Brass Compression Nut For Plastic, Copper, & Aluminum Tubing, 0.19 Inch Tube OD

Copper, aluminum, and plastic tubing are all compatible with this nut. The one thing to keep in mind with plastic is that the temperature limits of whatever plastic you're running take priority over the nut's own rated range, so make sure your tubing material can handle the conditions in your system. For metal tubing like copper, you're covered from -65F up to 250F. Steel tubing is not compatible, so steer clear of that combination.

This spare part nut from the Eaton Aeroquip 61x series is designed for use with aluminum, copper, and plastic tubing. Just be sure to check the temperature limits of the plastic if you go that route.