Historical
ISO 9975:1990
Round non-alloy steel wires for locked coil mine winding ropes - Specifications
Specifies: a) the dimensional tolerances; b) the mechanical characteristics; c) the conditions with which coatings, if any, shall comply; d) the conditions of sampling and control. Applies to round, bright or zinc-coated wires of nominal diameters between 1 mm and 3,5 mm.
International Organization for Standardization [iso]