Metallics JW112SS Washers 3/16 X 1 Fender SS (Jar 100)

The JW112SS is a 3/16 inch fender washer with a 1 inch outside diameter, so it suits 3/16 inch bolts, screws, or threaded rod. The bore is sized for the fastener itself, not for metric equivalents, so if you are running M5 hardware check the shank will pass before you commit.

That is exactly what the oversized face is for. With a 1 inch outside diameter against a 3/16 inch hole, the JW112SS spreads load over a much larger bearing surface than a standard flat washer of the same bore, which is what keeps a fastener from pulling through drywall, thin gauge sheet metal, or soft panel material.

They are stainless steel, so they hold up in wet and outdoor work far better than plain or zinc plated washers. Typical use is electrical, plumbing, heating and air conditioning work, including rooftop and mechanical room mounting where condensation and weather are a factor.

One hundred washers per jar. The jar pack is the shipping unit, so ordering one gets you 100 pieces, and the whole container weighs 0.83 lbs. For a crew doing repetitive panel or strut mounting, the jar keeps them from scattering in a gang box.

Bore is the same, face is not. A standard flat washer in 3/16 has an outside diameter only slightly larger than the hole, so it bears on a small ring of material. The JW112SS fender washer takes that out to a full 1 inch, trading thickness and stiffness for spread. Use the flat washer against steel or hardwood where crush is not a concern, and the fender washer where the substrate is thin, oversized-drilled, or soft.

Yes, within the 1 inch face. The washer will bridge any opening smaller than that around a 3/16 fastener, which covers most over-drilled knockouts and slop in mounting holes on enclosures and brackets. Anything wider than 1 inch needs a larger washer or a backing plate.