An apparatus for retaining a plug in a fluid end used in hydrocarbon recovery having a lock collar configured in a cylinder shape, a screw, a center hexagon configured to be inserted into the lock collar, the center hexagon configured with a port that extends along a longitudinal axis of the center hexagon, the center hexagon further configured with six sides, each of the six sides interfacing with the port, and the center hexagon further configured with a bottom face and a segmental wedge.