The original seal design developed to improve the performance of the O-Ring and Back-up ring used in the MIL-G-5514F grooves. The Turcon® Double Delta® II is a double-acting sealing element which is energized by an elastomer O-Ring. The design demonstrates good friction properties, stick-slip free starting and excellent dry running. A full range of sizes are offered to suit all MIL-G-5514F and AS4716 grooves. Custom designs available on request.