CSOS-440-12 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), providing a threaded internal designation for mating hardware while maintaining a smooth, unmarred surface on the opposite side. It requires a blind hole of specified diameter and minimum depth for installation using a PEMSERTER or HAEGER press with the recommended tooling. The fastener is made of stainless steel with no finish, compatible with sheet hardness up to HRB 70 / HB 125, and meets ASME B1.1 2A/2B thread standards. The head remains flush with the sheet surface after installation, supporting ingress protection requirements.
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-440-12 | CSOS-440-12 |
| Product Name | Stainless Steel Standoffs - Types CSS, CSOS - Unified | Stainless Steel Standoffs |
| Type & Shape | Standoff; Round | Standoff |
