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Description: PERMA-COTE ST style knockout hubs 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 ÒThrough-BulkheadÓ 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).
Features:
40 mil gray PVC exterior coating
2 mil green 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.
O-ring gasket provides additional seal
Standards:
UL
CSA
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
