Part of the ZaGO Sealing Nut Series, the Hex Flange Nuts provide superb sealing & extra fastening power with an extending built in washer. These ZaGO Hex Nuts feature a durable rubber seal, protecting the Flange Nut from any damage or contamination. KEY FEATURES • Hex Flange Nuts • Fully Sealed • Highly Durable ZaGO Hex Sealing Nuts can be fully customized, compatible with all types of conditions & environments. Delivering prolonged & enhanced performance from your equipment.