Part of the ZaGO Sealing Nut Series, the Low Crown Acorn Nuts are quality Military Sealing Nuts, to ensure maximum security - Ideal for use in shock & vibration prone environments. These ZaGO Seal Nuts feature a rubber seal to keep equipment safe, under every circumstance - Eliminating the need of frequent repair. KEY FEATURES • Low Crown Acorn Nuts • Fully Sealed • Military Standard ZaGO Low Crown Acorn Nuts offer a range of Sealing Nuts with a choice of "O" ring seals.