CHA-M3-8 is a concealed-head self-clinching stud made for aluminum sheets with a minimum thickness of 1.6 mm, designed to install permanently in a blind hole and leave the opposite side smooth. It has an M3 x 0.5 thread and a shank length of 8 mm, suitable for installation using a standard press. The stud is recommended for aluminum sheets with hardness HRB 50 or HB 89 or less. Installation requires a minimum blind hole diameter of 3.6 mm and a minimum depth of 4.37 mm. The flange must become flush with the sheet surface upon installation.
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 | CHA-M3-8 | CHA-M3-8 |
| Product Name | Concealed-Head Studs - Types CHA,CFHA,CHC,CFHC - Metric | Concealed Head Studs |
| Attachment | Pressed | Threaded |
| Shape | Round | |
| Design Units | Metric | Metric |
| Metric | M3 | M3; M3 x 0.5 |
