Duro Dyne 21242 11 Gauge J Corner with Nut and Bolt for Domj Flange

Product Description

The Duro Dyne 21242 is an 11 gauge steel J Corner with nut and bolt, designed for use with DOMJ J flange systems in ductwork assembly and installation. This corner piece is a critical component in duct flange connections, providing the structural integrity needed to join rectangular duct sections securely. HVAC technicians and sheet metal workers rely on J corners like this one to create tight, reliable connections at duct joints, helping to maintain airflow efficiency and reduce leakage across ventilation systems. The 21242 comes complete with a 3/8 inches nut and bolt, so no additional hardware is required for standard installations. Built from steel, this corner is made to hold up in demanding mechanical and commercial HVAC environments where durability and consistent clamping force matter. The J flange system is one of the most widely used methods for connecting rectangular ductwork, and having the right gauge corner piece ensures the joint holds under pressure. At 11 gauge, this corner offers solid thickness and resistance to deformation during assembly and long-term use. The height of approximately 4 and 21/50 inches makes it suitable for standard J flange duct configurations. Whether you are working on a new installation or replacing worn hardware on an existing system, the Duro Dyne 21242 is a straightforward, reliable choice for duct flange corner connections. It is compatible with DOMJ flange systems and is a go-to part for HVAC contractors, mechanical installers, and sheet metal fabricators who need dependable duct connection hardware on the job.

• Designed for use with DOMJ J flange duct systems
• Includes 3/8 inches nut and bolt for complete, ready-to-install assembly
• Constructed from steel for durability in commercial and mechanical HVAC applications

Product Highlights

The Duro Dyne 21242 J Corner with nut and bolt delivers a complete, hardware-included solution for J flange duct connections, built from steel to handle the demands of professional HVAC installation and service work.

Product Information

Standard Information

• Brand: DURO DYNE
• Manufacturer Part Number: 21242

Technical Specifications

• Gauge: 11
• Material: Steel
• Height: 4-21/50 inches
• Flange Compatibility: J Flange (DOMJ)
• Included Hardware: 3/8 inches nut and bolt