Metallics TXV12112VLB 12-24 x 1-1/2 in. 5/16 Hex Head Heavy Duty Drill Screws - #5 Drill Point - All-Weather - Each

No. The TXV12112VLB is flagged not Buy American compliant and not ARRA compliant, with country of origin listed as multiple. If your project has domestic sourcing language in the spec, this part number will not clear it.

12-24 is the fine machine thread pitch, 24 threads per inch, made to SAE J78-2013 for self-drilling tapping screws. Fine thread is what you want in heavier steel, because the shallower thread cuts cleanly into the hole the drill point makes and gives you more thread engagement in a 0.110 to 0.210 in. panel. Coarse 12-14 is the one to use in thinner gauge.

The TXV series carries a zinc plus all-weather coating, which is the topcoat Metallics puts on fasteners meant for exterior and damp interior steel-to-steel work such as rooftop equipment supports, strut, and outdoor enclosures. It is a coated carbon steel screw (AISI 1016-1024), not stainless, so for salt spray or submerged conditions a stainless fastener is the better call.

Minimum torsional strength is 92 lb-in, with case hardness at Rockwell C32-40. That hardness range is what lets the point drill steel without the shank shearing. Set your screwgun clutch below that 92 lb-in figure, especially on the thinner end of the panel range where the screw seats before the driver has slowed down.

It has an integral washer face under the hex head, 0.398 to 0.432 in. outside diameter and 0.022 to 0.039 in. thick. That is a bearing surface to spread clamp load, not a bonded EPDM sealing washer. If you are fastening through a weather surface that has to stay watertight, you need a separate bonded washer or sealant.

Order minimum is 1 each, so you are not forced into a full jar. The factory pack is a jar of 320. Other sizes and quantities in the TXV line are available by request.

Head and body dimensions follow ASME B18.6.3-2010, with threads to SAE J78-2013 and material to AISI 1016-1024. If a drawing calls out a B18.6.3 hex washer head self drilling screw in 12-24 x 1-1/2, this Type BSD screw answers that callout.

At 1-1/2 in. the TXV12112VLB is sized for stacking a bracket, clip, or strut channel on top of a 0.110 to 0.210 in. steel member and still having unthreaded drill flute clear the hole. If the combined thickness of what you are fastening plus the base steel is under about an inch, a shorter TXV length drives faster and leaves less protruding point on the back side.