CSOS-632-4 is a concealed-head self-clinching standoff designed for permanent installation in steel or aluminum sheets as thin as 0.062 in. (1.6 mm), leaving the opposite side smooth and unmarred. It installs using a blind hole with minimum depth and requires a HAEGER™ or PEMSERTER™ press with specified anvil and punch tooling. The fastener features a 1/4-28 thread and is made of stainless steel. It meets ASME B1.1 2B thread specifications and is suitable for use in sheets with hardness up to HRB 70 / HB 125. Installation torque for this thread size is rated at 8.75 in-lb in cold-rolled steel and 350 lbf in 5052-H34 aluminum. The part is certified to NAS63540/4 specifications when ordered under that designation. Appearance variations due to manufacturing have no effect on fit or function.
These standoffs 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.
Stainless Steel Standoffs
| PennEngineering® | bisco industries | |
|---|---|---|
| Product Category | Posts, Spacers, and Standoffs | Posts, Spacers, and Standoffs |
| Product Number | CSOS-632-4 | CSOS-632-4 |
| Product Name | Stainless Steel Standoffs - Types CSS, CSOS - Unified | Stainless Steel Standoffs |
| Type & Shape | Standoff; Round | Standoff |
