Metallics JSWN06D Washer 6 x 5/16 Nylon Flat Washers - (Jar 100)

The JSWN06D is a #6 nylon flat washer with a 5/16 inch outside diameter, so it seats on #6 machine screws and small sheet metal screws. The #6 bore is the hole size and the 5/16 inch figure is the overall washer diameter, which is what gives you the bearing surface against soft material.

Nylon is non-conductive, so a nylon flat washer isolates the fastener head from the part it bears against and won't create a metal-to-metal path the way a steel or zinc washer does. It also won't corrode or gall, and it protects painted or plastic panel faces from being dug into when the screw is torqued down. The JSWN06D is catalogued as an electrical fastener for exactly that kind of work. Where you need clamp load on a structural connection, use a steel washer instead.

Each jar holds 100 of the #6 x 5/16 nylon flat washers. The jar pack is the standard put-up for this item, which suits a service van or a shop bin rather than a bulk production run.

Yes, as long as the screw is a #6. The washer spreads the load of the screw head over a wider footprint on thin sheet or plastic, which keeps the head from pulling through or cracking the material, and the nylon body keeps the fastener electrically isolated from the panel face. Check that the 5/16 inch outside diameter clears any raised boss or recess around the hole.

It's a flat washer, not a shouldered bushing. A flat nylon washer bears under the screw head or nut but does not line the inside of the hole, so it will not insulate a screw shank passing through a metal hole. If you need the shank isolated as well, you need a shoulder washer, which is a different part.