Metallics TP310SPC Screws 8-32 x 1-1/2 PN Span TR MS USA (100 pcs)

They're 8-32 x 1-1/2 inch machine screws, so a #8 diameter with 32 threads per inch and a 1-1/2 inch length. Machine screw thread, not a sheet metal point, so they need a tapped hole or a nut, typically the 8-32 tapped holes already in device boxes, covers and plates.

Yes. These are spanner head (two-hole, also called snake eye) tamper resistant screws, so a standard Phillips or slotted driver will not turn them. You need a spanner bit sized to the screw's pin spacing. Order the driver bits at the same time if you don't already keep them on the truck, since the screws ship without a tool.

For a plain wall plate on a flush box, 1-1/2 inches is long. That length is for deep applications: thick stone or tile plates, stacked plate and gasket assemblies, plaster rings, and pull box or junction box covers where the screw has to reach through added material. If you're just fastening a standard cover to a device yoke, specify a shorter 8-32 spanner screw instead.

Spanner head screws are specified where you don't want the public opening the device. Schools, transit stations, correctional facilities, restrooms, parks and multi-family common areas are the usual ones. The two-pin spanner recess can't be driven with any common screwdriver, so cover plates, pull boxes and device plates stay closed unless the maintenance tech has the matching bit. The TP310SPC is the 8-32 x 1-1/2 inch version for deeper mounting or stacked plates.

Pan head. It seats on top of the surface with a low rounded crown rather than sinking into a countersunk hole, so it works on flat-faced plates and box covers with a straight through-hole. If your plate is countersunk for a flat head, a pan head will stand proud of the face.

100 pieces per box, ordered as Metallics part number TP310SPC. That's the quantity that makes sense for a facility standardizing on tamper resistant hardware across a run of openings or device locations rather than a single repair.