Bridgeport® Conduit Bushing, 3-1/2 in Trade, 105 deg C, Plastic, Gray, Plain, 3-3/8 in ID x 4-5/16 in OD x 3/4 in W
Plastic bushing is used with locknut to terminate threaded rigid and IMC to box. Bushing can also be used with connector to prevent damage to wire insulation.