Black Washers - 9/16 ID x 1 OD (10)

The Black Washers – 9/16 ID x 1 OD (10) are versatile fastener components suitable for various applications, including automotive builds and mechanical assemblies. These hardened washers are designed to distribute load evenly and prevent fastener pull-through on softer materials, making them essential for both professional mechanics and DIY enthusiasts.

Featuring a 9/16-inch inner diameter (ID) and a 1-inch outer diameter (OD), these washers provide a robust bearing surface that supports premium hardware under sustained load and vibration. The black oxide finish enhances corrosion resistance while maintaining a sleek appearance. Their precision geometry ensures proper seating against bolt heads and nuts, which is critical for maintaining clamping force in applications subject to thermal expansion and vibration.

Mechanics and builders will find these washers particularly beneficial when used with ARP fastening systems in various projects, including engine assembly and performance upgrades. Available in a convenient pack of 10, they are designed to integrate seamlessly into tight spaces without requiring modifications to existing hardware.