Plasti-Bond, a RobRoy Company knockout Hubs Catalog Page
Knockout Hubs
General Service Fittings
Knockout Hubs
Description:
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. STTB style hubs are
“Through-Bulkhead” ttings used to pass conduit runs through rewalls 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
■ ST available in 12 trade sizes from 1/2"
through 6"
■ STTB available in 10 trade sizes from 1/2"
through 4"
■ STTTB available in 6 trade sizes from 1/2"
through 2"
■ Sealing sleeves on conduit side of hub
■ Molded PVC gasket seals ush with enclosure
wall
■ O-ring gasket provides additional seal
Standards:
Steel Only: ST, STG
■ UL 514B (E200413)
■ NEC/CEC:
Class I, Division 2
Class II, Division 1 & 2
Class III, Division 1 & 2
NOTE:
■ All Screw-tight Hubs are listed for NEMA and UL 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
36
1100 US Highway 271 South
Gilmer, Texas 75644
Phone: 903.843.5591
Fax: 903.843.5595
Knockout Hubs
Knockout Hubs Technical Data
ST
PIPE NOMINAL MAX ALUMINUM
SIZE CATALOG # WEIGHT A B C WALL THICK CATALOG #
1/2" PRST1 0.2 1.34 2.00 0.81 0.19 PRSTA1
3/4" PRST2 0.3 1.47 2.25 0.91 0.19 PRSTA2
1" PRST3 0.4 1.66 2.50 1.03 0.25 PRSTA3
1-1/4" PRST4 0.4 1.69 3.25 1.03 0.25 PRSTA4
1-1/2" PRST5 0.6 1.69 3.50 1.03 0.25 PRSTA5
2" PRST6 1.2 1.75 4.25 1.09 0.25 PRSTA6
2-1/2" PRST7 1.5 2.22 4.75 1.28 0.25 PRSTA7
3" PRST8 2.1 2.31 5.25 1.38 0.25 PRSTA8
3-1/2" PRST9 3.0 2.3
4" PRST10 3.5 2.44 6.25 1.50 0.25 PRSTA10
5" PRST11 5.4 2.94 7.50 2.00 0.25 PRSTA11
6" PRST12 6.9 3.00 8.50 2.00 0.31 PRSTA12
8
5.50 1.44 0.25 PRSTA9
KNOCKOUT HUB CONFIGURATIONS
ST STG
STG
PIPE NOMINAL MAX ALUMINUM
SIZE CATALOG # WEIGHT A B C WALL THICK CATALOG #
1/2" PRSTG1 0.2 1.34 2.00 0.81 0.19 PRSTAG1
3/4" PRSTG2 0.3 1.47 2.25 0.91 0.19 PRSTAG2
1" PRSTG3 0.4 1.66 2.50 1.03 0.25 PRSTAG3
1-1/4" PRSTG4 0.4 1.69 3.25 1.03 0.25 PRSTAG4
1-1/2" PRSTG5 0.6 1.69 3.50 1.03 0.25 PRSTAG5
2" PRSTG6 1.2 1.75 4.25 1.09 0.25 PRSTAG6
2-1/2" PRSTG7 1.5 2.22 4.75 1.28 0.25 PRSTAG7
3" PRSTG8 2.1 2.31 5.25 1.38 0.25 PRSTAG8
3-1/
2"
PRSTG9 3.0 2.38 5.50 1.44 0.25 PRSTAG9
4" PRSTG10 3.5 2.44 6.25 1.50 0.25 PRSTAG10
5" PRSTG11 5.4 2.94 7.50 2.00 0.25 PRSTAG11
6" PRSTG12 6.9 3.00 8.50 2.00 0.31 PRSTAG12
STTB
PIPE NOMINAL MAX ALUMINUM
SIZE CATALOG # WEIGHT A B WALL THICK CATALOG #
1/2" PRSTTB1 0.5 1.34 2.00 0.19 PRSTTBA1
3/4" PRSTTB2 0.5 1.47 2.25 0.19 PRSTTBA2
1" PRSTTB3 0.7 1.66 2.50 0.25 PRSTTBA3
1-1/4" PRSTTB4 1.0 1.69 3.25 0.25 PRSTTBA4
1-1/2" PRSTTB5 1.2 1.69 3.50 0.25 PRSTTBA5
2" PRSTTB6 1.7 1.75 4.25 0.25 PRSTTBA6
2-1/2" PRSTTB7 2.5 2.22 4.75 0.25 PRSTTBA7
3" PRSTTB8 3.0 2.31 5.25 0.25 PRSTTBA8
3-1/2" PRSTTB9 4.2 2.38 5.50
4" PRSTTB10 5.9 2.44 6.25 0.25 PRSTTBA10
0.25
PRSTTBA9
General Service Fittings
STTB STTTB
Contact us:
customerservice@plastibond.com
STTTB
PIPE NOMINAL MAX ALUMINUM
SIZE CATALOG # WEIGHT A B WALL THICK CATALOG #
1/2" PRSTTTB1 1.0 1.34 2.00 * PRSTTTBA1
3/4" PRSTTTB2 1.0 1.47 2.25 * PRSTTTBA2
1" PRSTTTB3 1.4 1.66 2.50 * PRSTTTBA3
1-1/4" PRSTTTB4 2.0 1.69 3.25 * PRSTTTBA4
1-1/2" PRSTTTB5 2.4 1.69 3.50 * PRSTTTBA5
2" PRSTTTB6 3.4 1.75 4.25 * PRSTTTBA6
* Unlimited wall thickness – determined by nipple used.
Visit www.plastibond.com
For more information
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