CFHA-440-10 is a concealed-head self-clinching stud designed for permanent installation in aluminum or steel sheets as thin as 0.062 in. It provides a reusable #4-40 thread and is installed using a standard press through a blind hole. The design ensures the non-installation side remains smooth and sealed, supporting ingress protection requirements. The stud is made from stainless steel and is recommended for use in materials with hardness HRB 70 or less. Dimenions include a shank length of 0.250 in, a minimum blind hole depth of 0.172 in, and a hole diameter of 0.164 in. The fastener carries the PEM® trademark and meets NAS63540/4 specifications when ordered with the correct part number.
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 | CFHA-440-10 | CFHA-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 |
