Blu-Sub Flanges, End-Caps & Couplings provide the critical sealing and connection interfaces for underwater enclosures. Options include aluminum, acrylic, polymer, optical dome, glass, and coupling designs, each engineered for reliable watertight performance. Paired with acrylic or aluminum tubes, they enable modular subsea builds that balance visibility, strength, serviceability, and depth rating. Whether for cameras, sensors, control systems, or multi-section enclosure assemblies, our flange, end-cap, and coupling solutions deliver proven durability and sealing integrity.