Metallics JFW129 6 x 3/4 in. Flat Head Slotted Wood Screws - Steel Zinc - Each

Yes, that is what the flat head is for. The Metallics JFW129 has a flat head with a head height of 0.083 in. and a head width of 0.244 to 0.279 in., so a standard 82 degree countersink sized for a #6 screw will let the top of the head finish flush with the surface. Without a countersink or a factory-countersunk plate hole, the head will stand proud.

They come packaged in a jar, and the order minimum is 100 count. So you are buying a jar of 100 of the #6 x 3/4 in. screws rather than picking individual pieces.

The JFW129 is a slotted drive screw, with a slot 0.039 to 0.048 in. wide and 0.024 to 0.038 in. deep. Slotted heads cam out easily under power and are normally driven by hand with a flat blade screwdriver. If you are running hundreds of screws off a cordless driver, specify a Phillips or square drive wood screw instead. Slotted is the right choice when you are matching existing slotted hardware, such as older switch plates, hinges, or trim.

These are steel with a zinc finish. Zinc plating is a mild corrosion barrier meant for dry interior service; in wet exterior work, pressure treated lumber, or coastal air it will corrode and stain. For outdoor fastening, use a hot dip galvanized or stainless wood screw instead.

Full length, effectively. Metallics notes that screws too short to accommodate the minimum thread length carry threads running as close to the underside of the head as practicable, and the two-thirds thread rule only kicks in at 1 inch and longer. At 3/4 in. you get thread nearly to the head, with a tapered point to start the screw in wood or a pilot hole.

Yes. The JFW129 is made to ASME B18.6.1, with threads to ASME B18.6.1-1997 at 18 threads per inch for the #6 diameter. That is the inch-series wood screw standard, so head, slot, and thread dimensions are controlled values rather than vendor-specific.

Metallics lists the JFW129 as both ARRA compliant and Buy American compliant. Country of origin is China, so if your specification demands domestic melt and manufacture rather than ARRA-level compliance, verify the clause your project is written to before releasing them.

Short #6 flat heads are the mounting screw for light duty wood attachment: securing device plates, mounting brackets, strap, low voltage enclosures, and trim to wood studs, blocking, or plywood backboards. At 3/4 in. there is not enough length for structural fastening, and the head needs a countersink or a countersunk plate hole to pull flush. Metallics catalogs the JFW series as electrical supplies for exactly this kind of attachment.

The tapered point will start in soft wood without help, but a traditional wood screw like this cuts rather than displaces. In hardwood, oak trim, or near the end or edge of a board, drill a pilot and countersink; a #6 screw driven dry into hardwood will twist off or split the stock. Pine, plywood, and softwood blocking generally take it with no pilot.