CSOS-M3-16 by PennEngineering ® (PEM ® )

The PEM® CSOS-M3-16 is a high-performance concealed-head self-clinching standoff designed to establish robust, permanent metric internal threads for component spacing or mounting in thin metal sheet assemblies. Formed from high-grade 300 Series Stainless Steel, this metric-threaded fastener delivers exceptional physical durability and long-term corrosion resistance, making it an ideal selection for medical devices, consumer electronics, and industrial enclosures.Because the fastener head locks securely inside a milled blind hole, the exterior face of the host sheet opposite the installation remains completely smooth and unmarred. When integrated using standard parallel pressing tooling, the surrounding sheet metal cold-flows seamlessly around the standoff's head into its precision undercut, ensuring outstanding load capacity while delivering a flawless external aesthetic.

Concealed-Head Design installs directly into a blind, milled hole to ensure the exterior face of the sheet opposite the installation remains completely smooth and unmarred.

Environmental Panel Protection secures internal components by leaving the external panel face unpierced and fully closed to dust, liquid, and air.

300 Series Stainless Steel Constructionprovides strong structural longevity paired with dependable, long-lasting defense against localized atmospheric corrosion.Substantial Load-Bearing Capacity establishes an unyielding mechanical lock as displaced host metal flows smoothly around the fastener head inside the undercut.