Metallics RM885M Screws 8-32 x 1-1/2 RH CD MS St-Zn (5000 pcs)

Yes. Electrical boxes, mounting straps, and device yokes in the US are tapped 8-32, and these are 8-32 machine screws, so they thread straight in. At 1-1/2 inches they're longer than the short screws that ship with a device, which is what you want when you're reaching through a thick mud ring, a deep plaster ring, or stacked spacers.

Machine screws such as the RM885M have a uniform, blunt-ended 8-32 machine thread and need a pre-tapped hole or a nut. They do not cut their own thread. If you're driving into bare, untapped sheet metal with no nut behind it, you want a self-tapping sheet metal screw instead. For electrical boxes, straps, and devices that come already tapped 8-32, the machine screw is the correct choice.

Round head with a combination drive, meaning the head is slotted and cross-recessed so it takes either a flat-blade or a Phillips driver. Round head sits proud of the surface, so use them where the fastener head doesn't need to sit flush.

They're steel with a zinc plating. That's fine for dry interior work, panel and box mounting, and general indoor MRO. For wet locations, exterior use, or corrosive environments, step up to stainless.

5,000 pieces per box. That's a bulk contractor or MRO quantity, not a jobsite handful, so it suits an electrical shop stocking a common fastener, a service truck restock, or a facility crib standardizing on one 8-32 screw.

Usually yes. Standard device screws run about 1/2 to 3/4 inch, so a 1-1/2 inch 8-32 gives you roughly an extra inch of reach for extension rings, plaster rings, spacers, or stacked cover plates. Just make sure the extra length does not bottom out against conductors or the back of the box.