an anchor for engagement with a post - tension tendon includes an anchor base having a generally tapered wedge receiving bore . a sheath surrounds the anchor base . the sheath has a substantially cylindrical extension on one side of the anchor base for contacting the tendon at a distal end thereof from the anchor base . the extension is formed integrally with the sheath and has a seal disposed therein proximate the distal end . a cap having external threads thereon is for engaging corresponding internal mating threads on the sheath on a side of the anchor base opposite to the sheath extension . the cap has a tool engagement surface thereon to facilitate rotation by a tool for engagement with the sheath .