CHC-M4-20 is a concealed-head self-clinching stud designed for permanent installation in steel or aluminum sheets as thin as 1.6 mm, providing a reusable M4 x 0.7 thread. It installs via a blind milled hole with a minimum depth of 7.37 mm and a hole diameter of 4.6 mm, ensuring the back side of the sheet remains smooth and sealed. The stud is recommended for use in materials with a hardness of HRB 70 / HB 125 or less and requires a standard press for installation. The flange is designed to remain 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 | CHC-M4-20 | CHC-M4-20 |
| Product Name | Concealed-Head Studs - Types CHA,CFHA,CHC,CFHC - Metric | Concealed Head Studs |
| Attachment | Pressed | Threaded |
| Shape | Round | |
| Design Units | Metric | Metric |
| Metric | M4 | M4; M4 x 0.7 |
