ARP 200-8583 Chrome Moly Washers with Chamfer 5/16" ID 13/16" OD 2-Pack

The ARP 200-8583 is a pair of high-performance chrome moly washers designed for use with cylinder head fasteners and other critical engine hardware. These precision-manufactured washers feature an inside diameter (I.D.) chamfer that helps properly seat bolts and studs while distributing clamping loads evenly across the fastener assembly.

Key Specifications:

• Inside Diameter: 5/16 inch
• Outside Diameter: 13/16 inch (0.813 inch)
• Thickness: 0.120 inch
• Material: 8740 Chrome Moly steel
• I.D. chamfer for proper fastener seating
• Black oxide finish for corrosion resistance
• Hardened and parallel-ground for precision
• Quantity: 2 pieces per package

Why Choose ARP Washers:

ARP washers are manufactured to the same exacting standards as their world-renowned fasteners. Each washer is constructed from premium 8740 chrome moly steel, hardened for durability, and precision parallel-ground to ensure consistent clamping force. The I.D. chamfer on these washers allows the fastener head or nut to seat properly, reducing stress concentrations and preventing washer failure under high loads. The black oxide finish provides corrosion resistance while maintaining accurate torque readings.

These washers are ideal for cylinder head installations, connecting rod bolts, main cap studs, and other critical engine fastener applications where precision and reliability are essential. Available in a convenient 2-pack, they're perfect for small repairs or building up your fastener inventory.