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 bright zinc plated (BZP) for a shiny finish, providing some protection, although it is best suited for indoor use. Technical specifications Thread Size: M20 Thread Length: 65 mm Inside Diameter: 200 mm Inside Height: 240 mm Leg Centers: 220 mm Leg Length: 140 mm Material: Zinc Plated (ZP) Pipe Nominal Bore: 175 mm Suggested Pipe OD: 193.7 mm Manufacturing Tolerances: +/- 1 mm Other information Includes two nuts per leg Conforms to British Standard 3974 PART 1: 1974 Fig 10