1963-1964 C2 Antenna Mast Nut 3820674 - OEM Number(s) (3820674)
1963–1964 Corvette C2 Antenna Mast Nut | GM# 3820674
When it comes to your mid-year Corvette, every detail matters—including the often-overlooked antenna mast nut. This 1963–1964 Corvette C2 Antenna Mast Nut, a precise reproduction of GM part number 3820674, is engineered to secure your antenna mast with factory-correct style and function.
Lock It Down. Keep It Original.
Whether you're restoring your Sting Ray or replacing a missing piece, this chrome-finished mast nut threads directly into your antenna bezel to hold the mast firmly in place. Without it, your antenna may wobble, detach, or underperform—compromising both reception and appearance.
Designed to match OE specifications, this part ensures your antenna assembly stays secure while retaining the correct visual profile. The gleaming chrome finish blends seamlessly with your C2’s exterior trim, making this a smart upgrade for any concours-quality or driver-level restoration.
Why It Matters:
A missing or incorrect mast nut not only diminishes your Corvette’s period-correct look—it can lead to antenna performance issues and water intrusion at the base. This replacement ensures integrity, both functionally and visually.
Product Features:
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Replaces GM Part# 3820674
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Fits all 1963–1964 Corvette C2 models
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Chrome finish for authentic appearance
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Threads cleanly into OEM-style bezels
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Designed to hold factory-style antenna masts
Restore the little details that complete your Corvette the right way
Also Fits:
- 1964 Chevelle
- 1963-1964 Impala
- 1963-1966 Chevrolet Pickup Trucks
- 1963-1964 Nova
Also known under these part numbers: (For reference only)
- 162006
- 1658
- 200021
- 25-118066-1
- 3820674
- 686420085430
- A-201
- EC155