| 摘要 |
The present invention is directed to a down-sizable fitting for transferring a high-temperature, high-pressurized special chemical fluid which should be under strict control used in a high technology field or industry. A fitting according to the invention comprises a fastener (9) engaging a two-plied section including a folded-back portion (1c) which is formed such that one end section of a tube (1) is folded or turned back outwardly, and a fitting body (4) for fitting into the fastener (9, 11);the fastener (9, 11) having an engaging portion (9c) for receiving said two-plied section of the tube (1), a contact portion (9b) for contact with the outer surface of the folded-back portion (1c) of the tube (1), and a threaded portion (9d) formed on the inner surface thereof;the engaging portion (9c), the contact portion (9b) and the threaded portion (9d) are axially aligned;the fitting body (4) including a cylindrical section (4a) which has an end for abutting against the U-shaped end (1c) of the two-plied section of the tube (1), the cylindrical section (4a) provided at the outer surface thereof with a threaded portion (4b).
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