High Hexagon Nuts EN ISO 4033 (Type 2) from EV Group China

Technical Overview of the EN ISO 4033 Standard

The international specification EN ISO 4033 regulates the geometric parameters and technical requirements for high hexagon nuts (type 2) with metric threads ranging from M5 to M36. The products are classified by manufacturing precision:

• Class A: for fasteners with a nominal thread diameter d ≤ M16.
• Class B: for fasteners with a nominal thread diameter d > M16.

When designing assemblies that require specific performance characteristics differing from the basic parameters of this standard, engineers should refer to relevant international norms: ISO 724, ISO 898-2, ISO 965-1, and ISO 4759-1. To select standard nuts with regular height (type 1), the ISO 4032 specification must be used.

Manufacturing Standards and Supply Requirements

High nuts of type 2 from EV Group China are manufactured from structural and alloy steel grades in strict accordance with quality protocols:

The primary document defining general requirements for fasteners is the ISO 8992 standard. Key product characteristics include:

• Thread tolerance: accuracy class 6H (according to ISO 724 and ISO 965-1).
• Property classes: 8, 9, 10, 12 (according to ISO 898-2), which ensures high load-bearing capacity in critical joints.

Surface corrosion protection and finishing requirements are determined based on the coating method:

Permissible deviations and surface defects are strictly limited by ISO 6157-2 standards. Quality control and acceptance testing of products supplied by EV Group China are carried out according to ISO 3269 protocols, ensuring the reliability of hardware products under maximum load conditions.