CHC-M4-25 is a concealed-head self-clinching stud for metric threads, designed for permanent installation in steel or aluminum sheets as thin as 1.6 mm. It features an M4 x 0.7 thread and a shank length of 25 mm, with a minimum blind hole diameter of 4.6 mm and a minimum mounting depth of 7.37 mm. The stud allows the rear surface of the sheet to remain smooth and unmarred, supporting ingress protection requirements. Installation requires only a blind milled hole and a standard press. It is recommended for use in materials with hardness up to HRB 70 / HB 125. The part is identified by the PEM® dimple trademark.
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-M4-25 | CHC-M4-25 |
| 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 |
