This standard specifies the mechanical properties of fastening screws with a nominal thread diameter of 1.6-24MM and similar fasteners without tensile stress, which are made of carbon steel or alloy steel and tested at an ambient temperature of 10-35°C. . Products judged to comply with this standard under ambient temperature conditions may have different mechanical and physical properties at higher or lower temperatures. Users should pay attention. This standard is not applicable to fastening screws with special performance requirements, such as : Specifies the performance requirements of tensile stress, weldability, corrosion resistance, working temperature higher than +300 or lower than -50
GB/T 3098.3-2000 history
2016GB/T 3098.3-2016 Mechanical properties of fasteners.Set screws
2000GB/T 3098.3-2000 Mechanical properties of fasteners-Set screws