Metallics W119M Washers 3/8 X 1-1/4 Fender St-zn (Box 1000)

The W119M is a 3/8 inch fender washer, so it goes over 3/8-16 threaded rod or a 3/8 inch bolt or screw. The 1-1/4 inch outside diameter is what makes it a fender washer rather than a standard flat washer, spreading the load well beyond the bolt head.

Yes. The W119M's 3/8 inch bore slips over 3/8 inch all-thread, and the 1-1/4 inch OD gives a nut something to bear against on strut slots, channel, or oversized holes in a hanger bracket. Pair it with a 3/8 nut; the washer itself is sold on its own.

Use a fender washer like the 3/8 x 1-1/4 W119M when the surface under the fastener is soft, oversized, or already has a hole bigger than the bolt. The wide 1-1/4 inch OD bridges that opening and spreads clamping load across sheet metal, drywall, plywood, or a slotted strut hole. A standard 3/8 flat washer has a much smaller OD and will pull through or dish those materials.

The W119M is zinc plated steel, which handles indoor and sheltered damp locations fine. For direct weather exposure, salt, or wet-location use where corrosion is a long-term concern, stainless or hot-dip galvanized washers are the better call; zinc plating is a thin sacrificial coating.

They ship 1000 to a box, which is a single bulk pack rather than a counter carton. The full box weighs 20.9 lbs, so it is a reasonable one-hand carry for a service van or a strut-mounting job that eats washers by the handful.

Yes, the 3/8 x 1-1/4 fender washer is built to ANSI dimensional standards, so the bore and outside diameter interchange with other ANSI-spec 3/8 fender washers already in your stock.

Order Metallics W119M. That is the manufacturer part number for the 3/8 x 1-1/4 steel zinc fender washer in the 1000-count box; there are no finish or size options to specify beyond it.

The box measures 7.25 x 6.25 x 6 inches and weighs 20.9 lbs, so it stacks on a standard shelf or in a parts bin row without overhang. Useful to know if you are standardizing fastener stock across a shop or MRO crib.