ARP 200-8550 M12 High Performance Washers with Chamfer 2-Piece Set

ARP 200-8550 high-performance washers are precision-engineered fastener components designed for use with cylinder head installations and other critical engine applications. These premium washers feature a chamfered inner diameter that provides proper clearance for the radius between bolt shanks and heads, ensuring optimal clamping force and load distribution.

Specifications:

• Inside Diameter: M12 (metric 12mm)
• Outside Diameter: 22.2mm (0.875 inches)
• Thickness: 3.0mm (0.120 inches)
• Material: 8740 chrome moly steel
• Finish: Black oxide coating for corrosion resistance
• Chamfered ID for proper bolt head clearance
• Parallel-ground and hardened for consistent performance

Features and Benefits:

• Constructed from premium 8740 chrome moly steel for exceptional strength and durability
• Precision parallel-ground surfaces ensure even load distribution
• Heat-treated and hardened to withstand high clamping loads
• Inner diameter chamfer accommodates the radius under bolt heads
• Black oxide finish provides corrosion protection and professional appearance
• Sold as a 2-piece set for convenience

These ARP washers are ideal for high-performance and racing applications where maximum fastener reliability is critical. The chamfered design is particularly important when used with ARP head bolts and studs to achieve proper torque values and prevent washer deformation. ARP washers meet or exceed the quality standards required for professional engine building and competition use.