Metallics JW114SS Washers 1/4 X 1-1/2 Fender SS (Jar 100)

The JW114SS is a 1/4 inch fender washer with a 1-1/2 inch outside diameter, so it slips over 1/4-20 or 1/4 inch rod, bolts, and threaded hangers. The oversized OD is the whole point: it spreads the clamp load across a much wider bearing surface than a standard 1/4 inch flat washer, which is what you want on sheet metal, drywall, fiberglass, or slotted strut where a small washer would pull through.

Stainless steel construction, so these fender washers are the ones to reach for on exterior condenser pads, rooftop equipment, damp mechanical rooms, and anywhere a plated washer would bleed rust onto a finished surface. If the mating bolt or strut is plain zinc, pair hardware materials deliberately rather than mixing at random.

Yes, that is the intended use. Metallics lists the JW114SS for the electrical, plumbing, heating and air conditioning trades, and the wide 1-1/2 inch OD on a 1/4 inch hole is what keeps a nut from pulling through a strut slot, a knockout, or an oversized drilled hole in enclosure sheet metal.

Same bore, much bigger body. A standard 1/4 inch flat washer has an OD a little over half an inch; the JW114SS fender type runs 1-1/2 inches across. Use the standard flat washer against solid steel where you only need to protect the surface under the nut. Use the fender washer when the material is thin, soft, slotted, or the hole is oversized and you need to spread the load so the fastener does not pull through.

It will. The JW114SS bore is sized for 1/4 inch fasteners, so it drops over 1/4-20 all-thread, and the 1-1/2 inch face gives a nut real bearing against unistrut, plywood backing, or a trapeze clamp. For 3/8 inch rod, which is more common on larger pipe and duct trapezes, you need the 3/8 inch fender washer instead.

They ship 100 to a jar, packaged in a screw-top jar rather than a bag, which is why they stay sorted on a service truck or in a shop bin. Jar weight is 2.82 lbs.