The Bridgeport 329 3-1/2-Inch Plastic Bushing terminates and protects conductors inside threaded rigid and IMC conduits when entering a box using a simple locknut. The rounded surface of the bushing prevents damage to wire insulation and is temperature rated to 105 degrees Celsius. With an overall length of 3/4 inches and diameters of 3-3/8 inches and 4-5/16 inches, the plastic construction is maintenance-free, cost-effective and resistant to corrosion and chemicals providing a long-lasting fit. Solidly built to meet the construction and general industry OSHA-recognized, NRTL-listed electrical standards, NEMA Specification Standard FB-1, the stringent bonding and grounding requirements of 514B cULus and to be RoHS compliant. Bridgeport builds every product with the same goal in mind: guaranteeing a fast, professional-grade, trouble-free installation. Our wide selection of products are manufactured for innovation, consistency and quality - providing you with connectors, couplings or transition fittings that are safety listed, ensuring code compliance to meet your needs and enable you to do your best work at a lower total cost. When you need a solution you can depend on, be sure to look for Bridgeport Orange.