Metallics TP112SBC Screws 10-24 x 3/4 Btn Hx Pin TR MS 1 (100 pcs)

The TP112SBC is a 10-24 x 3/4 inch machine screw. The 10-24 thread is a machine screw thread, so it goes into a tapped 10-24 hole or takes a 10-24 nut, not into bare sheet metal or wood like a self-tapping screw would. The 3/4 inch length is the usable shank, measured below the button head.

A pin-in-hex driver. The TP112SBC head has a hex socket with a pin standing up in the center, so a standard hex key or Allen bit will not seat in it. You need the matching pin-in-hex (tamper-resistant hex) bit, which is what makes the screw difficult to remove with ordinary tools in a public or exposed location.

Pin-in-hex screws like the TP112SBC are used where a cover, plate, enclosure, or fixture is in reach of the public and you do not want it opened with a pocket tool. Common uses are device plates, panel and box covers, and fixture housings in schools, transit areas, correctional work, and multi-family common areas. Mechanically it still behaves like a 10-24 machine screw, so the only change to the install is the driver.

No. It is a machine screw, which means the mating hole has to already be threaded 10-24 or backed with a 10-24 nut. If you are fastening into unthreaded sheet metal you need a self-drilling or self-tapping tamper-resistant screw instead, or you need to tap the hole first.

100 pieces per box. For a plate or cover job, count the fastener holes per device and multiply, then add overage for dropped and cross-threaded pieces, since a replacement in a tamper-resistant head size is not something most trucks carry loose.