Fastener Superstore Blog
SAE, USS, Machine Screw and Nylon Flat Washers
October 17, 2018
Fastener SuperStore carries flat washers in a wide variety of styles, sizes, materials and finishes.
Machine Screw Flat Washers - This style is common in smaller sizes, going from a #2 screw hole up to 3/8". They are also the thinnest type of flat washer, working best with machine screws and machine screw nuts. Our selection includes 18-8 stainless steel, along with steel with a zinc, black oxide, black zinc or yellow zinc finish.
USS Flat Washers - These are the largest of the flat washers, offering greater thickness and outer diameters, and offered in sizes up to 3". Our USS washers are available in all the same materials and finishes as machine screw washers, as well as in 316 stainless steel and in steel with a galvanized finish.
SAE Flat Washers - Sized between machine screw and USS flat washers, this style was designed primarily to be used in automotive applications. They are available in diameters up to 1 1/2" and in the same materials as USS washers.
Nylon Washers - We carry hole sizes #2 up through 1/4". Each size is available in four different thickness options.