Metallics TP500SFC Screws 6 x 1/2 FH Hx Pin TR SMS 18-8 (100 pcs)

The TP500SFC is a #6 x 1/2 inch flat head sheet metal screw in 18-8 stainless steel, with a tamper resistant hex head that has a center pin. It ships 100 pieces to a box.

Yes. The TP500SFC uses a hex socket with a pin in the center, so a standard hex key or hex bit will not seat. You need a pin-in-hex (spanner-style hex) bit sized to the #6 head. Order the driver bit with the screws if you don't already carry one.

If what you are pulling out is a #6 x 1/2 inch flat head sheet metal screw, the TP500SFC matches thread size, length, and head style, so it goes back into the same hole. Only the drive changes, from slotted or Phillips to pin-in-hex, so budget for the security bit. Check that the existing hole is countersunk, since a flat head needs that to sit flush.

18-8 stainless (A2, roughly 304 grade) resists general atmospheric corrosion, so these hold up outdoors, in damp mechanical rooms, and in washdown areas far better than plated carbon steel. For coastal salt spray or pool chemical exposure, 316 stainless is the better call.

A flat head is designed to sit flush in a countersunk or chamfered hole, so on a stamped or punched cover with a countersink the head finishes level with the surface. On flat sheet with a straight drilled hole the head will stand slightly proud. The 1/2 inch length gives you shallow penetration, which suits thin sheet metal and cover plates rather than thick structural members.

Tamper resistant hex pin heads keep covers, enclosures, junction boxes, and device plates from being opened with common tools, which is what facility and institutional buyers want in corridors, restrooms, schools, transit areas, and any public-access space. The TP500SFC gives you that in a #6 x 1/2 inch sheet metal screw, so it drops into the same holes a standard #6 SMS used.

100 pieces per box, which covers a run of cover plates or enclosure lids without reordering mid-job. Sold under part number TP500SFC.

Sheet metal screw threads are fully threaded with a sharp, closely spaced thread meant to cut and hold in metal. They will bite in wood but hold poorly compared with a wood screw, and they are not a drywall fastener. At 1/2 inch, the TP500SFC is a thin-material fastener. For wood or anchors, use the fastener made for it.