Overview The Omniswivel Locking Quick Disconnect Adapter Set allows you to quickly connect and disconnect compatible scuba regulator components while providing an added locking mechanism for enhanced security. Built from durable solid brass and manufactured using oxygen-compatible materials, this adapter set is ideal for technical diving, stage bottle configurations, specialty regulator setups, and applications requiring reliable quick-disconnect functionality. Best For Technical and recreational scuba diving Quick disconnect regulator hose configurations Stage, decompression, and specialty regulator setups Divers wanting a secure locking quick-disconnect connection Not Ideal For Regulators with non-standard thread sizes Applications requiring permanent hose connections Key Features Locking Quick Disconnect: Female quick disconnect features an integrated locking sleeve that rotates 90° counter-clockwise after connection to help prevent accidental release. Standard Regulator Compatibility: Female connector features a 9/16"-18 male fitting for standard regulator hoses. Universal Male Connector: Male quick disconnect connects to standard 9/16"-18 second stage regulator fittings. QS-YM-S Compatible: Male fitting also connects to standard 9/16"-18 female ports. Solid Brass Construction: Built for long-lasting durability and corrosion resistance. Oxygen Compatible Materials: Manufactured using O₂-compatible materials for appropriate applications. Specifications Brand: Omniswivel Product Type: Locking Quick Disconnect Adapter Set Female Connection: 9/16"-18 male fitting Male Connection: Standard 9/16"-18 second stage regulator fitting Construction: Solid brass Compatibility: Standard 9/16"-18 regulator connections Materials: O₂ compatible Compatibility The female quick disconnect connects directly to a standard regulator hose with a 9/16"-18 connection. The male quick disconnect attaches to standard 9/16"-18 second stage regulator fittings and QS-YM-S compatible 9/16"-18 female ports. Use Cases Technical diving regulator systems Stage and decompression bottle configurations Specialty regulator accessories Equipment requiring quick connection and removal Expert Insight Unlike standard quick disconnect fittings, the integrated locking sleeve helps prevent accidental disconnection during use. Combined with durable brass construction and standard regulator thread compatibility, this adapter set provides a dependable solution for divers who frequently configure or swap regulator equipment. What's Included One Omniswivel Locking Female Quick Disconnect Adapter One Omniswivel Locking Male Quick Disconnect Adapter Not Included Regulator hose Second stage regulator FAQs How does the locking mechanism work? After connecting the quick disconnect, rotate the female sleeve 90° counter-clockwise to engage the lock and help prevent accidental disconnection. Will this fit standard scuba regulators? Yes. It is designed for standard 9/16"-18 regulator hose and second stage connections. What material is the adapter made from? The adapters are precision machined from solid brass for durability and corrosion resistance. Is it oxygen compatible? Yes. The adapter is manufactured using O₂-compatible materials. Care & Return Policy Rinse thoroughly with fresh water after diving and allow the fittings to dry completely before storage. Periodically inspect the locking sleeve and O-rings for wear, corrosion, or damage before use. For full details on returns and eligibility, please review our Return Policy .