PVC Coated Knockout Hub
Hub are used to terminate conduit runs through the wall of a sheet metal electrical enclosure. They are available with or without grounding lug. STTB style hubs are “Through-Bulkhead” fittings used to pass conduit runs through firewalls or bulkheads up to 1/8″ thick. STTTB style hubs perform the same function for unlimited wall thicknesses, (furnished without nipples).
Description
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Physical Properties
• 40 mil gray PVC exterior coating. • 2 mil gray urethane interior coating. • ST and STTB available in 12 trade sizes from 1/2″ through 6″. • STTTB in 6 trade sizes from 1/2″ through 2″. • Sealing sleeves on conduit side of hub. • Molded PVC gasket seals flush with enclosure wall. • SO-ring gasket provides additional seal. |
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| Standards: • UL • CSA |
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| NOTE: • All Screw-tight Hubs are listed for NEMA type enclosures 2, 3, 3R, 4, 4x, 11 and 12 • Grounding and Bonding Hubs are listed for NEMA Enclosures 2, 3, 3R, 4 and 12 |
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