Openbuilds Nut Block ACME Nut Block For 8mm Lead Screw $ 4.71 This 8mm Acme Nut Block is a great choice for many projects requiring lead screw linear motion. It serves more than one purpose in that it can be mounted to the bottom of a 3mm/1/8'' plate utilizing M5 nylon insert nuts and 15mm M5 low profile screws or can also be mounted directly to V-slot utilizing two channels with 15mm M5 low profile screws and two tee nuts.These mounting choices allow for a host of modular machine applications.You can mount this block along any length of V-Slot to create your linear motion.