Metallics TP608SFC Screws 10 x 1/2 FH Star Pin TR SMS 18-8 (100 pcs)

It's a #10 x 1/2 inch sheet metal screw with a flat head, made from 18-8 stainless steel, and it ships 100 pieces to the pack. The drive is a star (Torx style) socket with a center pin, which is the tamper-resistant version, so a standard star bit won't engage it.

You need a security star bit with a hole bored down the center so it clears the pin in the middle of the recess. A plain Torx bit will bottom out on the pin and won't seat. Size the bit to a #10 flat head star screw and keep a couple in the van, since these are the fasteners nobody can back out with a standard driver.

18-8 stainless is the standard austenitic grade used where plated carbon steel would rust, so these #10 x 1/2 inch screws are suited to damp interior rooms, covered exterior work, and enclosures that see condensation. For direct coastal salt spray, a 316 stainless fastener is the better call.

Yes. The TP608SFC has a flat (countersunk) head, so it needs a chamfered or countersunk seat to finish flush. Sheet metal and factory-punched enclosure holes are usually dimpled for this already; on flat bar or plate you'll want to countersink, or the head sits proud and the tamper-resistant face is easier to grab with pliers.

That's exactly the use case. A tamper-resistant pin-in-star drive means maintenance staff with the right bit can open a cover while the general public can't, which is why these get specified on device plates, junction box covers, and panel trim in schools, transit areas, correctional work, and multi-family common areas. The 1/2 inch length suits thin sheet steel and plastic covers rather than thick stock.