CFHC-M4-12 concealed-head self-clinching studs install permanently in steel or aluminum sheets as thin as 1.6 mm to provide reusable M4 threads, leaving the opposite surface smooth and unmarred. They require a blind hole with a minimum depth of 7.37 mm and a hole diameter of 4.03 mm, and are installed using a press with a hollow anvil and solid punch. The studs are made of stainless steel and are passivated for corrosion resistance. They are rated for installation in sheet materials with hardness up to HRB 70 / HB 125. Installation torque for M4 threads is 2 N·m in cold-rolled steel and 1.78 kN insertion force in 5052-H34 aluminum.
These studs ensure permanent mounting in metal sheets as thin as 1.60mm.
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-M4-12 | CFHC-M4-12 |
| Product Name | Concealed-Head Studs - Types CHA,CFHA,CHC,CFHC - Metric | Concealed Head Studs |
| Attachment | Pressed | Threaded |
| Shape | Round | |
| Design Units | Metric | Metric |
| Metric | M4 | M4; M4 x 0.7 |
