A method of making a bulkhead fitting assembly may include joining a tube to a thermal shell of a mounting flange, the mounting flange shaped to be attached to a bulkhead and including an adapter; forming the thermal shell to have a portion spaced away from the tube to form an air pocket between the tube and the thermal shell adjacent the mounting flange; and placing a bushing on the adapter such that the bushing completes a current path from the tube to the adapter, from the adapter to the bushing, and from the bushing to the bulkhead.

A connection arrangement between an aluminum tube and a heat exchanger, wherein the tube has an outer diameter D and comprises an end flange abutted against a connection flange of the heat exchanger and fastened thereto by means of a fastener. The tube further comprises an elbow arranged close to the end flange, and a rectilinear segment extending from the end flange to an end cross-section of the elbow. The elbow has a bend radius R, referred to the central axis of the tube, such that 0.5DRD and the end cross-section of the elbow is arranged at a distance d from the connection flange of the heat exchanger such that d0.5D. The fastener consists of a tube clamp of plastic material encircling the connection flange of the heat exchanger and the end flange of the tube. The tube clamp comprises a pair of clamp halves snap-fitted to each other.

A flare-type brake line assembly includes (a) a brake tube having a flare with a first sealing surface, (b) a brake component having a port with a second sealing surface and (c) a tube nut to secure the brake tube and brake component together. At least one of the two sealing surfaces is treated to increase the coefficient of friction between those surfaces. A related method is also disclosed.

A retainer includes an annular gasket retaining portion for retaining a gasket therein and an annular coupling member retaining portion which has an inner diameter greater than that of the gasket retaining portion and retains one coupling member. At an inner circumference of the gasket retaining portion and an inner circumference of the coupling member retaining portion are formed annular grooves, respectively, for holding therein elastic rings, respectively.

An axial force measurement device includes a frame, a tightening actuation unit that performs tightening operation upon a screw type tube fitting installed upon a tube upon which is formed an annular portion projecting in the radially outward direction from the tube, a testing member, and a mating member holding unit that holds the testing member into which the tube fitting is screwed and that is coupled to the tube. The tightening actuation unit and the mating member holding unit are provided to the frame in line along the direction of a reference axis that extends in the direction of the center line of the tube fitting and the tube axis of the tube. The testing member has a first part that engages with the tube fitting, and a second part against which the annular portion of the tube is pressed.