| 摘要 |
<p>An object of the present invention is to maintain sealability. A bolt 10 includes a flange portion 14 which bulges radially outwardly near and adjacent to an other axial end of a head portion 12 and comes into contact with a second connector 60 at the time of proper connection to prevent any further tightening, a stepped recess 16 which is located closer to one axial end part than a screw portion 13, recessed radially inwardly and fractured when an excessive tightening torque is applied, a retaining groove 18 which is located between the stepped recess 16 and the screw portion 13 and recessed radially inwardly and into which a retaining ring 80 for preventing the detachment of the bolt from a first connector 40 by coming into contact with the first connector 40 before connection is to be fitted, and seal grooves 15 which are located between the stepped recess 16 and the flange portion 14 and recessed radially inwardly and into which seal members 30 to be held in close contact with the first connector 40 in a liquid-tight manner at the time of proper connection are to be fitted.</p> |
