The NESCO Model 321 Insulated Grounding Bushing is a reliable solution for professional electricians and contractors who need to protect conductor insulation while maintaining a solid grounding connection at conduit terminations. Designed for ½" trade size threaded conduit, this bushing features a smooth thermoplastic liner that shields wire insulation from sharp metal edges — a critical detail on busy job sites where speed and code compliance go hand in hand. Whether you're roughing in a commercial panel, finishing a residential service entrance, or working through a conduit run in a tight enclosure, the Model 321 delivers consistent performance and meets the demands of daily trade use.

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