Robroy's PRST3 knockout hubs are used to terminate conduit runs through the wall of sheet metal electrical enclosures. These hubs are available with or without a grounding lug, providing versatile options for electrical installations.
STTB style hubs are "Through-Bulkhead" fittings suitable for passing conduit through firewalls or bulkheads up to 1/8" thick. STTTB style hubs serve the same purpose for walls of unlimited thickness, furnished without nipples.
ROBROY PVC Coated Knockout Hub PRST3 is listed to help buyers compare fit, application, and installation context before ordering.
Match the product to the required rating, connection type, and intended installation environment.
For US-based technical sourcing, this product belongs to PVC Conduit and should be selected by application fit.
For replacement work, compare the existing part number, electrical requirements, mounting conditions, and installation environment. Use ROBROY PVC Coated Knockout Hub PRST3 as a starting point, then confirm the final choice against the exact project specification.
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