General description U-Bolt M20 x65mm Thread, designed for applications where longitudinal movement is necessary, such as allowing for vibration or thermal expansion. This non-gripped type U-bolt is made from steel with a bright zinc plating for a shiny finish, making it suitable for indoor use. Technical specifications Thread Size: M20 Thread Length: 65 mm Inside Diameter: 255 mm Inside Height: 290 mm Leg Centers: 275 mm Leg Length: 163 mm Material: ZP (Zinc Plated) Pipe Nominal Bore: 225 mm Suggested Pipe OD: 244.5 mm Manufacturing Tolerances: +/- 1 mm Other information Includes two nuts per leg Conforms to British Standard 3974 PART 1: 1974 Fig 10 3 micron plating applied for protection