Metallics W116V Washers 1/4 X 1-1/4 Fender St-zn (Box 500)

The W116V is a 1/4 inch fender washer, so it goes over 1/4-20 or 1/4 inch bolts, lags, and threaded rod. The 1-1/4 inch outside diameter is what makes it a fender washer rather than a flat washer: five times the bolt diameter of bearing surface, which is what you want when you are pulling a fastener through sheet metal, drywall, or a soft substrate that a standard 1/4 flat washer would dish through.

They are zinc plated steel, which handles indoor, dry, and generally damp interior work. Zinc plating is a sacrificial coating, not stainless, so for direct weather exposure, coastal air, wash-down areas, or anything in constant moisture, specify a stainless fender washer instead. For interior strut, panel, and box mounting the zinc finish is the normal spec.

500 pieces per box, packed as a box rather than a bag or carton. Shipping weight on the box is 8.04 lbs, which works out to roughly a quarter ounce per washer. If you only need a handful for a service call, that is a bulk quantity, so it suits shops standardizing a stock bin or a crew running repetitive panel and fixture mounting.

Use the fender washer when the material under the head is thin or soft. A 1/4 inch standard flat washer has a small outside diameter and concentrates load in a tight ring, so it pulls through gypsum, thin-gauge steel, or fiberglass panel. The W116V spreads that load across a 1-1/4 inch face. For bolting into solid steel, concrete anchors with their own bearing plate, or a tapped boss, a standard flat washer is enough and the larger washer just adds bulk.

Yes. The bore is sized for 1/4 inch fastener diameter, so it slides over 1/4-20 rod and threads on behind a nut. That is a common use on fixture hangers and trapeze supports where the washer bears against unistrut, channel, or a ceiling pan. Order the matching 1/4-20 nuts separately; washers only, 500 to a box.

The W116V is built to ANSI dimensions, so the 1/4 inch bore and 1-1/4 inch outside diameter interchange with any other ANSI-dimensioned 1/4 fender washer already in your stock bin. Country of origin is listed as multiple, so individual boxes may ship from different plants while holding the same dimensional spec.