Sizes: M4x20x1.2mm Stainless Flat Washers. 110 Pieces M4x20x1.2mm Stainless Flat Washers. - Washer Type: Flat Washers, Plain Washers, Fender Washers. - Material: 304 Stainless Steel. 2, flat washers are well made, with smooth surface, which are mainly used to reduce pressure and friction, prevent leakage, isolate, loosening or disperse pressure.
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