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Galvanized steel roof curb adapter, 30 in to 33 1/2 in, 18 ga, 5 in height

Dayton

Dayton 3AZK6 Trap 30 in Curb 33 1/2 in Fan 18 ga

SKU CH-08ZG-5BPHG MPN 3AZK6

Adapts a 33 1/2 in fan base to fit a 30 in roof curb using 18 ga galvanised steel with 12 included fasteners

  • TypeDrain Components
  • Adapts 34 in fan base to 30 in curb for secure fit
  • Galvanized steel construction with 18 ga thickness resists corrosion
  • Includes 12 sets of 1/4-20 bolts and speed nuts for installation
  • Works with downblast, upblast and filtered supply fans
  • 5 in overall height with 2 1/2 in top flange provides clearance

Roof Curb Reducer Adapter

This galvanized steel roof curb adapter reduces a 34 in fan base to fit a 30 in curb. It is designed for downblast, upblast and filtered supply fans. The adapter includes twelve 1/4-20 Tinnerman speed nuts and matching bolts for secure installation.

Installers Matching Specific Fan and Curb Sizes

The adapter suits technicians connecting 33 1/2 in fan bases to 30 in square curbs. It is not intended for applications where the fan base and curb dimensions differ from those listed. Projects requiring a different reduction ratio or non-galvanized material should look elsewhere.

18 ga Steel Thickness

The adapter is formed from 18 ga galvanized steel, providing structural rigidity and corrosion resistance for rooftop mounting. This metal thickness determines load-bearing capacity and durability in outdoor exposure. Verify that the gauge meets the project specification before ordering.

Highlights

  • Adapts 34 in fan base to 30 in curb for secure fit
  • Galvanized steel construction with 18 ga thickness resists corrosion
  • Includes 12 sets of 1/4-20 bolts and speed nuts for installation
  • Works with downblast, upblast and filtered supply fans
  • 5 in overall height with 2 1/2 in top flange provides clearance

Specifications

TypeDrain Components
BrandDayton
Model3AZK6

Questions about this item

What fasteners must I already have to mount the 30 in curb adapter to the roof curb?

The adapter includes twelve 1/4-20 Tinnerman speed nuts and twelve 1/4-20 x 3/4 bolts, three per side, so no separate fasteners are required for the curb connection.

Will the 33 1/2 in fan flange align with the bolt pattern on my existing downblast fan base?

The adapter reduces a 34 in fan base to fit a 30 in curb and is designed for downblast, filtered supply and upblast fans, so the flange matches standard bolt patterns for those fan types.

How can I confirm the 18 ga steel adapter is seated correctly after installation?

Verify that the top flange sits 2 1/2 in high, the overall height measures 5 in, and all twelve bolts are tight with the speed nuts fully engaged on each side.

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