CFHA-M4-16 is a concealed-head self-clinching stud designed for permanent installation in aluminum sheets up to 2.4 mm thick, providing an M4 x 0.7 thread. It installs in a blind hole with a minimum diameter of 4.6 mm and a minimum depth of 7.37 mm, leaving the opposite side of the sheet smooth and unmarred. This stud type is recommended for use in aluminum sheets with a hardness of HRB 50 / HB 89 or less, and installation requires a press with a hollow anvil and solid punch. The design satisfies strict ingress protection requirements by sealing the installation site from contaminants.
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-M4-16 | CFHA-M4-16 |
| 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 |
