Abstract: An insert is described for attachment to a concrete railroad tie mold within an opening formed therein. The insert is adapted to releasably receive and position a railroad rail fastener with a head end positioned below the mold and an anchor part projecting into the mold. The insert includes an insert body including an outward peripheral edge surface shaped to fit within the formed first opening in the railroad tie mold, and an internal peripheral edge surface defining a fastener receiving opening, situated inwardly of the outward peripheral edge surface. The insert body further includes a top surface that is held in substantial coplanar relation to an adjacent mold bottom surface. A clip arrangement provided on the insert body functions to releasably secure the insert body to the mold with the top surface of the insert body being substantially coplanar with the bottom mold wall. An adapter may be provided on the mold to facilitate mounting and positioning of the insert on the mold.