Fittings for sealing a wire within a tube and related methods

A fitting assembly, comprising:

• a body defining a bore and a ring cavity, the ring cavity including a ring shape;
• a nut at least partially received within and connected to the body, the nut defining a cavity and comprising a ring extension protruding from an end thereof, the ring extension received within the ring cavity;
• an insert, at least a portion of the insert within the cavity of the nut;
• and
• a tube, an end portion of the tube within the nut,
• wherein the nut and the body form a fluid-tight seal within the tube and the ring extension received within the ring cavity form another fluid-tight seal.

A method of assembling a fitting assembly, the method comprising:

• positioning a first portion of a tube within a body of the fitting assembly;
• positioning an insert within a cavity radially inside of a nut;
• positioning a second portion of the tube within a nut of the fitting assembly;
• and
• positioning the nut radially inside of the body to inhibit ingress of fluid outside the tube into the tube and into contact with a wire within the fitting assembly, wherein positioning the nut radially inside of the body includes positioning a ring extension of the nut into a ring cavity of the body to create a seal, the ring cavity including a ring shape.