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ISO 4033 is an international standard that specifies the requirements for hexagonal nuts. This standard defines the exact dimensions, shapes, materials, and other characteristics that nuts must meet to ensure their interchangeability and reliability in various connections.
Technical characteristics of ISO 4033
- Dimensions: The standard provides detailed descriptions of the nominal diameter, height of the nut, thread pitch, and other critical dimensions.
- Manufacturing accuracy: Tolerances from the nominal dimensions are specified to ensure the correct functioning of the nut in the connection.
- Materials: ISO 4033 specifies the main materials used for manufacturing nuts, such as carbon steel, stainless steel, and other alloy steels.
- Strength grades: The standard classifies nuts according to their strength, which is determined by the yield strength of the material. The most common strength grades are: 8.8, 10.9, 12.9.
- Coatings: To protect against corrosion and improve appearance, nuts can have various types of coatings, such as zinc plating, cadmium plating, or passivation.
Strength grade of ISO 4033
The strength grade of a nut indicates its ability to withstand a load without deformation. For example, a grade 8.8 nut has a higher strength than a grade 5.6 nut.
Fastener group
ISO 4033 nuts are usually part of a fastener group, which also includes bolts with corresponding threads. This ensures compatibility between nuts and bolts from different manufacturers.
Materials of manufacture
The main materials for manufacturing ISO 4033 nuts are carbon steel and stainless steel. The choice of material depends on the operating conditions of the connection (temperature, aggressive environment, etc.).
Application
ISO 4033 nuts are widely used in various industries:
- Mechanical engineering: for fastening machine parts and mechanisms.
- Construction: for connecting metal structures.
- Automotive industry: for fastening vehicle parts.
- Instrument making: for assembling precision instruments.
Advantages of using ISO 4033 nuts
- Reliability: They provide a strong and durable connection.
- Interchangeability: They can be used with bolts from different manufacturers.
- Wide range: Available in various sizes and strength grades.
- High quality: Manufactured using modern technologies.
