ARP M10 ID .850 OD SS washer

ARP M10 ID .850 OD SS washer (ARP Part #400-8746) is a precision-engineered fastener from ARP, the world leader in high-performance fasteners for the automotive industry.

These precision-ground washers are essential for proper load distribution and preventing fastener failure. ARP washers ensure even clamping force and protect component surfaces.

Every ARP fastener is precision CNC-machined from premium raw materials. The manufacturing process includes:

• Cold-forging for superior grain structure
• Precision thread rolling (not cutting) for maximum strength
• Heat treatment to exact specifications
• Magnetic particle inspection for quality assurance

Technical Specifications:

• Thread Size: M10

Applications: Ideal for high-performance street engines, racing applications, turbocharged and supercharged builds, and any application where fastener reliability is critical.

Trust ARP - the choice of professional engine builders and motorsport teams worldwide. When engine reliability matters, choose ARP.