UNC 1/4" 5/16" 3/8" 1/2" Hex Serrated Flanged Nut Flange Nuts A2 Stainless Steel. Type: Hex Serrated Flanged Nut. Material: A2 304 Stainless Steel. Thread: UNC. - Due to shooting angle, light， display and other reasons, the colors displayed in the picture may be slightly different from the actual product.
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