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Please note bolts are not included and must be purchased separately. This flange is typically used to seal the ends of a pipeline or any connection. It meets the BS4504 Table 6 standard. Sizes range from DN15 to DN200. The diameters and thicknesses vary to suit different needs, ensuring durability and fit. For example, DN15 has a diameter of 80mm and a thickness of 12mm, while DN200 measures 320mm in diameter and 22mm in thickness. The bolt hole configurations are designed for secure installations. Each flange is coated in a primer-finished black paint. Some chipping or flaking may occur during transportation but won't affect the product's quality. Once installed, these flanges are usually painted in red oxide to protect from rust, ensuring long-lasting performance. This makes them a reliable choice for various plumbing and industrial applications.. JTM PN6 Screwed Flange Black - 1 1/2 inch Steel FL-064-D