Amazon.com: 4 Pcs 3/8'' OD Compression Union Brass Compression Tube Fitting 3/8'' OD Compression Tube Connector Use with Copper, Aluminum, Plastic Tubing, Watertight Seal Waterlines or Air Pneumatic : Industrial & Scientific
Metal pipe quick connect,Brass quick disconnect fittings,Pneumatic Tube Hose Air Compression Straight Coupler 1/8 1/4 3/8 1/2 - Walmart.com
KU Pneumatic Compression Tube Fittings Air Parts High Quality Sanmin
What are tube compression fittings, and how do they work?
LTWFITTING 1/8 in. O.D. Comp x 1/8 in. MIP Brass Compression Adapter Fitting (5-Pack) HF682205 - The Home Depot
68CA-2-1 - Pneumatic fittings (Parker Hannifin) - Southern Fluid Power
Milton HIGHFLOWPRO™ V-Style/European Interchange Pneumatic Coupler and Plug Fitting Kit 1/4-in NPT 6 PC in the Air Compressor Fittings department at Lowes.com
Compression Fittings | Parker
Compression Fittings - Pneumatic cylinders, valves, air treatment
Pneumatic tube fittings: Push-In vs Compression - RG Group