SDCJ Prism Adapter (5/8-11 to 1/4-20) — Replacement

Replacement 5/8-11 to 1/4-20 prism adapter for the Anchor Bolt Locating Jig (Shields Dead Center Jig, SDCJ). This adapter steps the jig's 5/8-11 thread down to the 1/4-20 mount used by many mini prisms, so you can set a mini prism right at the dead center point and shoot the jig with gear you already own. Order it if your adapter is stripped or lost, or you are matching the jig to a different prism. Machined concentric so the prism sits true over the point.