The AT series design includes optional sealing plugs, optional end caps that provide support for the rear seal in harsh chemical environments, dust and water resistant rear seals, optional reduced diameter seals to support smaller OD wire sizes, and ergonomically designed clips which allow for easier mating and un-mating. In addition, the series features recessed sealing areas to secure the front seal to help prevent roll, enhanced front seals, enhanced wedges with added seal retention features that keep it in place, and optional hyperbolic contacts that have longer contact life, lower contact resistance and high immunity to shock and vibration.