Concealed-Head Studs of type CFHC-M3-8 from PennEngineering® are designed for permanent installation in metal sheets as thin as 1.6 mm. These studs provide strong, reusable threads for mating hardware while maintaining a smooth surface on the opposite side of the installation. They require only a blind milled hole for installation, which can be accomplished using a standard press or a PEMSERTER® press. The studs meet NAS63540/4 specifications, making them suitable for applications requiring compliance with national aerospace standards. Their design also helps satisfy ingress protection (IP) requirements, ensuring that the assembly remains sealed from air, liquid, dust, and other contaminants. Custom sizes are available upon request.
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 | CFHC-M3-8 | CFHC-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 |
