This Gloxco brand standard wing nut assembly (wingnut assembly) is a replacement parts which is commonly found on vacuum tanks, manways, vacuum trailers, vacuum trucks, frac tanks, storage tanks, and pressure vessels. Our wingnut assemblies include a wing nut, clevis pin, cotter pin, eye bolt, and washer. These manway wing nut assemblies are non code. This means that they cannot be used on tanks that store or haul corrosives, explosives or combustible materials. This wing nut assembly does not include a grease cap.