CFHA-M5-25 is a concealed-head self-clinching stud designed for permanent installation in aluminum or steel sheets as thin as 1.6 mm, providing a reusable M5 x 0.8 thread. It installs using a standard press into a blind hole with a minimum depth of 25 mm and a hole diameter of 7.93 mm, leaving the opposite sheet surface smooth and unmarred. The stud is recommended for use in materials with a hardness of HRB 70 / HB 125 or less. Installation requires no access to the back side, supporting ingress protection requirements. The part conforms to the CFHA series specification, with dimensions and performance characteristics consistent with the series description for metric threads.
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-M5-25 | CFHA-M5-25 |
| Product Name | Concealed-Head Studs - Types CHA,CFHA,CHC,CFHC - Metric | Concealed Head Studs |
| Attachment | Pressed | Threaded |
| Shape | Round | |
| Design Units | Metric | Metric |
| Metric | M5 | M5; M5 x 0.8 |
