Amazon.com : IST Hose Adaptor 9/16" male to 3/8" : Garden Hose Parts : Sports & Outdoors
Solid Brass Pipe Fitting Adapter, Female 1/2" to Male 9/16" Copper Bathroom Faucet Water Supply Line Coupling with Seal O Rings|Pipe Fittings| - AliExpress
FAV 9/16″ HP X 3/8″ Type M Adapter | Autoclave Fittings Adapters
Sonar LP 9/16-in Male x 3/8-in Female Regulator Hose Connector - The Scuba Doctor Dive Shop
Hose adapter 9/16" male thread to 3/8" female thread, 10,24 €
OmniSwivel Adapter: 3/8-inch M = 9/16-inch F | Dive Gear Express®