Can flat washers be used with metric and imperial fasteners?

Flat washers are indispensable components in countless fastening applications, providing crucial support and protection for threaded connections. These thin, disc-shaped devices with a center hole are designed to distribute the load of a threaded fastener over a larger surface area. They play a vital role in preventing surface damage, reducing friction, and ensuring even load distribution. These versatile components come in a wide range of sizes and materials to suit a broad spectrum of applications in construction, manufacturing, and general fastening.

Metric fasteners utilize the metric system of measurement, typically measured in millimeters, while imperial fasteners use inches. This fundamental difference in measuring systems raises questions regarding compatibility with flat washers.



When using flat washers with fasteners, the primary consideration is the washer's inner diameter. The inner diameter must precisely match the diameter of the fastener being used to ensure proper fit and function within the fastener assembly.

For metric fasteners, use washers with metric inner diameters. Conversely, for imperial fasteners, use washers with imperial inner diameters. This ensures seamless integration and optimal performance of the washer within the fastening application.

For instance, if you are using a metric bolt with a diameter of M6, you should choose a washer with an inner diameter of M6. Similarly, if using an imperial bolt with a diameter of 1/4 inch, select a washer with an inner diameter of 1/4 inch.