Black Hex Nut 51 18 1 823 474

Ensure reliable, corrosion-resistant fastening of critical components with the genuine black hex nut (part 51 18 1 823 474). This premium OEM fastener features a durable black zinc-plated finish and precise thread dimensions to match BMW’s factory specifications.

Key Benefits

• Exact OEM Specification
  Manufactured to BMW’s original CAD tolerances for seamless compatibility with stock bolts and studs—no modifications required.

• Black Zinc Finish
  Provides superior corrosion protection and a sleek appearance that blends with underbody and suspension hardware.

• High-Strength Steel
  Hardened alloy construction withstands vibration, torque and environmental exposure without thread deformation.

• Secure Clamping
  Standard hex profile allows reliable torque application with common tools, ensuring proper clamp load.

• Versatile Application
  Commonly used on control arms, subframes, strut towers and other chassis or drivetrain mounting points.

Technical Specifications

• Part Number: 51 18 1 823 474

• Thread Size: M12 × 1.5

• Material: Grade 10.9 alloy steel

• Finish: Black zinc electroplate

• Hex Size: 17 mm across flats

• Operating Temperature: –40 °C … +120 °C

• Warranty: 24 months genuine-parts coverage

Installation Overview

1. Align Components: Position the mating parts and insert the OEM bolt or stud.

2. Hand-Thread Nut: Engage the nut fully by hand to avoid cross-threading.

3. Torque to Spec: Using a calibrated wrench, tighten the nut to BMW’s torque recommendation for the specific application.

4. Inspect: Verify proper seating and ensure there is no play or loosening under load.