Four Bolt Flange

The Hardcast Four Bolt Duct Connection System is designed to provide a simple and effective means of connecting rectangular duct sections together. This connection system may be used on all rectangular duct from 14 GA to 26 GA, resulting in sealed joints with clean lines that are aesthetically pleasing.

Four Bolt Flange Products

Four Bolt Flange Documents

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Tech Tip Volume 12 - Shelf Life and Batch Code Decoding
Nexus Gaskets are self-adhering, help to seal air out, come in EPDM, Neoprene, and Butyl, and are part of the Nexus Four-Bolt Connection System. The system is designed to provide a simple and effective means of connecting 14 GA to 26 GA rectangular duct sections together, resulting in sealed joints with clear lines that are aesthetically pleasing. 
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