Clip

A clip comprising:

• a tubular body part with an insertion hole;
• and
• elastic locking pieces, wherein the elastic locking pieces are located on the inner peripheral surface of the insertion hole and on predetermined opposite areas with respect to an axis of the insertion hole, between the elastic locking pieces, wherein each elastic locking piece extends from a first side to a second side, which is opposite to the first side, in an axial direction such that a leading end of the elastic locking piece approaches the axis, and wherein each elastic locking piece is elastically deformable so that the leading end separates from the axis, each of the opposite elastic locking pieces having at the leading end a locking claw that is adapted to engage a helical screw groove on the outer peripheral surface of a screw member;
• wherein each of the opposite areas includes an elastic locking group consisting of one or more elastic locking pieces,
• wherein each of the elastic locking pieces includes two or more composite locking claws, each of which has a straight claw portion in which a claw leading-edge extends straight in a direction orthogonal to the axis;
• and a curved claw portion continuing from the straight claw portion extending curvedly along a circumferential direction around the axis such that an extended leading edge thereof projects further toward the axis than a claw leading-edge of the straight claw portion;
• and each of the elastic locking pieces includes a combination of the locking claws in which two of the straight claw portions and two of the curved claw portions alternate in the axial direction such that each elastic locking piece includes a combination of the composite locking claws that are different to each other in terms of the respective portions of the straight claw portion and the curved portion in the circumferential direction.