.jpg?ts=1755907166 "Standard Flat Washers")
Stainless Steel Standard Flat Washers
What are standard flat washers? Standard flat washers are general-purpose round washers that distribute a fastener's load and protect the surface under a bolt or nut. Made from 18-8, 304, and 316 stainless, plus A2 and A4 metric, they resist rust in wet, coastal, and outdoor use.
Where standard flat washers fit best
Standard flat washers are the everyday washer for general fastening, sized to common bolt diameters without the oversized footprint of a fender washer or the specific pattern dimensions of USS and SAE. They spread clamping load, protect the surface from the turning nut, and provide a smooth bearing face. Match the inner diameter to your bolt and the grade to the environment, with 316 or A4 for coastal and saltwater exposure.
Why choose standard flat washers
- General purpose: the everyday washer for most fastening.
- Load spreading: distributes force and protects the surface.
- Grade range: 18-8, 304, 316, and metric A2/A4.
- Corrosion resistance: holds up in wet and outdoor use.
Common applications for standard flat washers
- General assembly under bolts and nuts
- Machinery, brackets, and fixtures
- Outdoor and wet-environment fastening
- Marine and coastal hardware (316 or A4)
For a wider footprint on thin material, see stainless fender washers, and browse USS, SAE, and every finish on the main flat washers category.
Standard Flat Washers FAQ
What grades do standard flat washers come in?
Inch in 18-8, 304, and 316, and metric in A2 and A4. A2 is comparable to 304 and A4 to 316.
What is the difference from a USS or SAE washer?
USS and SAE are specific dimensional patterns. Standard flat washers cover general sizing to common bolt diameters for everyday use.
Which grade for coastal use?
Use 316 or metric A4 for coastal and saltwater exposure, since they resist pitting better than 18-8, 304, or A2.