A long nut is useful for excessive vibration. To make connection, place the nut over the tubing, threaded end toward the tubing end to be flared. Flare tubing to create a 45 degree flare. The tube flare is clamped between nut and flare seat of body when screwed together.
When assembly is tightened with a wrench, a leak-proof metal-to-metal joint is created.
The Inverted Flare Fittings mainly used in fuel and oil lines, automative brake, LP and Natural Gas Connections.