CHA-832-8 is a concealed-head self-clinching stud designed for permanent installation in steel or aluminum sheets as thin as 0.062 in (1.6 mm), providing a reusable #8-32 thread. It installs using a standard press into a blind hole with a minimum diameter of 0.290 in and minimum depth of 0.289 in, leaving the opposite sheet surface smooth. The stud is recommended for use in materials with hardness HRB 70 / HB 125 or less. The flange must be installed flush with the sheet surface, and the part meets the general performance criteria for concealed-head studs, including a minimum pullout resistance of 4,000 lbf in cold-rolled steel and 3,000 lbf in 5052-H34 aluminum.
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 | CHA-832-8 | CHA-832-8 |
| Product Name | Concealed-Head Studs - Types CHA,CFHA,CHC,CFHC - Unified | Concealed Head Studs |
| Attachment | Pressed | Threaded |
| Shape | Round | |
| Design Units | English | English |
| Inch | # 8 | # 8 |
