Abstract: A fatigue-resistant terminal for tubing used in passive structures by which the tubing member of the structure may be bolted or otherwise fastened in face-to-face contact with another member of the structure. The connector terminal contact face on one side of the connector is formed in a plane containing the adjacent-side tangency plane of the tubing and is formed on its opposite side by a trough-like depression that progressively deepens and widens endwise of the connector and that bottoms in a flattened area adjoined on opposite sides by upright shoulders or flanges attendantly formed from the cross-sectionally remaining tubing material along the depression and flattened area.

Abstract: A duct seal including a supporting assembly adapted to support a duct extending through an opening in a partition and a mounting assembly mountable by the partition for guiding and retaining the supporting assembly. The seal maintains a seal against overpressure while permitting the duct to shift bi-directionally lengthwise and about its axis rotatively and orbitally. The seal is particularly useful as an aircraft firewall duct seal.