Replacement 64mm Dust Cap O-Ring Seal Ring for Knott Hubs

This is a rubberized dust cap seal ring specially designed for Knott 64mm/2.46" Dust Caps. The o ring is used with the Zinc Plated Dust Cap 64mm for Sealed 1,500 lb Knott 5 Lug Hubs and Knott 2.46" Dust Cap and Plug for Posi-Lube and Ez Lube Axle to seal and waterproof the hubs from any intrusion. The Knott sealed hub is commonly seen on smaller boat trailers, jet ski trailers, and PWC trailers manufactured by Load Rite, Karavan, Magic Tilt, EZ Loader, and others.