DIN 985

DIN 985 is a standard published by the Deutsches Institut für Normung (DIN) that specifies the requirements for prevailing torque type hexagon nuts with nylon insert. These nuts have a specific design that provides a locking feature which helps to prevent the nut from loosening due to vibrations and other dynamic forces. DIN 985 nuts are commonly used in applications where there is a risk of loosening due to dynamic forces, such as in automotive, aerospace, and industrial equipment applications. The use of specific materials and grades depends on the application and the desired properties of the nut, such as strength, durability, and resistance to corrosion.

Uses of DIN 985

DIN 985 nuts are used in a variety of applications where there is a risk of loosening due to dynamic forces. These nuts have a nylon insert that provides a locking feature, which helps to prevent the nut from loosening due to vibrations and other dynamic forces. Here are some specific examples of uses for DIN 985 nuts:

1. Automotive: DIN 985 nuts are commonly used in the automotive industry, including in engine assembly, suspension systems, and other critical components. These nuts help to prevent loosening due to vibrations and other dynamic forces, which can cause safety issues and reduce the lifespan of the vehicle.
2. Aerospace: In the aerospace industry, DIN 985 nuts are used in a range of applications, such as in aircraft engines, landing gear, and other critical components. These nuts are important for ensuring the safety and reliability of the aircraft, as loosening of fasteners can have catastrophic consequences.
3. Industrial equipment: DIN 985 nuts are used in a range of industrial equipment applications, such as in heavy machinery and other equipment that is subject to vibrations and other dynamic forces. These nuts help to prevent loosening of fasteners, which can cause damage to equipment and create safety hazards for workers.
4. Construction: DIN 985 nuts are also used in the construction industry, particularly in applications that require high-strength fasteners with a locking feature. These nuts are used in the assembly of structural components, such as in steel framing and concrete forms.

Overall, DIN 985 nuts are an important component in many applications where safety and reliability are critical factors. The use of specific materials and grades depends on the application and the desired properties of the nut, such as strength, durability, and resistance to corrosion. It's important to consult the manufacturer's documentation or markings on the nut to determine the specific material and grade used.

Materials for DIN 985

1. Steel:

• Low carbon steel (ASTM A563 Gr. A, C)
• Medium carbon steel (ASTM A194 Gr. 2H, 2HM, 7, 7M)
• Alloy steel (ASTM A194 Gr. 8, 8M, 8C, 8T)

2. Stainless steel:

• Austenitic stainless steels (ASTM F594 Gr. A, B, C, D, E, F, G, H, J)
• Austenitic stainless steels with improved corrosion resistance (ASTM F738M Gr. A1, A2, A4, B8, B8A, B8M, B8MA, B8T, B8TA, B8TX, B8MX)

3. Non-ferrous metals:

• Brass (ASTM B16 Gr. C36000)
• Bronze (ASTM B98 Gr. C95500)

4. Nylon:

• Polyamide 6 (PA6)
• Polyamide 66 (PA66)
• Other types of nylon such as Polyamide 11 (PA11) and Polyamide 12 (PA12) may also be used.

The selection of the plastic material depends on the application and the desired properties of the nut, such as temperature resistance, chemical resistance, and durability. The plastic insert provides the locking feature of the nut, and its properties affect the overall performance of the nut. It's important to consult the manufacturer's documentation or markings on the nut to determine the specific plastic material used.