Metallics TP615SFC Screws 14 x 3/4 FH Star Pin TR SMS 18-8 (100 pcs)

A star pin bit, meaning a Torx driver with a center hole to clear the pin in the middle of the recess. A standard Torx bit will not seat on it. That center pin is what makes it tamper resistant, so plan on carrying the matching pin-in-star bit to the job.

They're 18-8 stainless, which is the common 300 series austenitic grade used for general corrosion resistance. That suits exterior and damp locations better than plain or zinc plated steel. For salt spray or coastal exposure, 316 stainless is the step up.

Tamper resistant fasteners like the TP615SFC are used where you don't want the public opening something up: enclosure and device covers, exterior fixtures, transit and detention spaces, vandal prone areas. A normal Phillips or slotted sheet metal screw comes out with anything in a pocket. The pin-in-star recess needs a specific bit, which is enough to stop casual removal while still letting your crew service the box.

Flat head means the head is conical and meant to seat flush in a countersunk or dimpled hole. Driven into a plain drilled hole in flat sheet, the head will stand proud. If you need the head to sit on top of the material, a pan or hex washer head is the right choice instead of this flat head version.

100 pieces per box. If you're standardizing tamper resistant hardware across a building, count one box per 100 cover or plate screws and keep a spare pin-in-star bit with each kit, since those bits wear and the screws are useless without one.

Yes. Sheet metal screws thread into a pre drilled or punched hole rather than cutting their own path like a self drilling point. Drill the pilot to suit the gauge you're fastening into, countersink it for the flat head, then drive with the pin-in-star bit.