THREADED FASTENER HAVING INSERTION DEPTH INDICATOR

摘要

Disclosed are threaded fasteners having insertion depth indicators (14) positioned periodically along the thread (12). Also disclosed are devices (100) having internal thread adapted to engage with and secure to an externally threaded bar wherein the device has an aperture or apertures (124) extending from an outside surface to the internal thread to allow the ingress of concrete laitance or other flowable material thereto.