CFHC-M3-20 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 M3 x 0.5 thread. It installs using a blind milled hole with a minimum depth and requires a flush flange fit. The fastener retains a smooth, unmarred surface on the opposite side of the sheet and meets NAS63540/4 specifications when ordered accordingly. Installation is performed with a PEMSERTER® or HAEGER® press using specified tooling. The stud is made from 300 series stainless steel with a passivated finish and is rated for sheet hardness up to HRB 70 / HB 125.
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-M3-20 | CFHC-M3-20 |
| 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 |
