Marine & Boat Rubber Washers

(36 products)

Saltwater-duty rubber washers for thru-hull fittings, deck hardware, rail mounts, transducers and dock equipment — larger diameters and thicker profiles that seal bedding hardware and isolate vibration in wet, UV-exposed conditions. EPDM shrugs off sun and seawater; Neoprene resists fuel splash around engines; Silicone handles temperature extremes.

Pick materials with the marine washer guide, convert metric hardware with the mm tables, or enter exact dimensions in the Washer Size Finder to search all 1,700+ sizes. Bulk pricing for boatyards and riggers on every size.