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Bolts are not included and must be purchased separately. This flange is used to seal the ends of pipelines or any connections securely. It is designated as 113NP6 and complies with BS4504 Table 6 standards. Available sizes vary from DN15 with an 80mm diameter and 12mm thickness, to DN200 with a 320mm diameter and 22mm thickness. The number of holes and their specifications also differ by size, ensuring a perfect fit for various requirements. The flanges are coated with a primer finished black paint that may chip or flake during transport, but this does not impact the quality. When installed onto pipework with a pump or valve, they are typically painted with red oxide to prevent rust. Choose the correct diameter, thickness, and hole configuration for a secure and efficient seal. Ensure you have the appropriate bolts for the specific size you need. The professional-quality material ensures durability and reliability in various applications.. JTM PN6 Screwed Flange Black - 2 inch Steel FL-065-D