CFHA-M4-6 concealed-head self-clinching studs install permanently in aluminum sheets as thin as 1.6 mm to provide reusable M4 x 0.7 threads, leaving the opposite side smooth and sealed. They require a blind hole of 4.37 mm diameter and minimum depth of 2.4 mm, and are installed using a standard press. These studs are recommended for aluminum sheets with hardness HRB 50 or HB 89 or less. The installation process displaces sheet material around the head, ensuring a flush, secure fit without damaging the back surface.
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-M4-6 | CFHA-M4-6 |
| 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 |
