Trapezoidal (Tr) thread is defined in ISO:2901/2/4, as well as a variety of national standards throughout the world. Similar to acme threads, trapezoidal threads are commonly used for leadscrews in machine tool drive systems where high accuracy and high load capacity are required.

Applications of trapezoidal threads include universal testing machines, jacks, conveyors, valve stems, and steering mechanisms.

REMPCO has the capability to produce trapezoidal thread according to any standard and typically at a fraction of specified tolerances.