The NESCO Model 1661 is a ½" polyethylene insulating bushing designed for EMT conduit terminations — a small fitting that makes a big difference on the job site. Whether you're landing circuits in a residential panel, terminating runs at a junction box, or pulling wire through enclosure knockouts, this bushing's smooth insulated throat protects conductor insulation from abrasion and sharp conduit edges. Lightweight, tool-free to install, and built for high-volume rough-in work, it's a reliable staple for professional electricians and contractors who can't afford callbacks from damaged wire insulation.

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