DIN 464 Knurled Screws, High Type

DIN 464 Knurled Screws, High Type

The DIN 464 standard, published by the German Institute for Standardization (DIN), describes the requirements for high-type knurled screws. Manufactured from stainless steel, these knurled screws are machined entirely from a single piece. The thread of the screw typically extends to the shoulder and terminates in a smooth projection. These screws are suitable for universal use and can be tightened and loosened quickly without the need for tools.

DIN 464 Knurled Screws, High Type

These knurled screws are generally produced in three types:

  • DIN 464: Steel grade 5.8 (tensile strength 500 N/mm2), turned and burnished
  • DIN 464-ZB: Steel grade 5.8 (tensile strength 500 N/mm2), turned and galvanized
  • DIN 464-NI: Stainless steel, sandblasted matte surface

The requirements for high-type knurled screws are included in the DIN 464 standard under the following headings:

  • Mechanical properties of stainless steel for high type knurled screws
  • Chemical composition of stainless steel for high type knurled screws
  • Mechanical properties of steel for high type knurled screws
  • Chemical composition of steel for high type knurled screws

Stainless steels are divided into three groups as austenitic, ferritic and martensitic. Austenitic steel is by far the most common type (more than 90 percent of commercial fasteners). Steel groups and strength classes are indicated with four-digit letters and numbers as shown in the table in the standard.

The use of austenitic group stainless steel is as follows:

  • Steel of strength class 50, A1, A2, is used for soft, cold worked, turned and soft pressed fasteners.
  • Steel of strength class 70, A2, A4, cold worked, is used for normal strength fasteners.
  • Strength class 80, A2, A4 steel, extreme cold worked, high strength, special applications.

Such screws are manufactured from high quality stainless steel and have superior rust resistance and excellent oxidation resistance. It provides long-term use even in bad environments. It is resistant to acid and alkali, and its high hardness prevents it from being deformed.

Among the numerous test, measurement, analysis and evaluation studies it provides for businesses in various sectors, our organization also provides testing services for knurled screws (high type) within the scope of DIN 464 standard, with its trained and expert staff and advanced technological equipment.

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