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This product is a screwed PN16 2 1/2 inch flange used to seal pipeline ends or connections. Bolts are not included and must be purchased separately. The flange has a pressure rating and conforms to BS4504 Table 16. DN65 with a diameter of 185mm, thickness of 18mm, PCD of 145mm, and four M16X65 holes. Flanges are covered in a primer finished black paint, which may chip or flake off during transportation but will not affect quality. Normally, the flange will be painted with red oxide for rust protection when installed on pipework with a pump or valve.. JTM PN16 Screwed Flange - 2 1/2 inch Mild Steel FL-086-E