#12 Washer Dimensions & Size
Disclaimer: Washer dimensions and tolerances may vary by standard, manufacturer, material, or finish. Always confirm critical dimensions using the official product datasheet before installation.
| SAE Standard | |||
|---|---|---|---|
| Dimensions | Nominal Size (in) | Actual Size (in) | |
| Min | Max | ||
| Inner Diameter | 1/4 | 0.245 | 0.265 |
| Outer Diameter | 9/16 | 0.557 | 0.577 |
| Thickness | Not specified | 0.051 | 0.080 |
Frequently Asked Questions
What is the difference between USS and SAE washer standards?
USS (United States Standard) washers generally have a larger outer diameter and thicker profile, making them suitable for structural and general-purpose applications. SAE (Society of Automotive Engineers) washers are typically smaller and thinner, designed for compact assemblies and machine screw applications.
What size is a #12 washer?
A #12 washer is designed to fit #12 screws. Under the SAE standard, it typically has a nominal inner diameter of 1/4″ and a nominal outer diameter of 9/16″.
What is the inner diameter of a #12 washer?
The inner diameter of a #12 SAE washer is typically 1/4″, allowing proper clearance for a #12 machine screw.
What is the outer diameter of a #12 washer?
The outer diameter of a #12 SAE washer is usually 9/16″.
How thick is a #12 washer?
#12 SAE washers typically have a thickness ranging from 0.051 to 0.080 inch, depending on manufacturer and material.