5/16 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.
| USS Standard | |||
|---|---|---|---|
| Dimensions | Nominal Size (in) | Actual Size (in) | |
| Min | Max | ||
| Inner Diameter | 3/8 | 0.370 | 0.370 |
| Outer Diameter | 7/8 | 0.390 | 0.390 |
| Thickness | Not specified | 0.064 | 0.104 |
| SAE Standard | |||
|---|---|---|---|
| Dimensions | Nominal Size (in) | Actual Size (in) | |
| Min | Max | ||
| Inner Diameter | 11/32 | 0.339 | 0.359 |
| Outer Diameter | 11/16 | 0.681 | 0.703 |
| 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. While SAE (Society of Automotive Engineers) washers are typically smaller and thinner, designed for more compact and tighter fit assemblies.
What size is a 5/16″ washer?
The size of a 5/16″ washer depends on the standard. Under the USS standard, it typically has a nominal inner diameter of 3/8″ and a nominal outer diameter of 7/8″. Under the SAE standard, it usually has a nominal inner diameter of 11/32″ and a nominal outer diameter of 11/16″.
What is the inner diameter of a 5/16″ washer?
The inner diameter is larger than the bolt size to allow clearance. It is typically 3/8″ for USS washers and 11/32″ for SAE washers.
What is the outer diameter of a 5/16″ washer?
The outer diameter varies by standard, with 7/8″ for USS washers and 11/16″ for SAE washers.
How thick is a 5/16″ washer?
Washer thickness varies by standard and manufacturer; however, under USS standard 5/16″ washers typically range from 0.064 to 0.104 inch in thickness. while under the SAE standart usually have a range from 0.051 to 0.080 inch in thickness