Concealed-head self-clinching studs of type CHC are designed for permanent installation in steel or aluminum sheets as thin as 1.6 mm, providing reusable M5x0.8 threads while leaving the opposite sheet surface smooth. Installation requires a blind hole with a diameter of 5.6 mm and minimum depth of 6.4 mm, and the flange must be installed flush with the sheet surface. These studs are recommended for materials with hardness up to HRB 70 / HB 125. The fastener is installed using a press with a hollow anvil and solid punch. Center-to-edge clearance must account for sheet integrity and proximity to other fasteners or bends.
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-M5-16 | CHC-M5-16 |
| Product Name | Concealed-Head Studs - Types CHA,CFHA,CHC,CFHC - Metric | Concealed Head Studs |
| Attachment | Pressed | Threaded |
| Shape | Round | |
| Design Units | Metric | Metric |
| Metric | M5 | M5; M5 x 0.8 |
