Mechanical properties of fasteners -- Part 2: Nuts with specified proof load values -- Coarse thread
Это стандарт пересмотрен ISO 898-2:2012
Applies to nuts with nominal thread diameters up to and including 39 mm, specific mechanical requirements, widths across flats as specified in ISO 272, nominal heights greater than or equal to half the nominal diameter of the internal thread, made of carbon steel or low alloy steel. Does not apply to nuts requiring special properties (such as weldability, corrosion resistance, etc.). Values apply when tests are made at room temperature.