The 300 Series: 302/303/304/A2 Stainless Steel Hex Flat Washers

302 Stainless Steel Flat Washers300 series stainless is also known as 18-8 stainless steel because it typically consists of 18% chromium and 8% nickel. 300 series stainless steel has excellent corrosion resistance and is generally non-magnetic. It is an excellent material to use for general outdoor purposes. It can withstand standard environmental conditions without corroding. It is a far superior material to use compared to steel products when it is exposed to the elements. The 300 series stainless properties are below.

300 Series Stainless Steel Properties

Cr

Ni

Max C

MaxMn

Max P

Max S

Mo

Max Si

302 stainless

17-19%

8-10%

0.15%

2%

0.045%

0.03%

1%

303 stainless

17-19%

8-10%

0.15%

2%

0.02%

0.15% min

0.6% max

1%

304 stainless

18-20%

8-10.5%

0.08%

2%

0.45%

0.03%

1%

We carry a large selection of flat washers in 300 series stainless steel. Our standard off the shelf items include commercial flat washers, MS flat washers, AN960C, NAS, and fender washers. If you are looking for a 18-8 flat washer that is not off the shelf, we can make 18-8 washers specifically to the dimensions that you need. Our custom runs can be as low as 100 pieces all the way to hundreds of thousands. We can supply washers as small as 0.062 inside diameter all the way to 12”.  If you are looking for thin washer (0.002” thick) to a thicker washer, 1/2” thick, we can supply it.