| 摘要 |
PROBLEM TO BE SOLVED: To provide a seal washer capable of preventing a sealing surface from being dropped from a bolt hole peripheral portion without increasing a diameter of the seal washer.SOLUTION: A seal washer 1 is interposed between a seat surface 20, 30 of a bolt 2 or a nut 3 and a flange part 40 of a water pipe 4 and used for sealing a bolt hole 40s formed in the flange part 40. The seal washer 1 includes an annular seal member 10, and a frame member 11 harder than the seal member 10. In the seal member 10, a sealing surface 10f for tight contact with a bolt hole edge portion 40f is set in an end portion that becomes a flange part side, and the seal member 10 is formed from an elastic member and includes an insertion hole 10s in which a bolt shank part 21 is inserted. At a circumferential edge portion of the insertion hole 10s in the seal member 10, a fin part 12 is provided which protrudes from the sealing surface 10f in an axial direction in a natural state where any external force does not act thereon, and can be inserted to a gap between the bolt hole 40s and the bolt shank part 21. |
