Concealed-head self-clinching studs install permanently in steel or aluminum sheets as thin as 0.062 in. to provide reusable threads while leaving the opposite side smooth and unmarred. The CHC-440-10 is a #4-40 thread size, stainless steel stud designed for sheets with hardness up to HRB 70 / HB 125. It requires a blind hole of 0.112 in. diameter and a minimum mounting depth of 0.172 in. Installation is accomplished using a standard press with a PEMSERTER or equivalent tool. The stud accommodates a minimum sheet thickness of 0.062 in. and maintains a minimum distance of 0.135 in. from the hole center to the sheet edge.
These studs ensure permanent mounting in metal sheets as thin as .062 in.
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-440-10 | CHC-440-10 |
| Product Name | Concealed-Head Studs - Types CHA,CFHA,CHC,CFHC - Unified | Concealed Head Studs |
| Attachment | Pressed | Threaded |
| Shape | Round | |
| Design Units | English | English |
| Inch | # 4 | # 4 |
