This Part of GB/T 13576 specifies the tolerances and markings for serrated threads. The profile, diameter and pitch series of zigzag threads comply with the provisions of GB/T 13576.1 and GB/T 13576.2 respectively. This section applies to general purpose mechanical transmission and serrated thread connections.
GB/T 13576.4-2008 Referenced Document
GB/T 13576.1 Buttress threads with the flank angles of 3 and 30 degrees.Part 1:Profiles
GB/T 13576.2 Buttress threads with the flank angles of 3 and 30 degrees.Part 2:General plan