| 摘要 |
PROBLEM TO BE SOLVED: To provide a bag-shaped nut that can prevent a plating liquid from being pooled after plating, while improving fluidity of the plating liquid.SOLUTION: A bag-shaped nut 21 is configured by including a metallic nut body 22, and a resin-made resin part 23 insert-molded and integrated with the nut body 22. A plating liquid escape hole 34 is disposed in an intermediate position between a large diameter part 32 and a nut square part 33. The plating liquid escape hole 34 is penetrated and formed at a body side part 26 to come into communication with a nut hole 27. The plating liquid escape hole 34 is formed with a predetermined hole diameter as a portion to release the plating applied to a screw thread part 29. The plating liquid escape hole 34 is disposed in the position where the liquid is hard to get therein as being formed in the body side part 26. The plating liquid escape hole 34 of such an arrangement is covered by the resin part 23 after the plating. The liquid pool via the plating liquid escape hole 34 is prevented. |
