7/16" x 1/2" x 1-1/4" Polished 18-8 Stainless Steel USS Flat Washers (6 pcs.) Diameter: 1/2" Diameter 2: 1-1/4" Thickness: 5/64" Material: Stainless Steel Finish: Polished Hardness: 18-8 Style: USS Type: Flat Washer Box of 6. A flat washer is a thin, usually round, plate with a hole in the middle that is normally used to distribute the load of a threaded fastener. USS flat washers have a large, wider body. SAE flat washers are machined to a tighter specification and have a smaller outside diameter.
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