Overview
The RD-3-4812-0 3″ adapter plate is an OEM Red Dot component used to adapt or secure a 3-inch air duct connection within a heating or A/C unit installation. Adapter plates like this ensure correct airflow routing and provide a firm mounting surface for ducting connections.
Key Features
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Genuine Red Dot OEM component
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Designed for 3-inch ducting interfaces
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Provides a secure, sealed mounting point
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Heavy-duty construction for off-highway and vocational equipment
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Direct replacement—matches original geometry
Compatibility
The Red Dot catalog confirms RD-3-4812-0 as an active part number, but no specific unit family is published.
Use case typically includes:
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HVAC duct transitions
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Fresh-air or recirculation inlet adapter plates
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Plenum or housing-mounted duct interfaces
If you need me to tie this to specific BTRAC equipment or a specific heater/AC unit family, just drop in any internal notes or where it appears on your in-house parts lists.
When to Replace
Replace the RD-3-4812-0 adapter plate if you observe:
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Cracks, broken mounting tabs, or distortion
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Poor duct fitment or air leakage
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Corrosion or physical damage
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Missing or loose plate causing airflow loss
Typical Applications
While the catalog does not list the application explicitly, adapter plates like this are commonly found on:
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Red Dot heater/A/C housings
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Fresh-air inlets
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Transition points between blower housings and cab ducts
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Recirculation or defrost duct mounting surfaces
Interchange Numbers:
10-0062, 975-7311, RD-3-4812-0P, RDHRD348120P,
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