Carlisle Hardcast 308846 J Flange 12 Inch 50 Pack

Product Description

The CARLISLE HARDCAST 308846 is a roll-formed galvanized steel J Flange designed for sheet metal ductwork assembly in commercial and residential HVAC installations. Each section is hollow roll-formed and contains an integral synthetic resin sealant that bonds directly to metal surfaces. The sealant is rated non-flow up to 180 degrees F and retains its sealing properties indefinitely, eliminating the need for a separate field-applied sealant step. This listing includes 50 sections, each measuring 12 inches in length. Licensed sheet metal workers and HVAC mechanical contractors are the primary installers of this product.

J Flanges are used in low-pressure rectangular duct systems where duct sections are connected using a slip-and-drive or flange-and-cleat assembly method. The integral sealant simplifies the connection process on mechanical rooms, rooftop units, and air handler takeoffs where consistent sealing across multiple duct joints is required. The 50-section pack is sized for job-site quantities typical of commercial duct fabrication runs.

Key Features

• Hollow roll-formed galvanized steel construction for consistent profile and corrosion resistance
• Integral synthetic resin sealant eliminates separate sealant application at the joint
• Non-flow sealant rated to 180 degrees F maintains seal integrity in warm duct environments
• Sealant retains sealing properties indefinitely under normal duct operating conditions
• Each section is 12 inches long, packaged 50 sections per order

Compatibility

Designed as an OEM-style component for low-pressure rectangular sheet metal ductwork systems requiring J-style flange connections in commercial and residential HVAC applications.

Installation Notes

Installation is typically performed by licensed sheet metal workers or HVAC mechanical contractors following SMACNA duct construction standards. De-energize all associated air handling equipment before working on duct sections. Ensure mating duct edges are clean and free of burrs before seating the J Flange to allow the integral sealant to achieve full contact. Do not apply additional duct sealants over the integral sealant without verifying compatibility.