F4-440-1 by PENN ENGINEERING

The PEMSERT® F4-440-1 is a premium self-clinching flush nut engineered to provide permanent, load-bearing internal threads in ultra-thin metal fabrications without any profile protrusions. Manufactured from high-strength heat-treated 400 Series Stainless Steel, this specialized unified fastener is uniquely optimized to install and perform exceptionally well within rigid stainless steel host sheets. When integrated using standard parallel pressing equipment, the nut's hexagonal head completely embeds into a pre-drilled round hole, prompting the surrounding host metal to cold-flow seamlessly into its precision undercut. This robust mechanical attachment delivers immense axial and torsional strength while ensuring both the top and bottom of the sheet remain flat, enhancing both the functional engineering clearances and the cosmetic qualities of the final assembly.

Completely Flush Installation embeds entirely into the host panel so both the top and bottom sheet surfaces remain perfectly flat and obstacle-free.

Heat-Treated 400 Series Stainless Steel provides the extreme material hardness required to successfully clinch into demanding stainless steel host sheets.

High-Strength Hexagonal Head works alongside the proven self-clinching geometry to guarantee superior resistance against heavy rotational torque-out and axial pullout forces.

Streamlined Cosmetic Quality eliminates protruding hardware profiles to support ultra-tight component packaging and pristine external industrial designs.