CFHC-832-10 concealed-head self-clinching studs install permanently in steel or aluminum sheets as thin as 0.062 in. (1.6 mm) to provide reusable M4-0.7 threads. They require a blind hole with a minimum diameter of 0.179 in. and a minimum depth of 0.290 in., leaving the opposite sheet surface smooth and sealed. Installation uses a HAEGER® or PEMSERTER® press with anvil part number 970200008300 and punch part number 975200048. The studs are made from stainless steel and are passivated for corrosion resistance. They are rated for a maximum installation force of 4,800 lbf and a maximum tightening torque of 18 in.-lbf in cold-rolled steel. These fasteners meet NAS63540/4 specifications when ordered with the appropriate part number, and are recommended for sheet hardness up to HRB 70 or HB 125.
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-832-10 | CFHC-832-10 |
| Product Name | Concealed-Head Studs - Types CHA,CFHA,CHC,CFHC - Unified | Concealed Head Studs |
| Attachment | Pressed | Threaded |
| Shape | Round | |
| Design Units | English | English |
| Inch | # 8 | # 8 |
