. The concealed-head design ensures compliance with ingress protection requirements by maintaining a sealed interface.
These studs ensure permanent mounting in metal sheets as thin as 1.60mm.
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-M4-25 | CFHA-M4-25 |
| Product Name | Concealed-Head Studs - Types CHA,CFHA,CHC,CFHC - Metric | Concealed Head Studs |
| Attachment | Pressed | Threaded |
| Shape | Round | |
| Design Units | Metric | Metric |
| Metric | M4 | M4; M4 x 0.7 |
