Technical requirements according to ISO 4162 standard
The international standard ISO 4162 regulates the geometric parameters and physico-mechanical properties of bolts equipped with a reduced hexagon head with an integrated flange. The primary scope of application for these fasteners is high-load assemblies where reliable clamping and pressure distribution on the bearing surface are required. The products are manufactured according to accuracy class A, while the drive (head geometry for the wrench) corresponds to accuracy class B.
The technical specification applies to bolts in the range of nominal thread diameters from M5 to M16 inclusive. The standard provides for the use of various strength classes, including high-strength versions 8.8, 9.8, 10.9, as well as corrosion-resistant options made of A2-70 stainless steel.
Engineering recommendations and compliance standards
When designing assemblies that require deviations from standard ISO 4162 parameters, EV Group China engineers recommend relying on the current international standardization database. To clarify the parameters of threaded connections and the mechanical properties of fasteners, the following regulatory documents should be used:
- ISO 261 — General purpose metric screw threads;
- ISO 888 — Bolts, screws and studs — Nominal lengths;
- ISO 898-1 — Mechanical properties of fasteners made of carbon steel and alloy steel;
- ISO 965-2 — Tolerances for general purpose metric screw threads;
- ISO 3506-1 — Mechanical properties of corrosion-resistant stainless steel fasteners.
EV Group China provides supplies of high-quality fasteners that fully comply with the stated standards, guaranteeing the stability of geometric parameters and compliance with specified strength classes for critical metal structures.