This is a brass nut with a special anti-backlash feature that can improve the accuracy and stability of your linear motion. The nut has a spring-loaded design that allows you to adjust the tension and eliminate the gap between the nut and the screw. This can reduce the backlash, which is the amount of slop or movement when the screw changes direction. The nut has a pitch of 2mm and a lead of 8mm, which means it moves 8mm for every rotation of the screw. The nut is compatible with 8mm acme threaded rod lead screws, which are commonly used for CNC and 3D printer projects. The nut can be mounted on plates or V-slot using M5 screws and nuts or tee nuts. The nut is made of brass, which is a durable and self-lubricating material. The nut is suitable for T8 lead screws with a diameter of 8mm and a length of up to 400mm. This nut is a great choice for any project that requires smooth and precise linear motion.