FREE shipping on orders over $9.95

Fast shipping — orders ship within 24 hours with tracking

Bulk & wholesale pricing available — request a quote

  • Free shipping over $9.95

  • Free help & advice

  • Hassle-free returns

  • Open 7 days a week
Assorted black rubber washers in various sizes

5/16" OD Rubber Washers

(8 products)

Shop rubber washers with a 5/16" outside diameter in all seven materials — Neoprene, EPDM, Nitrile, Silicone, Natural Rubber, Viton and Fiber — in thicknesses from 1/16" to 1/2". Ideal for electronics, small fasteners and precision sealing. Fast shipping and bulk pricing on every order.

New to sizing? Our size guide explains OD, ID and thickness, and the material guide helps you match the compound to your job. You can also shop by 5/16" inside diameter or browse the full catalog.
View as

  • Visit our support center

    Expert help & advice

  • Check your order status

    Updates & tracking

  • Returns & exchanges

    All you need to know

  • Price-match guarantee

    Our promise to you

Compare /5