标准号:IS 4694-1968
发布日期:1968/9/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围: This standard covers the basic profile and dimensions for square threads in three series in the diameter range 10 to 640 mm as indicated below:Fine series 10 to 640 mmNormal series 22 to 300 mmCoarse series22 to 400 mm