3 ½" Plastic Insulating Bushing, Model BUS-35

The NESCO BUS-35 Plastic Insulating Bushing is a job-site essential for professional electricians and contractors working with 3½" conduit systems. Designed to protect conductor insulation from sharp metal edges at conduit terminations, this bushing helps prevent nicks, cuts, and long-term insulation breakdown — keeping your installations code-compliant and your conductors protected. Its durable plastic construction resists corrosion and stands up to the demands of commercial and industrial environments, making it a reliable choice for panel knockouts, junction boxes, and conduit runs where conductor protection is non-negotiable.

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