Metallics TP601SFC Screws 6 x 3/4 FH Star Pin TR SMS 18-8 (100 pcs)

These are tamper-resistant star pin screws, so a standard Torx bit will not seat. The recess has a pin in the center, which means you need a pin-in-Torx (Torx-Pin / TR) bit sized to the recess. Keep a bit on the truck before you install them, because once they are driven you cannot back them out with a common Torx, Phillips or square driver. That is the whole point of the TR head on a #6 x 3/4 screw used on cover plates and enclosures.

They are 18-8 stainless, an austenitic 300 series alloy, so they hold up far better than plain or zinc plated steel in damp and outdoor conditions. 18-8 is the usual choice for exterior wiring devices, weatherproof covers and coastal-adjacent work. For continuous salt spray immersion, 316 is the step up, but for typical wet-location and exterior electrical use 18-8 is the standard spec.

Yes, that is the intended use. SMS means sheet metal screw thread, which is a coarse, fully threaded form meant to cut and hold in thin gauge steel, device boxes, enclosure flanges and sheet metal brackets. The 3/4 inch length suits a cover or plate against sheet metal; it is not a wood screw thread and it is not a machine screw, so it will not thread into the 6-32 tapped holes you find on standard device ears.

FH on the Metallics TP601SFC is a flat head, which is a countersunk head designed to sit flush with the surface when the hole is countersunk or the material is dimpled. If your plate or panel has a flat punched hole with no countersink, the head will stand slightly proud. For a raised bearing surface instead, you want an oval or pan head rather than this one.

TP601SFC is the Metallics part number for the #6 x 3/4 flat head star pin tamper-resistant sheet metal screw in 18-8 stainless, packed 100. Quote that number directly when matching existing tamper-resistant hardware on a facility, since the star pin recess is not interchangeable with standard Torx, square or Phillips fasteners.

One pack of TP601SFC is 100 pieces. That quantity is sized for crews standardizing tamper-resistant fasteners across a building, schools, transit, correctional or public restroom work, where every cover plate on the job gets the same star pin head so one bit covers the whole site.