Male connector

A male connector removably attached to an upstream end of a tube used in enteral feeding, the male connector comprising:

• a connector body and a lock nut,
• the connector body including
• a tubular male luer that is provided at a first end of the connector body,
• a first female threading that surrounds the male luer,
• a base end portion that is provided at a second end of the connector body,
• a tubular portion that is located between the male luer and the base end portion,
• a spiral protrusion that protrudes outward along a radial direction from an outer circumferential face of the tubular portion, and
• a channel that extends along a central axis of the connector body and passes through the connector body from the male luer to the base end portion, and
• the lock nut having a hollow tubular shape and being open at two ends, and including a second female threading that is screwed together with the spiral protrusion,
• wherein when the base end portion is inserted into the tube, and the spiral protrusion and the second female threading are screwed together, the tube is arranged in the radial direction between the base end portion and the lock nut, and the base end portion and the lock nut clamp the tube so that the base end portion and the lock nut compress the tube in the radial direction,
• first rotation prevention mechanisms that engage directly with one another are provided on the connector body and the lock nut such that the lock nut does not rotate relative to the connector body when the tube is clamped,
• the male connector can be connected to a female connector that includes an insertion portion for insertion of the male luer and male threading that is to be screwed together with the first female threading, and
• the first rotation prevention mechanisms are configured such that when the lock nut and the female connector are rotated in mutually opposite directions in order to separate the male connector and the female connector that are connected to each other, screwing together of the first female threading and the male threading is loosened, without the lock nut rotating relative to the connector body.