Metallics RSB89 8-32 x 2 in. Round Head Combo Stove Bolt Screws with Hex Nut - Steel Zinc - Each

Nuts are included. The RSB89 ships with hex machine screw nuts matched to the 8-32 thread, so you don't need to source them separately. That is the practical difference between a stove bolt like this and a loose machine screw: bolt and nut arrive together for through-bolting box ears, straps, and sheet metal brackets.

Two inches is a long grip for an 8-32. The RSB89 is meant for stacked or spaced assemblies, mounting through box ears plus a spacer, plaster ring, or strut, where you need thread reaching well past the joint. For flush device mounting in a single box ear you'll have excess thread sticking out past the nut. Measure your combined stack first; shorter lengths in the RSB series exist for tight joints.

Yes, 8-32 with 32 threads per inch, right hand, is the standard machine screw thread used for device mounting and box grounding hardware in North America, so it picks up tapped 8-32 holes in boxes, straps, and covers. Dimensions follow ANSI B18.6.3, the machine screw standard, so the thread and head geometry are to spec rather than proprietary.

No. The RSB89 is not Buy American compliant and is not ARRA compliant; country of origin is listed as multiple. If your specification carries a domestic-content clause, this part will not satisfy it and you need a domestically produced machine screw instead.

A #2 Phillips fits the recess on the RSB89, and the same head also takes a flat blade because it is a combo slot/Phillips drive. The Phillips recess runs 0.165 to 0.178 inch in diameter at 0.101 inch deep; the slot is 0.045 to 0.054 inch wide and 0.058 to 0.077 inch deep, so a standard 3/16 cabinet-tip screwdriver seats in it. Handy on a ladder when you only have one driver on you.

Head height is 0.107 to 0.12 inch with a head width of 0.287 to 0.309 inch, so it stands proud like any round head, it does not countersink. If you need the fastener flush with a cover plate or a sliding part, a round head is the wrong choice and you want a flat head instead. The wider bearing surface is an advantage when you're clamping thin sheet metal that a small head would pull through.

The RSB89 is zinc plated carbon steel, made from AISI 1006 to 1022 stock. Zinc plating handles indoor and protected damp-location work fine, but it is not a marine or continuously wet finish; in exterior, coastal, or wash-down areas plated steel will eventually bloom and rust, and stainless is the right call there.

Minimum tensile strength is 60,000 psi with a hardness of Rockwell B70 to B100, which is ordinary low-carbon machine screw material. That is plenty for hanging boxes, straps, clamps, and light brackets, but it is not a structural or grade 5 fastener. Run it snug with a hand driver; a #8 shank will twist off under an impact driver long before the joint is any tighter.

A stove bolt is a machine screw with a blunt end and a matching nut, so it needs either a tapped hole or a clearance hole with the nut on the back. Use the RSB89 where you can reach both sides of the joint or where the hole is already tapped 8-32. Where you only have access to one side and the base metal is thin and untapped, a self-tapping sheet metal screw is the correct fastener instead. Typical use here is electrical, plumbing, heating, and air conditioning work.

They sell by the jar of 100, which is also the order minimum. Packaging is a clamshell jar, so it stacks in a van bin and you can pour out a handful without losing the rest.