Metallics TP825SOC Screws 10-24 x 2 OV Span TR MS 18-8 (100 pcs)

The TP825SOC is a 10-24 x 2 inch machine screw. The 10-24 designation is a #10 diameter with 24 threads per inch (a UNC machine screw thread), so it mates with a 10-24 tapped hole or a 10-24 nut, not with a sheet metal or wood substrate. Overall length under the head is 2 inches, which is what you need to check against the combined thickness of the cover plate and the box or channel you are fastening into.

It takes a spanner (snake-eye) bit, not a Phillips or a hex key. The head has two round holes set either side of center, so a standard screwdriver will not engage it at all. Order the matching spanner bit or spanner screwdriver in the #10 size range before the install, otherwise the fasteners cannot be driven or later removed.

These are 18-8 stainless, the common 300-series austenitic grade used for general corrosion resistance. That makes them suitable for damp and exterior locations such as outdoor device covers, wash-down areas, and coastal-adjacent interiors, where a plated carbon steel screw would rust and seize. For direct, constant salt immersion a 316 fastener is the stronger choice.

Tamper resistance. A spanner head cannot be backed out with anything in a normal tool pouch, so it is the usual pick for public-area work: restroom and corridor device plates, transit and school facilities, pull boxes, wireway and enclosure covers where you want to keep the public out. If the opening is in a secured mechanical room and nobody but maintenance reaches it, a standard Phillips or slotted machine screw does the same mechanical job for less hassle on service calls.

Oval head means a countersunk 82 degree underside with a low domed top, so it seats into a countersunk hole and leaves only a slight crown above the surface. It needs a chamfered or countersunk hole to pull in flush, not a flat-drilled one; on a flat unchamfered hole the bearing surface will not seat properly. If you need a fully flush face, a flat head is the right profile instead.

Sold 100 pieces to the pack under part number TP825SOC. That quantity covers a sizeable device-plate or cover change-out in one go, which matters with tamper-resistant hardware since you generally want every opening on a floor or building standardized on the same drive so one bit serves the whole job.