Abstract: A stretched cable tie has a head connected to a strap having teeth on both sides of the strap. A moveable pawl is positioned on a ledge inside the head and urges the strap into engagement with a fixed tooth within the head so that teeth on both sides of the strap are engaged by the pawl and fixed tooth respectively. A sharp corner is provided more than a multiple of the spacing between the strap teeth below the fixed tooth so as to allow the corner to penetrate the strap and engage the adjacent tooth to aid in providing a withdrawal force. A portion of the wall of the head behind the fixed tooth is removed to facilitate cooling and eliminate shrinkage in the area of the fixed tooth.

Abstract: A one-piece fastener for securing a plurality of elongate objects in a bundle and securing the bundle to an apertured mounting surface includes an elongate flexible strap having a plurality of teeth, the strap being joined to a locking head by a spiral strap portion. The head includes a strap accepting slot, a downwardly disposed pawl that presents a plurality of teeth disposed to engage the strap teeth, a barb means formed on the pawl for resiliently engaging the edge of a mounting aperture and a pressure pawl formed opposite the pawl, the strap being positioned between the pressure pawl and pawl when secured with the locking head.