Metallics TP236SFC Screws 1/4-20 x 5/8 FH Star Pin TR MS 18- (100 pcs)

It takes a pin-in-star (pin-in-Torx) security bit, not a standard Torx. The recess has a post in the center, so a plain Torx bit will not seat. You need the matching pinned star bit sized for a 1/4-20 head, and that bit is a separate purchase from the screws.

The point is to keep the public out of a box that is in a reachable place. The TP236SFC uses a star pin head that cannot be turned with a screwdriver, hex key, or ordinary Torx bit, so covers on panels, junction boxes, device plates, and outdoor enclosures stay closed unless a tech brings the pinned bit. Metallics catalogues it on the electrical side, which is the usual home for this style of fastener.

Flat head means a countersunk 82 degree head that finishes flush with the surface, so the mating hole has to be countersunk or the part has to be punched with a countersunk clearance hole. Drop it into a plain flat-drilled hole and the head will stand proud. If you want the head to sit on top of the material instead, a pan or button head is the better choice.

No. The TP236SFC is a machine screw, so it needs a pre-tapped 1/4-20 hole, a 1/4-20 nut, or a threaded insert. For thin unthreaded sheet you want a self-drilling or sheet metal screw instead, or you tap the sheet first.

Each pack is 100 pieces of the 1/4-20 x 5/8 flat head star pin screw. That quantity suits a shop stocking one size for repeat cover-plate and enclosure work rather than a single device replacement.