Black Washers - 5/16 ID x .675 OD (10)

ARP's Black Washers in 5/16 inch ID x .675 inch OD (pack of 10) are essential fastener components suitable for various applications, including automotive and general assembly tasks. These washers help distribute clamping force evenly across fastener joints, preventing galling and loosening under vibration.

The 5/16 inch inner diameter accommodates standard 5/16-inch fasteners, while the .675 inch outer diameter provides a substantial bearing surface, critical for soft materials like aluminum or composite gasket surfaces. ARP's black oxide coating resists corrosion and enhances lubricity during assembly, ensuring accurate torque-to-clamp-load conversion.

These washers are ideal for professionals and enthusiasts who require reliable performance in various assembly tasks, ensuring dimensional consistency and integrity under load. Whether used in engine builds or other high-stress applications, ARP washers are designed to meet demanding requirements.