Cut Sheet

Knockout Hubs Specifications

COMPLIANCES FEATURES APPLICATION

PLASTI-BOND REDH

OT KNOCKOUT HUBS

KNOCKOUT HUBS

1100 US Highway 271 South • Gilmer, TX 75644 Phone: 903/843-5591 • www.plastibond.com

PLASTI-BOND REDH

OT 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 “Through-Bulkhead”

fittings used to pass conduit runs through firewalls or bulk-

heads up to 1/8" thick. STTTB style hubs perform the

same function for unlimited wall thicknesses, (furnished

without nipples).

• 40 mil gray PVC exterior coating

• 2 mil red 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

• 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

Knockout Hubs Configurations

PRST2 PRSTG2

ST STG2

STTB STTTB

APPROVAL STAMP

(See online product submittal guide at www.plastibond.com)

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PLASTI-BOND REDH2OT KNOCKOUT HUBS Print This Page KNOCKOUT HUBS Return To Index PRST2 PRSTG2 Knockout Hubs Specifications ST APPLICATION Knockout Hubs Configurations STG2 c STTB a STTTB d a COMPLIANCES a FEATURES b PLASTI-BOND REDH2OT 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.
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Print This Page KNOCKOUT HUBS Return To Index Knockout Hubs Technical Data ST STG Pipe Size 1/2" 3/4" 1" 1-1/4" 1-1/2" 2" 2-1/2" 3" 3-1/2" 4" 5" 6" Catalog # Nominal Weight A B C PRST1 PRST2 PRST3 PRST4 PRST5 PRST6 PRST7 PRST8 PRST9 PRST10 PRST11 PRST12 0.2 0.3 0.4 0.4 0.6 1.2 1.5 2.1 3.0 3.5 5.4 6.9 1.84 2.22 2.66 2.94 3.19 3.75 4.22 4.31 4.38 4.44 4.94 5.00 2.00 2.25 2.50 3.25 3.50 4.25 4.75 5.25 5.50 6.25 7.50 8.50 1.31 1.66 2.03 2.28 2.53 3.09 3.28 3.38 3.44 3.50 4.00 4.