Concealed-head self-clinching studs install permanently in steel or aluminum sheets as thin as 0.062 in. (1.6 mm) and provide reusable threads for mating hardware while leaving the opposite sheet surface smooth and unmarred. The CHC-632-6 is a #6-32 threaded stud with a 0.071 in. nominal shank diameter, designed for use in steel or aluminum sheets with hardness up to HRB 70 / HB 125. Installation requires a blind hole of 0.138 in. diameter and a minimum depth of 0.213 in., with a minimum 0.160 in. distance from the hole center to the sheet edge. It is installed using a press and is compatible with NAS63540/4 specifications when ordered accordingly.
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-632-6 | CHC-632-6 |
| Product Name | Concealed-Head Studs - Types CHA,CFHA,CHC,CFHC - Unified | Concealed Head Studs |
| Attachment | Pressed | Threaded |
| Shape | Round | |
| Design Units | English | English |
| Inch | # 6 | # 6 |
