TUBE END PROTECTING DEVICE

摘要

PROBLEM TO BE SOLVED: To easily and reliably remove a tube end protecting device reliably from an end of a tube to be protected under any use conditions. SOLUTION: The tube end protecting device A includes a resin inner cylinder 11 mounted on a male screw of a tube end 13 for protecting the male screw and a metallic outer cylinder 10 to be mounted on an outer peripheral face of the inner cylinder 11 in tight contact, wherein a part of a peripheral wall of the metallic outer cylinder 10 is pushed into a peripheral wall of the resin inner cylinder 11 thereby forming anti-rotation protrusions 27.