Metallics TP212SFC Screws 10-24 x 3/4 FH Star Pin TR MS 18-8 (100 pcs)

It is a 10-24 x 3/4 inch machine screw, so a unified 10-24 machine screw thread (not a self-tapping sheet metal point) with a 3/4 inch length. It threads into a tapped hole or a matching 10-24 nut, which is what you want for enclosure covers, device plates, and panel hardware rather than raw sheet metal.

A pin-in-star (pin-in-Torx) bit, not a standard Torx. The head is a star recess with a post in the center, so a plain Torx driver bottoms out on the pin and will not seat. You need the matching pin-in-Torx security bit, and the pin is the whole point: it keeps someone without that bit from backing the screw out.

They are 18-8 stainless steel, the common 300-series austenitic grade used for general corrosion resistance. That makes them suitable for damp and exterior-exposed work such as outdoor enclosures, wet-location covers, and coastal-adjacent interior spaces, where a plain zinc-plated screw would rust at the head recess and become impossible to remove.

The TP212SFC is a flat head, which means a conical countersunk head that sits flush with the surface when the hole is countersunk to match. If your plate or enclosure has straight-walled, non-countersunk holes, the head will stand proud of the surface and you should look for a pan or truss head instead.

The reason is public access. In schools, transit areas, correctional work, restrooms, and multi-family common spaces, a Phillips or slotted cover screw can be removed with a coin or a pocket driver, which opens an enclosure or lets a plate be stripped. The pin-in-star head on these 10-24 screws requires a dedicated security bit, so they are the swap-in choice wherever the hole is already tapped 10-24 and you just want the fastener to resist casual removal.

One box of TP212SFC holds 100 screws. For a tamper-resistant standardization job, that typically covers a run of enclosures or device plates at two to four screws each, and ordering by the box keeps the whole facility on one head type so a single pin-in-star bit services everything.