M8 Copper-Plated Exhaust Lock Nuts | Hex Turbo Stud 12/50 Pack
M8 Copper-Plated Exhaust Lock Nuts | Hex Turbo Stud 12/50 Pack
Keep your exhaust system and turbo components fastened securely with these M8 Copper-Plated Exhaust Lock Nuts. Engineered for high-temperature environments, the copper plating provides excellent corrosion resistance and helps prevent galling — making removal easier during future servicing. Perfect for turbo manifolds, exhaust headers, downpipes, and stud applications where reliable clamping force matters.
Key Features
- Copper-Plated Finish: Resists corrosion and high-heat oxidation, ideal for exhaust and turbo environments
- Hex Head Design: Standard hex profile fits common wrench and socket sizes for easy installation and removal
- M8 Thread Size: Widely compatible with exhaust manifold studs, turbocharger hardware, and related fasteners
- Lock Nut Construction: Designed to resist loosening from vibration and thermal cycling
- Multi-Pack Options: Available in 12-piece or 50-piece packs — stock up for a full build or quick repair
- Compact Size: Approximately 17.4 × 9.2 mm — a precise fit for M8 stud applications
Specifications
| Thread Size | M8 |
| Dimensions | ~17.4 × 9.2 mm |
| Material | Metal with copper plating |
| Head Type | Hex (hexagonal) |
| Pack Size | 12 pcs or 50 pcs |
| Country of Origin | Made in China |
Ideal Applications
- Turbocharger inlet/outlet flanges
- Exhaust manifold stud nuts
- Downpipe and header connections
- General high-temperature fastening tasks
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Note: Actual color may vary slightly from images due to monitor settings and lighting conditions. Please allow a slight measurement tolerance of ±0.5 mm.
Learn more: FuelEconomy.gov driving efficiency guidance
Frequently Asked Questions
Q: What size wrench is needed for these M8 copper-plated hex exhaust nuts?
A: These M8 hex head exhaust lock nuts are approximately 17.4 × 9.2 mm. A standard 13 mm wrench or socket is typically used for M8 hex nuts, though we recommend measuring your specific application to confirm the correct tool size before installation.
Q: Are these copper-plated exhaust lock nuts suitable for turbocharged engines?
A: Yes. The copper plating is specifically chosen for high-temperature automotive applications such as turbocharger flanges and exhaust manifolds. The coating helps reduce galling on studs and makes future removal much easier compared to uncoated steel nuts.
Q: What is the difference between the 12-pack and 50-pack options?
A: Both packs contain the same M8 copper-plated exhaust lock nuts. The 12-piece pack is great for a single repair or small job, while the 50-piece pack offers better value for full engine builds, workshop stock, or multiple vehicle projects.