Metallics JFW19 4 x 5/8 in. Flat Head Slotted Wood Screws - Steel Zinc - Each

Yes, if the hole is countersunk. The Metallics JFW19 is a flat head screw with a head height of 0.067 in. and a head diameter between 0.195 and 0.225 in., so it seats into a standard countersink and finishes flush with the surface. On a flat, non-countersunk plate the head will stand proud by that 0.067 in.

The JFW19 is flagged compliant for both ARRA and Buy American in the product record, with country of origin listed as China. On a federally funded job, submit those flags with your documentation so the specifying authority can confirm against the clause in your contract.

The JFW19 sells in a 100-count jar. Minimum order is 100 pieces, so you are buying the jar rather than loose screws, which suits a van stock or shop drawer item.

A slotted (flat blade) screwdriver. The slot runs 0.031 to 0.039 in. wide and 0.02 to 0.03 in. deep, so a small cabinet-tip blade, not a wide general purpose flat tip, keeps the blade in the slot and avoids camming out of a #4 head.

The JFW19 has a tapered point, which is a wood screw gimlet-style point meant to start in softwood without a pilot. In hardwood, oak trim or a hardwood jamb, pre-drill a pilot: a #4 shank is thin and the slotted head gives you limited torque before the slot deforms.

Keep them inside. The JFW19 is steel with a zinc finish, which handles indoor humidity and general interior work but is not a weather-exposed or treated-lumber fastener. For exterior trim, decks or ACQ-treated wood, go to a hot-dip galvanized or stainless wood screw instead.

Dimensions and threads follow ASME B18.6.1, with the thread specification cited as ASME B18.6.1-1997. That is the recognized wood screw standard, so head, slot and thread geometry match any other B18.6.1 #4 screw you already specify.

At 5/8 in. overall, the JFW19 is a light-duty fastener for thin attachments, device straps, small plates, hinge-free trim pieces, where penetration into the wood is a fraction of an inch after the material thickness. If you are anchoring anything that carries load into a stud, step up to a longer screw.

Nearly all of it. The JFW series runs 22 threads per inch, and on short screws like the 5/8 in. the threads extend as close to the underside of the head as practical, since the length is too short to carry the standard two-thirds thread rule that applies at 1 in. and longer. Expect close to full engagement in the substrate, with little smooth shank to clamp against.