TANK AND METHOD OF MANUFACTURING A TANK

A tank includes a tank body made of a thermoplastic resin, a female screw member and a joint that are made of metal, and a seal member. The tank body has a tubular connection port with a through hole, and an inner space communicating with the connection port. The joint has a male screw portion to be screwed into a female screw hole of the female screw member, a boss portion connected to the male screw portion, and a joint through hole passing through the male screw portion and the boss portion. The seal member is provided so as to contact the boss portion and the hole side surface when the male screw portion is screwed into the female screw hole. The boss portion is contactable with a first bearing surface of the female screw member.