CHA-M4-6 is a concealed-head self-clinching stud designed for permanent installation in aluminum or steel sheets as thin as 1.6 mm, providing a threaded M4 x 0.7 insert. It requires a blind hole with a minimum diameter of 4.37 mm and minimum depth of 7.37 mm for proper installation. The stud's design ensures the back side of the sheet remains smooth and sealed, supporting ingress protection requirements. Installation is performed using a standard press with a hollow anvil and solid punch. The fastener is recommended for use in materials with hardness HRB 70 or HB 125 or less. The head is concealed after installation, and the product features the PEM trademark dimple.
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-M4-6 | CHA-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 |
