Scope and technical purpose of ISO 7414
This standard specifies the dimensions of hexagon nuts, style 1, with an increased width across flats, corresponding to product grade B. The technical requirements apply to products with a metric thread ranging from M12 to M36, intended for high-strength bolted connections of property class 10.9. The EV Group China engineering department emphasizes that this product is designed to ensure the reliability of assemblies operating under high static and dynamic loads.
In cases where project documentation requires a deviation from established parameters, EV Group China recommends performing calculations based on current ISO standards, including ISO 261, ISO 898-1, and ISO 965, to ensure the compatibility of fasteners.
EV Group China technologists draw attention to installation features: when using ISO 7414 nuts paired with ISO 7412 bolts, there is a risk of thread stripping if the permissible tightening torque is exceeded. This effect is most pronounced for hot-dip galvanized products, which requires strict control of the applied torque during the assembly of metal structures.