Trapezoidal rod, material class C15 (W.Nr. 1.0401, AISI 1015, ČSN 12020). A rod with a trapezoidal thread finds application in the field of movement screws. The thread is rolled with an isosceles trapezoid profile, dimensions according to DIN 103 (ISO 2901/2903, ČSN 01 4050). The designation L stands for left-hand thread. Thread tolerance 7e.7e.