Metallics TPPB10241 Screws 10-24 x 1 One-Way Partition Bo (100 pcs)

The Metallics TPPB10241 is a one-way tamper-resistant screw in 10-24 thread by 1 inch length. The head drives in with a standard flat blade, but the slot is ramped so the blade cams out when you try to turn it counterclockwise, which means it cannot be backed out with a normal driver once seated. That is the whole point of using it on toilet partitions, restroom accessories, and electrical enclosures in public buildings instead of a conventional slotted or Phillips screw. Plan on it being a permanent fastener, removal takes a special extractor or drilling the head out.

10-24 is a machine screw thread, not a self-tapping or wood thread, so it needs mating threads to pull against: a tapped hole, a weld nut, a threaded insert, or a 10-24 nut or barrel on the back side. Partition hardware and restroom accessory mounting brackets are typically supplied with the matching barrel nut or tapped bracket. Nuts and barrels are not part of the TPPB10241 pack, it is screws only, 100 pieces.

Yes, that is a common use for one-way screws like the Metallics TPPB10241. Where a cover plate, junction box lid, or device enclosure in a school, transit station, or correctional or public restroom area needs to stay closed against casual tampering, a 10-24 one-way screw replaces the standard cover screw and defeats a pocket screwdriver. The thread has to match the existing tapped hole in the cover or box ear, 10-24 is the usual size on many commercial covers but confirm the hole you are replacing into before ordering the 100 piece pack.

Each pack of the TPPB10241 is 100 screws, all 10-24 x 1 one-way partition bolts. For a partition retrofit, count two to four fasteners per bracket and allow a few extras, since a one-way screw driven in the wrong hole is not coming back out for reuse.