This standard stipulates that the tooth type conforms to GB 192, the diameter and pitch series conform to the specifications on the upper left of the thick black line in the GB 193 table, and the tolerance conforms to the limit dimensions of ordinary threads in GB 197. This standard applies to commonly used ordinary threads with a nominal diameter of 1 to 300 mm and a tolerance zone of 4H, 5H, 6H, 7H, 4h, 5h, 6h, 6h, 6g, 6f, 6e, 8h or 8g.
GB/T 15756-1995 history
2008GB/T 15756-2008 General purpose metric screw threads.Limits of sizes
1995GB/T 15756-1995 Limits of size for general purpose screw threads