SADEV M7x45 Screw ST66 Gearbox – 5th Insert Fastener Clio 2 Gr N (0301331)

Why risk engine failure for a simple M7x45 SADEV screw?

Your ST66 SADEV dog-ring gearbox is precision machinery subjected to extreme stresses in your Renault Clio 2 Gr N. Every component, including this M7x45 screw (P/N: 0301331), plays a role in overall reliability. The purpose of this screw is to firmly secure the 5th gear threaded insert. Using a worn or inferior quality screw means taking the risk that it will fail or loosen.

The Consequences of a Failing 5th Gear Screw

• Immediate Loss of 5th Gear: If the screw loosens, the threaded insert and 5th gear can separate, making it impossible to engage the gear. Say goodbye to long straightaways and fuel savings during transfers.
• Catastrophic Damage: A loose component can lead to metal parts circulating in the gearbox, potentially destroying all gears, the differential, and the casing. This guarantees an unexpected and costly rebuild.
• Competition Interruption: The failure of a small fastening part can force you to retire. Don't lose valuable points for the sake of a few euros.

Genuine SADEV Screw: ST66 Security and Compliance

For an assembly that must withstand the shocks and vibrations of motorsport, only a genuine SADEV screw guarantees the required tightening torque and resistance. Optimiz Access supplies you with SADEV competition parts for:

• Renault Clio 2 Gr N (ST66 Gearbox)
• Renault Clio 2 X65 Cup
• Renault Clio 3 X85 Cup
• Renault Megane N4
• Twingo R2

Questions about Gearbox Assembly and Maintenance

Should threadlocker be used on this screw?

Yes, to ensure the anti-loosening security of this critical assembly, the use of a **strong threadlocker** is highly recommended, in addition to the torque specified by SADEV.

What complementary products are needed?

For a complete replacement of the 5th gear assembly, check the condition of the 5th gear threaded insert, the nut, and the anti-rotation shim. These complementary products are available at the bottom of this product page.

Where can I have my SADEV parts installed?

Entrust the installation of your transmission parts to our team of experts. Our workshop in the **Hauts de France** region (near Douai, Lille, Arras) specializes in the maintenance and customization of sports vehicles since 2010. We also ship this M7x45 screw worldwide.