Metallics TX12114SS 12-14 x 1-1/4 in. 5/16 Hex Head Metal to Metal Self-Drilling Screws with Bonded Washer - #3 Drill Point - 410 Stainless Steel - Each

The #3 drill point on the TX12114SS is rated for panel thickness of 0.110 to 0.210 inch. That covers metal panel into light steel framing such as purlins and bar joists. Thicker structural steel than 0.210 inch is outside what this point is specified to drill.

The bonded washer is already on the screw. Its outside diameter runs 0.398 to 0.432 inch and thickness 0.022 to 0.039 inch, so it seats under the 5/16 hex head and seals the panel hole without a separate EPDM washer being ordered.

Yes, that is the stated application. The 12-14 x 1-1/4 inch Type BSD screw is intended for attaching standing roof clips and wall or roof metal panels to steel framing such as purlin or bar joist. The 1-1/4 inch length gives enough thread to engage the clip and the framing member underneath.

A 5/16 hex driver. The head is hex type with hex drive, measuring 0.305 to 0.312 inch across the flats and 0.34 inch across corners, with head height 0.139 to 0.155 inch. A standard 5/16 magnetic nutsetter in a screwgun is what crews use on these.

The TX12114SS is made from 410 stainless steel, a hardenable stainless that drills its own hole while offering more corrosion resistance than plain carbon steel. Hardness is Rockwell C38-46 and torsional strength is 92 lb-in minimum, so it takes the drive torque needed to cut through panel and framing. The bonded washer seals the penetration at the panel.

These ship in a jar with a 50 each order minimum, so the smallest quantity is 50 screws. Metallics lists other sizes and quantities as available by request.

The TX12114SS is flagged Buy American compliant and ARRA compliant, which matters on federally funded work. Dimensions follow ASME B18.6.3-2010, threads follow SAE J78-2013, and the material standard listed is AISI 1016-1024.

Thread pitch is 14 threads per inch, which is the coarser of the two common #12 pitches and is what metal-to-metal screws use for holding in light gauge framing. Paired with the #3 drill point rated to 0.210 inch of panel, it cuts its own mating thread rather than relying on a pre-tapped hole. Going into material thinner than the 0.110 inch low end of the rated range is where thread engagement gets marginal.

A jar of the TX12114SS is listed at 0.81 lbs, with the container measuring 3 x 2.7 x 3 inches.