This standard specifies the series of zigzag thread diameters and pitches with a nominal diameter of 10 to 640mm and a profile conforming to GB/T13576.1. This standard applies to serrated threads for general purposes.
GB/T 13576.2-1992 history
2008GB/T 13576.2-2008 Buttress threads with the flank angles of 3 and 30 degrees.Part 2:General plan
1992GB/T 13576.2-1992 Burrress threads with 3 and 30 degress flank angle-General plan