XS Scuba AC905 Stainless Steel Hose Adapter (9/16"-18 Male to 1/4" NPT Male)

The XS Scuba AC905 is a rugged stainless-steel low-pressure (LP) adapter designed to convert a standard scuba LP hose connection to a 1/4" NPT fitting. If you need to interface common regulator hoses with gear that uses 1/4" NPT ports—like certain switch blocks, surface-supplied/umbilical components, communication gear, or shop/garage pneumatic setups—this adapter makes the connection clean, secure, and corrosion-resistant.

Built from stainless steel for long service life in wet, salty environments, the AC905 uses a Viton O-ring where applicable to help maintain a dependable seal.

Important: This is an LP-only adapter with a working pressure up to 200 psi (13.8 bar)—it is not intended for high-pressure regulator ports or high-pressure applications.

Key features

Thread conversion: 9/16"-18 male to 1/4" male NPT (commonly used to adapt the second-stage end of an LP hose to 1/4" NPT ports)

Stainless steel construction for durability and corrosion resistance

Viton O-ring (where applicable) for a reliable seal

LP use only: rated up to 200 psi