ARP 400-8507 Chrome Moly Hardened Washers with Chamfer

The ARP 400-8507 is a premium chrome moly washer designed for high-performance engine applications. These washers feature an inside diameter chamfer for optimal load distribution and are manufactured to exacting standards for critical fastener assemblies.

Key Features:

• Constructed from premium chrome moly steel for superior strength and durability
• Parallel-ground surfaces ensure uniform clamping load distribution
• Heat-treated and hardened for maximum performance under extreme stress
• Inside diameter chamfer provides proper seating and reduces stress concentration
• Black oxide finish for corrosion resistance and professional appearance
• Precision-manufactured to ARP's strict quality standards

ARP washers are engineered specifically for use with high-performance fasteners in racing and performance engine builds. The chamfered design allows the washer to properly seat against the cylinder head surface while accommodating the underhead radius of ARP fasteners. Each washer is individually inspected to ensure it meets ARP's demanding specifications for thickness, hardness, and surface finish.

Ideal for cylinder head installations, connecting rod applications, and other critical fastener locations where precise clamping force and reliability are essential. ARP washers are a crucial component in any professional engine assembly.