ARP 200-8547 Special Purpose Washers 3/8" ID with Chamfer

The ARP 200-8547 are high-performance washers designed for demanding automotive, racing, and powersports applications. These quality washers feature an oversized inside diameter to clear most under-bolt head radii, making them ideal for use with cylinder head bolts, studs, and other critical engine fasteners.

Key Features:

• 3/8" (9.525mm) inside diameter with 0.750" (19.050mm) outside diameter
• 0.120" (3.048mm) thickness for optimal load distribution
• Inside diameter chamfer for clearance around bolt head radius
• Constructed from premium chromoly steel and heat-treated for superior strength
• Black oxide finish for corrosion resistance
• Parallel-ground and hardened for consistent performance
• Sold as a pair (2 pieces)

ARP washers are engineered to provide even load distribution and prevent fastener failure in high-stress applications. The chamfered inside diameter accommodates the radius transition between the bolt shank and head, ensuring proper seating and maximum clamping force. Whether you're building a race engine, performing a head gasket replacement, or assembling any high-performance application, these washers deliver the precision and reliability ARP is known for.