Parker 68P-8-4 Compression Fitting for Thermoplastic and Soft Metal Tubing, Poly-Tite, Tube to Pipe, Brass, Compression and Male Pipe Connector, 1/2" and 1/4": Amazon.com: Industrial & Scientific
LTWFITTING Brass Fitting Connector 1/2-Inch Hose Barb x 3/4-Inch NPT Male Fuel Gas Water(Pack of 5): Pipe Fittings: Amazon.com: Industrial & Scientific
uxcell Brass Pipe fitting, 3/8 SAE Flare Male to 1/4NPT Female Thread, Tubing Adapter Hose Connector, for Air Conditioner Refrigeration - - Amazon .com
Plumbing Stabilisation Brass Tap Extension, 1 Inch x 25 mm DN25 Thread Extension Tube Extension Fitting : Amazon.de: DIY & Tools
Amazon.com: WYNNsky Tank Mini Ball Valve, 1/4''NPT Female Threads×1/4''NPT Male Threads, Shut-Off Air Compressor Accessories Fittings : Industrial & Scientific
Brass Pipe Fitting, Class 150, Threaded Flange, 3/4" NPT Female: Industrial Pipe Fittings: Amazon.com: Tools & Home Improvement