This standard specifies the basic dimensions of zigzag threads whose tooth type conforms to GB/T13576.1, and whose diameter and pitch conform to GB/T13576.2. This standard applies to serrated threads for general purposes.
GB/T 13576.3-1992 history
2008GB/T 13576.3-2008 Buttress threads with the flank angles of 3 and 30 degrees.Part 3:Basic dimensions