GB/T 3098.13-1996 Mechanical properties of fasteners--Torsional test and minimum torques for bolts and screws with nominal diameters 1mm to 10mm (English Version)
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
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GB/T 3098.13-1996
Scope
This standard specifies the torque test and breaking torque value of bolts and screws with a nominal diameter of 1 to 10 mm and a property grade of 8.8 to 12.9 (GB3098.1). This standard is applicable to bolts and screws whose thread size is smaller than M3, and whose minimum tensile load and proof load are not specified in GB3098.1; and bolts and screws whose nominal diameter is 3-10mm, but whose length is too short to carry out tensile test. The breaking torque does not apply to hexagon socket set screws.
GB/T 3098.13-1996 history
1996GB/T 3098.13-1996 Mechanical properties of fasteners--Torsional test and minimum torques for bolts and screws with nominal diameters 1mm to 10mm