STG Conduit Hubs

Allied Tube & Conduit PVC coated STG 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 bulkheads up to 1/8″ thick. STTTB style hubs perform the same function for unlimited wall thicknesses.


  • Exterior PVC coating thickness is a minimum 0.040″
  • Interior Urethane coating thickness is a minimum 0.002″
  • STG and STTB available in 12 trade sizes from 1/2″ through 6″
  • STTTB in sizes from 1/2″ through 2″
  • Sealing sleeves on conduit side of hub
  • Molded PVC gasket seals flush with enclosure wall
  • Neoprene O-ring gasket provides additional seal
  • The length of the sleeve extension(s) shall be at least equivalent to the nominal conduit size for sizes 1/2″- 2″
  • For sizes 2-1/2″- 6″, the length of the sleeve extension(s) shall be at least 2″


  • UL 514B
  • NEC/CEC:
    • Class I, Division 2
    • Class II, Division 1 & 2
    • Class III, Division 1 & 2
    • Class I, Zone 1, AEx e II
    • Class I, Zone 1, Ex e II
  • 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 1
Item NumberTrade Size (in)ABCMax Wall ThicknessWeight Per 100 (lbs)
PV1200STG41 1/42.943.252.280.12540
PV1500STG51 1/
PV2500STG72 1/24.224.753.280.125150
PV3500STG93 1/24.385.53.440.125300
PA0500STAG11/21.8421.310.125Contact Factory
PA0700STAG23/ Factory
PA1000STAG312.662.52.030.125Contact Factory
PA1200STAG41 1/42.943.252.280.125Contact Factory
PA1500STAG51 1/ Factory
PA2000STAG623.754.253.090.125Contact Factory
PA2500STAG72 1/24.224.753.280.125Contact Factory
PA3000STAG834.315.253.380.125Contact Factory
PA3500STAG93 1/24.385.53.440.125Contact Factory
PA4000STAG1044.446.253.50.125Contact Factory
PA5000STAG1154.947.540.125Contact Factory
PA6000STAG12658.540.125Contact Factory