What's the difference between fittings and adapters? - Hose Assembly Tips
Brass Pipe Fitting 1/4 Inch Female Pipe 1/2 Inch Male Reducer Adapter Air Hose Adapter Metal Pipe Adapter 2 Pack - Amazon.com
Adaptér vnútorný/vonkajší závit - Schwer Fittings
1/2" Male NPT Adapter -to- CGA Cylinder Fittings
Brass Pipe Fittings, Water Hose Adapter, G 1/2 Female to G 3/8 Male Reducer Adapter, Compression Fitting for Kitchen Bathroom Faucet, Pipe Connector with Rubber Washer,(2 Pack) : Amazon.sg: DIY & Tools