Metallics RSB116 3/8-16 x 2 in. Round Head Combo Stove Bolt Screws with Hex Nut - Steel Zinc - Each

A hex machine screw nut ships with each bolt. The RSB116 is a 3/8-16 x 2 in. round head stove bolt and the nut is the matching hex machine screw nut, so you don't need to source threads separately for a through-bolted connection.

A 3/8 inch diameter bolt needs a 3/8 clearance hole, 13/32 if you want easy alignment on a field-drilled strut or box. The round head measures 0.67 to 0.708 in. across, so it covers a standard or slightly oversized 3/8 hole without a washer, and the head stands only 0.237 to 0.256 in. proud.

Yes. Dimensionally the RSB116 is built to ANSI B18.6.3, with steel per AISI 1006 to 1022, hardness Rockwell B70 to B100, and a minimum tensile strength of 60,000 psi. That is the standard specifiers reference for slotted and recessed head machine screws, so the head, recess and thread geometry will match a drawing written to it.

No. The RSB116 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. On a federally funded project with domestic sourcing requirements you need a domestically produced fastener instead.

Either a flat blade or a #4 Phillips. The head is a combination slotted/Phillips recess, with the slot 0.081 to 0.094 in. wide and 0.117 to 0.155 in. deep, and the Phillips recess 0.374 to 0.387 in. across and 0.228 in. deep. On an electrical install that means you can drive it with whatever is already on your belt, and the Phillips recess gives you more bite when you need to pull the joint tight.

The RSB116 is zinc plated steel, which is a dry indoor finish. It handles interior electrical rooms, mechanical spaces and panel work fine, but for exterior, wet locations or corrosive atmospheres you want stainless rather than zinc plating, since plated steel will start weeping rust once the coating is scratched by the driver or a wrench.

It sells in a jar of 100. If you need a different length or diameter in the RSB round head combo stove bolt line, other sizes and quantities are available by request.

They are stocked for the electrical, plumbing, heating and air conditioning trades, the general purpose bolt-and-nut fastener for hanging, bracketing and through-bolting equipment. The round head sits nearly flush at 0.237 to 0.256 in. tall, which keeps it out of the way where a conduit, panel cover or duct flange has to sit over the fastener.