Metallics TXV14400VLB 1/4-20 x 4 in. 5/16 Hex Head Heavy Duty Drill Screws - #5 Drill Point - All-Weather - Each

No. The TXV14400VLB is listed as not Buy American compliant and not ARRA compliant, with country of origin recorded as multiple. If your contract carries a domestic sourcing clause, this part number will not clear it and you need a certified domestic fastener instead.

A 5/16 inch hex socket or magnetic nutsetter drives it. The head measures 0.367 to 0.375 inches across the flats with 0.409 inches across the corners, and head height runs 0.172 to 0.19 inches. There is no Phillips or square recess, so it is socket drive only.

It carries an integral washer, with an outside diameter of 0.480 to 0.520 inches and a thickness of 0.030 to 0.050 inches. That spreads the bearing load under the hex head. The washer dimensions are what Metallics publishes; nothing in the spec identifies a bonded rubber or EPDM sealing element, so treat it as a metal bearing washer, not a weather seal at the fastener face.

Yes. The TXV14400VLB is finished in zinc with an all-weather coating, which is the reason Metallics puts it on exterior and exposed steel-to-steel work. It is a coated carbon steel screw (AISI 1016-1024), not stainless, so for continuously wet, coastal, or chemically aggressive settings a stainless fastener is the more durable choice.

Minimum torsional strength is 150 lb-in, with case hardness at Rockwell C32-40. That hardness range is what lets the point cut steel while the shank keeps enough toughness to resist snapping. Run an impact or screwgun with the clutch set rather than wide open, since exceeding that torsional figure is how these fail.

Yes. Head and body dimensions are built to ASME B18.6.3-2010 and the thread conforms to SAE J78-2013, the tapping screw thread standard. Steel is AISI 1016-1024. Those three citations are usually what a submittal reviewer wants on a self-drilling fastener.

No. The screw point type is a drill point, so the fastener cuts its own hole and taps the thread in one pass. Drill, tap, and fasten happen in a single operation, which is the whole point of a Type BSD screw on steel-to-steel connections. Keep steady pressure and let the point cut rather than spinning it.

They ship in a jar, and the order minimum is 1 each, so you are not forced into a full-case buy. Metallics notes other sizes and quantities in the TXV series are available by request if 4 inch is not the length you need.