1-1/2 Face Seal Tube NutThe 1 1 2 Face Seal Tube Nut is a high quality fitting designed for brazed tube connections, featuring a face seal design for secure, leak proof performance. This tube nut connects tubing to various fittings, ensuring a tight, reliable seal even in high pressure and high vibration environments. The face seal provides a flat surface that tightly mates with the connecting surface, reducing the chance of leaks over traditional flare connections