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

Viewing 1 to 5 of 17 results
Product Guide
Tech Tip Volume 12 - Shelf Life and Batch Code Decoding
Tech Tip Volume 12 - Shelf Life and Batch Code Decoding
Hardcast DynAir - 23 3300 Air Duct Accessories Master Specification
Multi-Matic TDC & TDF Corners TDS
The Nexus Multi-Matic TDC/TDF corners are designed for both use in automatic insertion machines or for hand assembly. The Corners are flanged and embossed to provide strength and rigidity. The corner piece has a square bolt hole to accommodate compatible carriage bolts allowing for field assembly with a single wrench. Corners are pre-punched near bolt hole to accommodate #10 sheet metal screws that can be used as a replacement to the bolts.
Nexus Gaskets TDS
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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