AC Infinity 4-Inch Heavy-Duty Stainless Steel Duct Clamps, 2-Pack

Marine-grade SAE 316 stainless steel construction with dual-head worm-drive locks for 4-inch ventilation components.

The AC Infinity AC-DCA4-2 is a professional-grade 2-pack of 4-inch metal duct clamps, designed to create airtight, heavy duty connections between flexible ducting, carbon filters, inline exhaust fans and back-draft dampers. Made from SAE Grade 316 stainless steel, these clamps offer excellent resistance to corrosion and rust in humid grow tents, HVAC setups and industrial ventilation systems.

Each clamp features a precision worm-drive locking mechanism to help prevent slipping or binding under tension. The dual head screw accommodates both flat-head and Phillips screwdrivers for quick installation and adjustment. A protective gloss finish helps maintain a secure seal during long-term use.

Key Differences

• Marine-grade SAE 316 alloy: Superior chemical and corrosion resistance compared with standard 201 or 304 stainless steel, making it well suited to high-humidity grow rooms.
• Precision non-slip worm drive: Helps prevent gear slipping, thread stripping and sticking when torque is applied.
• Dual-head fastener: Works with both Phillips and flat-head screwdrivers.
• Protective gloss finish: Helps prevent surface oxidation and protects flexible aluminium or canvas ducting from fraying at the edges.

Key Product Features

• SAE Grade 316 stainless steel: Marine-grade construction provides excellent structural integrity, rust protection and corrosion resistance.
• Dual-head worm-drive lock: Enables smooth, secure tightening with common hand tools.
• Airtight mechanical seal: Secures flexible aluminium ducting, carbon filters and inline fan flanges to help prevent air leaks and odour bypass.
• Protective anti-rust finish: Designed for use in high-moisture ventilation setups.
• Convenient 2-pack: Includes two matching 4-inch clamps for securing both ends of a ventilation line.

Technical Specifications

Real-World Applications

• Indoor cultivation ventilation: Secures 4-inch flexible ducting to inline duct fans, such as AC Infinity CLOUDLINE Series fans, and activated carbon filters inside grow tents.
• HVAC and dryer venting: Connects rigid or flexible 4-inch ducting for bathroom exhaust fans, kitchen range hoods and clothes dryer outlets.
• Odour and air-leak prevention: Helps create an airtight seal over rubber couplers, back-draft dampers and duct reducers.