Penn Stainless stocks Flat & Expanded sheet in 304, 304/L and 316/L in multiple gauges and pattern sizes. We can also produce Flat & Expanded Stainless from our large inventory of stainless sheet, including grades 309, 310, 321, 347 . In 400 series stainless we can supply Flat & Expanded metals in 409, 410 and 430. Penn Stainless will process your Flat & Expanded order. Need 6 pieces of ¼-18 cut to 12” square or something similar? No problem. Please review of full catalog for standard items. If you do not see your requirement please contact a sales associate.