The NESCO 4" Plastic Insulating Bushing (Model BUS-40) is built for professional electricians and contractors who need reliable conductor protection on large-diameter conduit runs. Its smooth, non-metallic interior guards wire insulation against abrasion at conduit terminations, reducing the risk of shorts and ground faults in commercial and industrial installations. Lightweight and easy to seat by hand, this PVC bushing speeds up rough-in work and keeps your crew moving on busy job sites — no tools required for installation.

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