ARP 400-8456 Stainless Steel Chamfered Washer 5/16" ID 0.655" OD

The ARP 400-8456 is a precision-engineered stainless steel washer featuring an inner diameter chamfer for high-performance automotive, racing, and powersports applications. Part of ARP's Special Purpose washer line, this component is designed to provide optimal load distribution and secure fastening in demanding environments.

Key Specifications:

• Inside Diameter (ID): 5/16 inch (0.3125")
• Outside Diameter (OD): 0.655 inch
• Material: Stainless steel construction for superior corrosion resistance
• Features inner diameter chamfer for improved fastener seating
• Parallel-ground for precise, flat mating surfaces
• Polished finish

ARP stainless steel washers are manufactured to exacting tolerances and provide excellent durability in applications where corrosion resistance is critical. The chamfered inner diameter ensures proper alignment and stress distribution when used with bolts and studs. These washers are ideal for engine components, exhaust systems, suspension assemblies, and other high-performance applications where reliability matters.