ISO 4033 Hexagon High Nut

Hexagon high nut ISO 4033 belongs, by precision grade, to product grades A (for threads with diameter less than or equal to M16) and B (for threads above M16). High-strength steel grades are used in its manufacture, so the finished products have a property class of 8 and above. Fasteners are sold with zinc coating as corrosion protection, or without it.

Dimensional parameters and designations

The marking of the hexagon high nut is fairly simple to decode. For example, the designation GOST ISO 4033-M16-10 indicates a standard nut with M16 thread and property class 10. The standard regulates the following nut dimensions:

• metric thread from M5 to M36;
• fastener height from 5.1 mm to 34.7 mm;
• width across flats of the hexagon from 8.0 mm to 55.0 mm;
• maximum distance across the corners of the hexagon from 8.79 mm to 60.79 mm.

Due to the increased height, this fastener has more thread turns engaged compared to standard nuts of the ISO 4033 type. This reduces the risk of thread stripping and makes bolted connections more reliable.

Application

Thanks to their high strength, hexagon high nuts are used in assemblies subject to heavy loads. They are used together with high-strength bolts, studs and screws. Main application areas include heavy and light machine building, automotive, aircraft, river and marine vessel construction, various branches of construction production, and other fields.