Metallics W116M Washers 1/4 X 1-1/4 Fender St-zn (Box 1000)

The W116M is a 1/4 inch fender washer, so it goes over 1/4 inch bolts, screws, and threaded rod. The 1-1/4 inch outside diameter gives you roughly a half inch of bearing surface all the way around the hole, which is the point of a fender washer: it spreads load across thin sheet metal, drywall, plywood, or an oversized or slotted hole that a standard flat washer would pull right through.

They are zinc plated steel, which handles normal indoor and protected outdoor exposure, including damp locations in mechanical rooms and under equipment. Zinc plating is a sacrificial coating, not stainless, so for direct salt spray, coastal exposure, or constant wetting a stainless washer is the better call.

One box holds 1,000 pieces, packaged as a box rather than a bag or carded pack, and weighs 18.97 lbs. That is a stocking quantity for a van or a shop bin, not a one-job count, so if you only need a few dozen for a single strut or panel job you are buying a lot of spares.

Yes. Fender washers like the W116M are routinely used with 1/4 inch strut hardware, threaded rod, and hanger assemblies where the mounting hole is oversized or the material is thin. Metallics lists the application range as electrical, plumbing, heating and air conditioning, plus concrete and masonry work, which covers rod hangers, box and panel mounting, and anchoring into block or concrete.

Same hole, much bigger body. A standard 1/4 inch flat washer has an outside diameter around 5/8 to 3/4 inch; the W116M is 1-1/4 inch across the same 1/4 inch bore. On sheet metal boxes, thin panels, and knockouts or slots that are wider than the fastener, the larger disc keeps the head from dishing through the material. If you are bolting through solid steel or a properly sized hole, a standard flat washer is enough and seats better in tight spots.

Yes, concrete and masonry are listed among the intended applications. Paired with a 1/4 inch sleeve, wedge, or screw anchor, the wide 1-1/4 inch face bears on the surface and bridges a chipped or oversized hole in block or slab, which is the common failure spot when a small flat washer sinks into spalled concrete.

If the existing bolts and strut fittings are zinc plated steel, the W116M matches, since it is steel with a zinc finish. For a fleet or facility standardizing hardware, the one thing to watch is mixing zinc washers with stainless or galvanized fasteners in wet locations, where dissimilar metals in contact accelerate corrosion.

Order by Metallics part number W116M. That designation covers the 1/4 inch by 1-1/4 inch zinc plated steel fender washer supplied 1,000 to a box.