DIN 980 is a type of locking nut that is designed to prevent loosening due to dynamic forces. This is achieved through the use of a non-metallic insert made from materials such as nylon. The insert applies a prevailing torque to the nut, which helps to maintain tension in the bolted joint and prevent the nut from coming loose.
The DIN 980 standard specifies the requirements for hexagon nuts with non-metallic inserts, including dimensions, tolerances, material properties, heat treatment, and testing methods. The standard ensures that these nuts meet certain quality and performance standards, including resistance to loosening due to dynamic forces.
Uses of DIN 980
- Automotive engines: DIN 980 nuts are commonly used in the assembly of automotive engines, such as in connecting rod bolts, cylinder head bolts, and other critical components. These nuts help to prevent loosening of fasteners due to engine vibration and other dynamic forces, which can cause engine failure or damage.
- Aerospace applications: DIN 980 nuts are used in a range of aerospace applications, such as in aircraft engines, landing gear, and other critical components. These nuts help to prevent loosening of fasteners due to the extreme vibrations and stresses experienced during flight, which can have catastrophic consequences.
- Heavy machinery: DIN 980 nuts are used in heavy machinery and equipment applications, such as in mining equipment, construction machinery, and other heavy-duty applications. These nuts help to prevent loosening of fasteners due to the high levels of vibration and shock that are common in these applications, which can cause damage to the equipment and create safety hazards for workers.
Overall, DIN 980 nuts are an important component in many applications where safety, reliability, and durability 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 980
- 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)
- 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)
- Non-ferrous metals:
- Brass (ASTM B16 Gr. C36000)
- Bronze (ASTM B98 Gr. C95500)
It's important to note that the specific material used for a particular DIN 980 locking nut can depend on the application and the desired properties of the nut, such as strength, corrosion resistance, and temperature resistance. The selection of the correct material and grade is important to ensure the proper functionality and performance of the fastener. It's recommended to consult the manufacturer's documentation or markings on the nut to determine the specific material and grade used.
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