TUBE CONNECTION STRUCTURE

摘要

A tube connection structure (1) has a joint body (2), and a coupling member (3) having a fastening part (133) threaded with the joint body (2) and a tool-engaging part (134) gripped by a fastening tool, the tube connection structure being configured such that the tool-engaging part (134) is separated from the fastening part (133) after the coupling member (3) is mounted to the joint body (2). The joint body (2) and the coupling member (3) have a threading contact part (140), the components of which are in contact with each other so that the threading of the coupling member (3) over the joint body (2) is limited before the tool-engaging part (134) is separated from the fastening part (133).