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The Bard 113-731BX Exhaust Damper Hinge (boxed) is an OEM hinge bracket used in the exhaust damper assembly on Bard MEGA-TEC wall mount air conditioners, helping the exhaust damper blade pivot smoothly and stay properly aligned during ventilation operation. Replacing a worn or bent hinge can correct sticking dampers, reduce unwanted air leakage, and support dependable damper actuation when the unit is calling for fresh air or building pressure control. As a genuine Bard service part, 113-731BX is built to match factory fit and mounting points, making it a reliable choice when servicing the exhaust damper hardware on compatible W090A, W120A, and W150A series units.
Bard uses suffixes like "BX" to manage parts internally. These do not change the physical form or function of the part.
A part number ending in "BX" simply means it is packaged in a box for shipping, rather than for internal assembly use.
Example: 8406-142BX is physically identical to 8406-142.