McMaster 44705K252 Low-Pressure 356 Aluminum Pipe Union Connector, 3 NPT Female, Class 150, Hex Body 3V555 Max/Min with Reset Backlit Yes

Max/Min with Reset Backlit Yes Temperature Range F 14 Degrees to 140 Degrees F Primary Scale Time Temperature Range °F 14 Degrees to 140 Degrees F Temperature Range °C -10 Degrees to 60 Degrees C

7 to 13 mph/6 to 11 kn

Pressure 200 psig Min

so you will likely need to finish with a bottoming-chamfer tap

Tin-plated copper barrel and contact

McMaster 44705K252 Low-Pressure 356 Aluminum Pipe Union Connector, 3 NPT Female, Class 150, Hex Body 3V555 Max/Min with Reset Backlit YesIn addition to being lightweight, these aluminum fittings offer good corrosion resistance. Use them in low pressure flow applications. To prevent cracking, do not tighten more than a 1 4 turn past hand tight. Union Fitting Union fittings separate into three pieces so you can access your line without unthreading pipe connections. Pressure Rating Low Pressure Shape Straight Fitting Type Connector, Union Fitting Connection NPT Female Pipe Size 3"