ARP 200-8588 Chrome Moly Hardened Washers I.D. - 3/8 10-Piece

These precision-engineered washers feature a 3/8" inside diameter with no chamfer, making them ideal for use with cylinder head fasteners and other critical engine components.

Key Features:

• Constructed from premium chrome moly steel for superior strength and durability
• Parallel-ground surfaces ensure even load distribution and proper clamping force
• Heat-treated and hardened to prevent crushing under high torque loads
• Black oxide finish provides corrosion resistance and professional appearance
• 3/8" inside diameter with no I.D. chamfer
• Precision-manufactured to strict tolerances for consistent performance
• Convenient 10-piece package for multiple installations or inventory stock

ARP washers are essential components when installing high-performance fasteners, as they help distribute clamping loads evenly across the fastener surface and prevent damage to aluminum cylinder heads and other soft materials. These washers meet the exacting standards required for racing and performance engine builds where reliability is critical.