Universal Clamp for 48mm Tube. Shaped to Captivate a Bolt Head or Nut. 200Kg Safe Working LoadSWL: 200kg. Universal clamp for the fixing of standard 48mm lighting bar. A channel retains the M12 nut or bolt head- so stops the bolt or nut spinning while the clamp is being fitted. The camp is available with either a zinc or black finish and is exceptionally robust. Use these clamps for suspending lighting bars or tube grids. Threaded stud can easily be fitted to the clamp- making it easy to suspend bars from roof joists or beams.