This standard specifies the properties and corresponding test methods of case hardening steel tapping screws. The threads shall meet the requirements of GB/T 5280 and the thread sizes shall range between ST 2.2~ST 8.
2 Normative References
The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. At time of publication, the editions indicated were valid. All the standards will be revised, all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of the following standards are applicable.
GB/T 3098.5-2000 The following standards are cited：
