Abstract: An anti-vibration anti-loosening threaded fastener is revealed. The threaded fastener includes a bolt and a nut. The bolt consists of a head, a stud disposed on a bottom surface of the head, and a through hole mounted axially in the stud. The nut is composed of a threaded slotted portion provided with an opening facing upward and fastened to the stud by threaded connection, and a post protruding from central area of a bottom of the threaded slotted portion. The post and the through hole are disposed eccentrically to each other so that forces that pull the bolt and the nut together are generated when the bolt and the nut are threaded and fastened with each other and the post is mounted into the through hole. Thereby the bolt and the nut are fastened more tightly and the threaded fastener is vibration resistant and anti-loosening.

Abstract: An adhesive tape holder comprising a base cylinder constituted by two cylinders releasably connected together end by end. Each of the cylinders has an extension and the ends of the extensions are connected together by a knife seat with a saw-like knife mounted thereon. One of the extensions is constituted by two parts hinged together so that the cylinder associated therewith can be released and open to have a roll of adhesive tape disposed on the base cylinder. The saw-like knife is covered by a slidable safety lid to prevent the knife from hurting the user when not in use. Attached on one of the extensions is a tape tip retaining post which is rotatable in one direction so as to prevent the tape tip from losing contact with the post.