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The HALEX/SCOTT FETZER 91631 is a 1/2 inch watertight zinc conduit hub designed to create a secure, sealed connection between rigid or IMC conduit and a load center or other metal enclosure. Engineered for use at knockouts or slip-fit holes, this hub features a flame-retardant Lexan insulated throat that protects conductors from abrasion at the entry point. The oversize locknut delivers vibration-proof installation and ensures positive grounding. Rated for rain, oil, and dust resistance, this hub is equally suited for indoor and outdoor electrical installations. Electricians reach for this fitting on commercial and residential panel work where a watertight joint is code-required.
The 91631 is used wherever rigid or IMC conduit must terminate into a load center, panelboard, or metal enclosure and a watertight seal is required. Common applications include outdoor sub-panels, equipment enclosures exposed to weather or washdown, and industrial installations where oil or dust ingress must be prevented. The insulated throat protects wire insulation from the metal edge of the fitting during pull-through. This SKU ships as a package of 10 hubs, making it practical for multi-circuit panel installations or job-lot stocking.
Designed for use with 1/2 inch rigid metal conduit (RMC) and intermediate metal conduit (IMC), connecting to load centers or metal enclosures at standard knockout or slip-fit hole openings.
Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize the panel or enclosure completely before beginning conduit termination work. Thread the hub into the knockout opening and secure the locknut firmly against the interior enclosure wall to maintain watertight integrity and grounding continuity. Do not overtighten to the point of distorting the enclosure wall or cracking the Lexan throat insert.
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