Dundas Jafine MC4ZW Metal Worm Gear Clamp 4 Inches

Product Description

The DUNDAS JAFINE MC4ZW is a 4-inch metal worm gear clamp built for securing semi-rigid and rigid aluminum ductwork in HVAC installations. Constructed from heavy-duty galvanized steel, this clamp provides a firm, corrosion-resistant connection at duct-to-pipe or duct-to-elbow joints. The worm gear drive mechanism allows precise tightening, making it a reliable mechanical fastener for maintaining airtight duct connections. Licensed HVAC technicians and sheet metal installers use this type of clamp as a standard component when assembling or servicing aluminum duct systems in both residential and light commercial applications.

The MC4ZW is suited for 4-inch diameter semi-rigid or rigid aluminum duct systems commonly found in dryer venting, range hood exhaust, and HVAC supply or return runs. It is applied wherever a positive mechanical clamp is needed to secure a duct section to a fitting, elbow, or transition collar. The galvanized steel construction holds up in attic, crawlspace, and mechanical room environments where moisture exposure is a concern.

Key Features

• Fits 4-inch semi-rigid and rigid aluminum duct connections
• Heavy-duty galvanized steel construction resists corrosion
• Worm gear drive mechanism provides precise, even clamping force
• Suitable for fastening ducts to aluminum pipes, elbows, and collars
• Consistent mechanical seal helps maintain duct system integrity

Compatibility

Designed as an OEM-style replacement and standard accessory clamp for 4-inch semi-rigid and rigid aluminum duct assemblies in residential and light commercial HVAC, dryer vent, and exhaust duct systems.

Installation Notes

Installation is performed by licensed HVAC technicians or qualified sheet metal installers. Power down or de-energize any associated HVAC equipment before working on ductwork. Slide the clamp over the duct end before inserting it onto the fitting, then tighten the worm gear screw with a flat-head screwdriver or nut driver until the duct is firmly secured. Duct installations should comply with applicable local mechanical codes and manufacturer duct system guidelines.

Technical Specifications

• Clamp Size: 4 inches
• Material: Galvanized steel
• Clamp Type: Worm gear
• Compatible Duct Type: Semi-rigid and rigid aluminum duct

Standard Information

• Brand: DUNDAS JAFINE
• Manufacturer Part Number: MC4ZW