Abstract: A slotted insert based upon a non-metallic void former including a neck portion defining a longitudinally elongated slot, the neck portion having a first transverse width, and a channel portion defining a longitudinally elongated channel, the channel having a second transverse width substantially greater than the first transverse width. The insert includes a metal nut, captured within the channel, having an aperture and a third transverse width substantially greater than the first transverse width. The longitudinally elongated slot and longitudinally elongated channel are interconnected with the aperture of the captured metal nut accessible through the slot to provide an adjustable anchoring or connection point to other structural components. Various attachment features allow the insert to be positioned within formworks with or without direct attachment to the forming surface of a concrete form member.