Metallics JRM85SB Screw 8-32 x 3/4 RH SL MS SBR (Jar 100)

Yes, as long as the box tab threads are still good. Device and box-tab holes in steel boxes are tapped 8-32, and the JRM85SB matches that thread at a 3/4 inch length, so it threads into the same hole as the original. If the tab itself is stripped out, no replacement screw will hold and you need a box-tab repair clip or a new box.

Round head, slotted drive. A flat-blade screwdriver drives it, which is why it stays common on electrical device and box work where an electrician is already carrying a slotted blade. The round head sits proud of the surface rather than countersinking, so it is for mounting hardware into tapped holes and box tabs, not for flush trim work. For a flush finish you want a flat-head screw instead.

It is a machine screw (MS in the description), meaning it has a uniform straight 8-32 machine thread meant to go into an already tapped hole or a nut. It will not cut its own threads in sheet steel. If you are fastening into an untapped hole or into drywall-mounted sheet metal, you want a self-drilling or sheet metal screw instead.

100 screws per jar. The jar pack is how these get bought for a service van or a shop bench, since loose device screws are the ones that walk off fastest on a punch list. One jar covers a lot of trim-out before you reorder.

Order it as Metallics JRM85SB. That designation covers the 8-32 x 3/4 round head slotted machine screw supplied 100 to a jar, which is the number a distributor or counter will want when you phone the order in.