CFHC-440-12 is a concealed-head self-clinching stud for stainless steel, designed to install permanently in steel or aluminum sheets as thin as 0.062 in. (1.6 mm) and provide a reusable #4-40 thread. It requires a blind hole of 0.135 in. diameter and a minimum mounting depth of 0.172 in. The stud installs using a PEMSERTER® press or equivalent, with the flange remaining flush after installation, ensuring a smooth, unmarred back side of the sheet. It meets NAS63540/4 specifications and is suitable for use in materials with hardness up to HRB 70 / HB 125. Installation tooling includes HAEGER® anvil H-103-4L and punch H-108-0020L.
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 | CFHC-440-12 | CFHC-440-12 |
| 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 |
