Metallics JQK525V Screw 10 x 3/4 Hx 5/16 Hd Combo S-Pt (Jar 500)

It's a #10 by 3/4 inch screw with a hex washer head taking a 5/16 inch hex driver, and the head is also combo drive, so you can run it with a 5/16 socket or drive it with a screwdriver bit. The 5/16 hex is the same driver size used on most sheet metal and panel screws, so one bit in the impact handles the whole run.

It's a sharp point (S-Pt) screw, not a self-drilling point. Sharp point screws pierce their own way into wood, drywall, and thin soft materials, but they won't cut through steel the way a drill point will. For attaching to steel studs, strut, or anything heavier than light gauge, use a self-drilling point screw instead or pre-drill.

No. The sharp point on this #10 x 3/4 screw is made for wood and soft material, and 3/4 inch of length gives you very little thread past a metal flange. For steel studs, strut, or metal-to-metal fastening, move to a self-drilling (drill point) screw in the same #10 diameter and the same 5/16 hex head so your driver doesn't change.

500 pieces per jar. Metallics packs these in a screw-top jar rather than a box, which is why electricians keep them on the van, the lid stays on in a bouncing truck and you can pour out a handful without spilling the lot.

This is a general-purpose electrical fastener, sold under the Metallics electrical supplies line. The hex washer head gives a wide bearing surface that seats against sheet metal without pulling through, which is why #10 hex head screws are the standard pick for mounting boxes, straps, clamps, covers, and brackets to wood framing and soft substrates. The 3/4 inch length keeps the point from blowing through a single stud face.