Acme threads are broad heavy screw threads that feature a nearly square appearance with a flat top and a 14.5 degree flank angle, which equals a 29 degree included angle when measured from between two threads. Acme threads are used for producing traversing motions on machines, tools, and for heavy load work. Acme thread rods and nuts are well suited for quick assembly and disassembly as they have a much greater travel distance (screw lead) per turn (revolution) than standard threaded rods and nuts.
Common industrial applications for Acme threaded fasteners include lead screws, jack screws, CNC systems and many other applications. Also used in industrial applications requiring heavy torque and power transmission such as lathes, milling machines and presses. Acme threads are broader, stronger, and squarer than standard V-shaped threads.
Due to their heavy thick design Acme rods and the mating hex nuts have much better wear properties, load capabilities, and tolerances, than standard threaded rod and nuts. Since the threads are thicker and wider, they operate more easily in environments with dirt and debris.