DIN 7970 Threads and Threads for Lead Screws - ISO 1478 Lead Thread

DIN 7970 Threads and Threads for Lead Screws - ISO 1478 Lead Thread

DIN 7970 published by the German Standardization Institute (DIN) The standard defines the dimensions and requirements for threads and thread ends for lead screws, and describes test methods.

DIN 7970 Threads and Threads for Lead Screws - ISO 1478 Lead Thread

Similarly, the ISO 1478 standard published by the International Standards Organization (ISO) defines threads and thread ends for lead screws (sheet metal screws) with thread sizes from ST1,5 to ST9,5 (ISO 1478 Lead screw thread). Essentially, the DIN 7970 standard is a modified version of the ISO 1478 standard.

In the DIN 7970 standard, the requirements for thread and thread ends of lead screws are listed under the following headings:

  • Mechanical properties of stainless steel for thread and thread ends of lead screws
  • Chemical composition of stainless steel for thread and thread ends of lead screws
  • Mechanical properties of steel for thread and thread ends of lead screws
  • Chemical composition of steel for thread and thread ends of lead screws

Pointed self-tapping screws do not require a pilot hole. The act of inserting the screw results in the self-tapping screw cutting a thread into the material and fastening the materials together. Self-tapping screws are typically used to fasten wood, plastic, metal and brick together. In general, there are two types of self-tapping screws: thread-forming and thread-tapping. Before using thread forming screws, a pilot hole is required to be drilled as the screw itself does not contain a pointed tip. Thread-forming screws are often used to join plastic materials. These screws usually grip the material more tightly due to their design. Over-tightening the screw is risky.

Threading screws do not require a pilot hole, but a hole can be drilled to facilitate fastening. The pilot hole must be smaller than the diameter of the tapping screw. Threading screws remove material and create a path for the screw.

Our organization, among the numerous test, measurement, analysis and evaluation studies it has given for businesses in various sectors, with its trained and expert staff and advanced technological equipment, within the scope of DIN 7970 standard, for threads and thread ends for lead screws and within the scope of ISO 1478 standard, lead screw It also provides testing services for females.

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