Lead Screw Extra ANTI BACKLASH Nut 8mm

From the shop's description

Specification: Material: Brass nut Screw diameter: 8mm Screw spacing: 2mm Lead of thread: 8mm Range: Reprap Makerbot 3d printer accessories or others Anti Backlash lead screw nut for TR8x8 metric lead screws. The nut consists of 2 pieces with a preloaded spring between them to get rid of backlash during movent. How does the anti-backlash mechanism work? The assembly consists of a main nut body and a secondary ring. There is a spring in-between the two which forces each part against opposing flanks of the screw thread, effectively creating a bias that takes up any backlash during movement.