Metallics TXV14400 1/4-20 x 4 in. 5/16 Hex Head Heavy Duty Drill Screws - #5 Drill Point - All-Weather - Each

The TXV14400 carries a #5 drill point, which is the heavy self-drilling point used for thick steel-to-steel work, and the screw is 4 inches long so there is plenty of shank behind the point for stacked or spaced members. It is a 1/4-20 thread with 20 threads per inch, hardened to Rockwell C32-40, and rated to a minimum 150 lb-in torsional strength so it survives the drilling torque. Metallics lists it for construction and heavy duty steel-to-steel application.

Yes. Metallics lists the TXV14400 as both Buy American compliant and ARRA compliant, with country of origin United States. That covers federal, state, and institutional specs that require domestic fasteners.

Drive it with a 5/16 hex socket or a 5/16 magnetic nut setter in an impact or screw gun. The hex head measures 0.367 to 0.375 in. across the flats and 0.409 across the corners, with a head height of 0.172 to 0.19 in. No bit tip is involved, the head is hex drive only.

Yes. The TXV14400 has a zinc/all-weather coating, which is what Metallics specifies for exposed construction work such as rooftop strut, equipment supports, and exterior steel framing. It is not a stainless screw, so for standing water, coastal salt, or treated lumber contact you would want a stainless fastener instead.

There is an integral washer under the head, 0.480 to 0.520 in. outside diameter and 0.030 to 0.050 in. thick. That is a bearing washer, not a bonded EPDM sealing washer, so if the penetration has to be watertight you will need a separate bonded washer or sealant at the head.

Dimensions are to ASME B18.6.3-2010, threads to SAE J78-2013, and the steel is AISI 1016-1024 with a case hardness of Rockwell C32-40 and 150 lb-in minimum torsional strength. That is the data set most engineers ask for on a steel-to-steel fastener submittal.

A Type BSD screw like the TXV14400 drills its own hole and forms the thread in one pass, so no pilot hole and no second tool at the hole. That is the time saver on steel-to-steel framing, strut, and hanger work. A self-tapping screw with a pilot hole still makes sense where you need a controlled hole size, where the back side is inaccessible for the drill point to break through, or where the stack is thicker than the point can cut. For thick stacked steel, the #5 point on this screw is the heavier of the common point sizes.

They ship in a jar of 100, and 100 is the order minimum. The jar weighs 4.43 lbs. Metallics notes other sizes and quantities are available by request.

Not the same thing. The TXV14400 is a 1/4-20 thread at 20 TPI, but it cuts its thread in the steel it drills, so holding power comes from the engaged material thickness rather than from a nut on the back. Where the back side is thin sheet or inaccessible, use a through-bolt and nut instead. Where you have substantial steel to thread into, the drill screw cuts the labor out.