Fastner

A fastener configured to fix a pair of opposing flaps of a box in a closed state, comprising:

• a receiving part extending along a first direction, with a flap abutting part configured to abut surfaces of the flaps of the box being arranged on at least one side of the receiving part in a second direction orthogonal to the first direction, the flap abutting part constituting a tab part for which at least a portion is curvable or bendable upward;
• a linking part having a rod shape and extending from a center portion of the receiving part with respect to the first direction in a direction orthogonal to the first direction and to the second direction;
• and
• a pressing part having a rod shape when viewed along a direction parallel to a center axis of the linking part, the pressing part extending outwardly from an end of the linking part along the first direction, the pressing part being configured to be inserted into a gap at a juncture of the flaps of the box in the closed state and rotated about the center axis of the linking part so that spaces on both sides of the linking part between the receiving part and the pressing part constitute insertion areas into which the flaps of the box are inserted.