[25]:eighty two The flare nut, which had Earlier been installed around the tubing, is then tightened above the fitting to force the tapered surfaces tightly together. Flare connectors are typically made of brass or plastic, but chrome steel or other components may very well be employed. Some fittings on these http://trentongviwj.topbloghub.com/225506/5-essential-elements-for-valves-and-fittings