Spring tension anti-backlash nut
Lead screw NUT Tr8*2, Tr8*4, Tr8*8 or Tr8*12
Made of Brass, work together with tension spring
TR8x2: 2mm pitch, 1 start, 2mm of linear movement per rotation.
TR8x4: 2mm pitch, 2 starts, 4mm of linear movement per revolution.
TR8x8: 2mm pitch, 4 starts, 8mm of linear movement per rotation.