Metallics JDS184V 10 x 1-1/2 in. 5/16 Indented Hex Head Slotted Sharp Point Tapping Screws - Steel Zinc - Each

A Type A tapping screw like the JDS184V cuts its own thread but does not drill its own hole. The gimlet (sharp) point starts in a pre-punched or pre-drilled pilot hole in sheet metal, or bites directly into wood and fiberboard. If you need to go through unpunched steel in one pass, you want a self-drilling screw with a drill point instead. Thread count here is 12 per inch, which is the coarse spacing Type A uses for thin gauge sheet and wood.

Both are flagged compliant on the JDS184V, which is what a public-funded or federally funded spec usually asks for. Country of origin is listed as multiple, so if your contract requires a single named country of manufacture on the submittal, confirm the origin on the lot you receive.

#10 diameter, 1-1/2 inch long, with a 5/16 inch indented hex washer head. That length lets you pass through a layer of drywall or plywood and still get thread engagement into the substrate behind it, so it is a common pick for mounting boxes, straps, and brackets rather than thin sheet-to-sheet work.

The JDS184V is carbon steel with a zinc plated finish, which handles indoor and intermittently damp service but is not a marine or sustained-wet-exposure coating. For permanent exterior or corrosive duty, step up to stainless or a hot dip galvanized fastener.

They ship as a 500 count jar, and 500 pieces is the order minimum. Price and listing read per each, but the sell unit is the full jar.

Head dimensions follow ASME B18.6.3-2010 and the thread follows ASME B18.6.4. The steel is AISI 1016 to 1024, case hardened to Rockwell C28-38, with a minimum torsional strength of 48 lb-in. Those are the four numbers a spec reviewer typically asks for on a tapping screw.

Yes, the indented hex head is formed with an integral washer face measuring 0.384 to 0.414 inch outside diameter and 0.019 to 0.031 inch thick. Head height runs 0.105 to 0.12 inch. That bearing surface spreads load over a slotted strap or a box hole without a separate washer, though it will not bridge an oversized hole.

The JDS series runs other diameters and lengths beyond the #10 x 1-1/2 inch JDS184V, and other pack quantities, available by request. One caution from the manufacturer: #9 diameter dimensions in this family are independent of ASME B18.6.4, so if your spec calls out that standard, stay with a diameter other than #9.