PROBLEM TO BE SOLVED: To provide a loose-fit type flange capable of reducing a workload by saving the total weight of a joint including a bolt, a nut and a plain washer.;SOLUTION: The number of bolt holes 1 is set small by setting a thickness dimension larger in comparison with that of a loose-fit type flange based on JIS B2220, and weight saving is achieved by gradually reducing a width dimension W toward the center of a side H from an apex E.;COPYRIGHT: (C)2014,JPO&INPIT
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