CSOS-0420-6 is a stainless steel concealed-head self-clinching standoff designed for permanent installation in metal sheets as thin as 0.062 in. It provides a smooth, unmarred surface on the side opposite installation and requires only a blind milled hole for mounting. The fastener is installed using a press with a hollow anvil and solid punch, displacing sheet material to secure the flange flush with the surface. Installation tooling includes PEMSERTER® part number 975200048 and HAEGER® part number 970200018300. The part meets ASME B1.1 2B thread specifications and is passivated per ASTM A380 for corrosion resistance. It is recommended for use in sheet materials with hardness up to HRB 70 or HB 125. Tooling compatibility and dimensional data confirm it is part of the CSS/CSOS series for .420-20 threads.
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-0420-6 | CSOS-0420-6 |
| Product Name | Stainless Steel Standoffs - Types CSS, CSOS - Unified | Stainless Steel Standoffs |
| Type & Shape | Standoff; Round | Standoff |
