LTWFITTING 5/16 in. O.D. Comp x 1/4 in. MIP Brass Compression Adapter Fitting (5-Pack) HF685405 - The Home Depot
SS Pipe Adapter 1/2 3/4" 1" BSP Male 18mm 20mm 22mm 25mm OD Tube Ferrule Air Compression Fitting Connector Stainless Steel 304 - AliExpress
Sanitary Fitting - 304 Stainless Steel Polished - Butt Weld - Pipe Adapter - 1/2" Tube OD x 1/
Compression Tube Adapter, High Strength Compression Tube Pipe Fitting Connector Practical for Water Pipe for Air Pipe for Oil Pipe(Ф10-Ф14) - Amazon.com
Stainless Steel Male Adapter Tube To Pipe, Size: 1/2 inch
1.25" Standard Tube Adapter Right Hand 1.5(ID) 12(TPI)
Watts PEX Quick Connect Pipe Adapter, 1/4 OD Tube x 1/8 In. MPT | Ramsey Hardware