Metallics TXW14112 Screws 1/4-14 X 1-1/2 Hwh Bond Wshr S (Jar 100)

Each jar holds 100 screws. Metallics packages the TXW14112 in a jar rather than a bulk box, so a single order unit covers 100 fastening points.

The bonded washer is a sealing washer fixed to the underside of the hex washer head. As the screw seats, the washer compresses and seals the hole against water intrusion, which is why this style is used on exterior sheet metal, roof and wall panel work, and weather-exposed electrical mounting rather than a plain hex washer head screw.

That is the application it is sold for. The TXW14112 is catalogued by Metallics as an electrical fastener, and the sealing washer under the hex head is what makes it suitable where the fastening point is exposed to weather, such as strut, panel, or box mounting on an exterior wall. For dry interior work with no water exposure, a plain hex washer head screw without the bonded washer does the same job.

Order it as Metallics TXW14112. That number covers the 1/4-14 by 1-1/2 inch hex washer head screw with the bonded sealing washer, packed 100 to a jar, and it is the only configuration under that part number.

With 1-1/2 inches of overall length, you have to leave enough thread engaged in the base material after passing through whatever you are fastening. Figure the thickness of the strap, clip, or panel you are attaching, subtract it from 1-1/2 inches, and what remains is the engagement depth into the substrate. That is why this longer 1-1/2 inch version gets specified over shorter 1/4-14 screws when there is a spacer, insulation, or a thick bracket in the stack.