Ventilation Duct G Clamp

SuperAir Ventilation Duct G-clamps are designed to fasten rectangular ventilation ducts.

Ventilation Duct G Clamps, also known as Air Duct Clamps or Duct Flange G-Clamps, are part of duct fittings; they are usually used on duct flange profiles.

Product Details:

Customized Galvanized Steel Ventilation Duct G-Clamps

What are Ventilation Duct G Clamps?

Ventilation duct G-clamps are part of the HVAC duct fittings used to secure duct flange profiles to connect two rectangular ducts.

Ventilation duct G-clamps, also called Duct Flange G-clamps or Air Duct clamps,  are widely used in HVAC and air conditioning installation, like rectangular ductwork projects and connecting rectangular air conditioning ducts. All Ventilation Duct G-clamps are delivered with pre-installed M8 x 25mm screws.

air duct universal flange g clamp

SuperAir is a professional ventilation mounting accessories manufacturer and supplier in China, engaged in the design, complete installation, and metal component production of ventilation projects. We specialize in HVAC products, especially Ventilation Ductwork and Air Conditioning Installation. We have more than 30 semi-automatic and automatic stamping machines with capacities from 16 to 500 tons. Our manufacturing processes include blanking, punching, bending, forming, deep drawing, cold rolled sheet, hot rolled sheet, galvanized sheet, stainless steel, aluminum, copper, brass, and other raw materials processing…



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SuperAir Ventilation Duct G-Clamps

How to use Ventilation Duct G-clamps?

SuperAir Ventilation Duct G-clamps are usually designed to fasten rectangular ventilation ducts. They are used for joining series 20 duct flanges, series 30 duct flanges, and series 40 duct flanges. To ensure a secure and strong connection on the duct flanges, ventilation duct G-clamps are usually used in conjunction with corners,  two ventilation duct G-clamps/corners are recommended not to exceed 250 mm in length along the rectangular flanges.

Ventilation Duct G clamps are used not only to join two rectangular duct sections. SuperAir Ventilation Duct G clamps with a 25 mm screw bolt can be used for fastening rectangular ducts to square fire dampers and multi-blade ventilation dampers.

air duct universal flange g clamp

Alternatives to Ventilation Duct G clamp

Ventilation Duct G clamps are the most common way to join rectangular ducts, and the alternative solution is flange duct cleats.

air duct universal flange g clamp


  • Material: Galvanized steel sheet
  • Application: Fixing flange in the ventilation rectangular duct for the HVAC system
  • Surface treatment: Zinc plating
  • Thickness: 2.0mm-3mm
  • Screw Bolt size: M8x25mm, option: M8x20mm, M8x22mm,
  • Simple operation and easy installation.
  • Can be customized according to your drawings, support for special sizes
  • Stainless steel AISI304 and AISI316 are available on request.


SuperAir owns five progressive die-pressing machine lines in our production facilities. Their total capacity is from 80T to 160 T. Many of our products have been upgraded from single-transfer to progressive die due to the high efficiency and stable quality. They are used for making perforated bands, duct corners, G-clamps, and duct holders.

Progressive Die-Pressing Production Line for G-clamps

SuperAir has also built state-of-the-art automated tapping and screwing machines that greatly increase productivity.

Automatic Tapping and Screwing Machine for G-Clamps
SuperAir Ventilation Duct G-clamps packing
g clamp
Ventilation Duct G Clamps Connection method


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SuperAir Ventilation Duct g clamps drawing
Description Thickness Material Packing
G-Clamp 2.5 2.5mm Galvanized Steel 200pcs/box
G-Clamp 3.0 3.0mm Galvanized Steel 200pcs/box


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