Concealed-head self-clinching studs, including the CHC-M4-16 variant, permanently install in steel or aluminum sheets as thin as 1.6 mm to provide reusable M4 x 0.7 threads. They leave the opposite side of the sheet smooth and unmarred, supporting sealing requirements for ingress protection. Installation requires a blind hole with a minimum diameter of 4.37 mm and depth of 7.93 mm, and is accomplished using a standard press. Units are recommended for use in materials with hardness up to HRB 70 / HB 125. The part accommodates a minimum sheet thickness of 1.6 mm and a maximum shank length of 16 mm. The sheet edge distance to the fastener centerline must be at least 5.6 mm.
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-M4-16 | CHC-M4-16 |
| Product Name | Concealed-Head Studs - Types CHA,CFHA,CHC,CFHC - Metric | Concealed Head Studs |
| Attachment | Pressed | Threaded |
| Shape | Round | |
| Design Units | Metric | Metric |
| Metric | M4 | M4; M4 x 0.7 |
