The NESCO Model 1661 is a ½-inch polyethylene EMT bushing with an insulated throat designed to protect wire insulation from abrasion at conduit terminations. A must-have fitting for any rough-in job, it threads onto the end of EMT conduit to provide a smooth, rounded edge that prevents damage to conductors during pull-through. Key Features Material Polyethylene for flexible, insulated wire protection Throat Type Insulated throat protects conductor insulation during wire pulls Application Indoor use; ideal for panel terminations, junction boxes, and enclosure knockouts Easy Install Threads directly onto ½" EMT conduit — no tools required Specifications Trade Size ½" Material Polyethylene Conduit Type EMT Throat Type Insulated Inside Diameter 0.522" Outside Diameter 0.57" Application Indoor Model 1661 UPC 75133818451