DescriptionKnurled nut for rear brake cable-M6 (used in Vespa  T5 125cc)For Threaded rear Brake CablesVESPA T5 REAR BRAKE CABLE. The Vespa T5 has a rear brake cable with a M6 thread, this is the adjuster knob (or Knurled nut, or adjusting nut) for this cable, it too has a M6 thread, and it can be use on most scooter cables with a M6 Thread.