13 D18 Street, Hung Phu Residential Area, Phuoc Long B Ward, Thu Duc City, Ho Chi Minh City
- Among thread measuring tools, thread gauge is the most popular tool.
- The tolerance level of the thread to be checked and the tolerance of the thread gauge are the same
- The size tolerance of the threaded hole has an upper limit and a lower limit, so the thread inspection gauge remains called a thread limit measuring device.
- Thread gauge has 2 ends GO and NO GO. Ren is considered satisfactory when the first GO goes and NO GO does not go when turning no more than 2 revolutions .
- Thread gauges are manufactured according to some common standards such as JIS standards (I, II and III, etc.), ISO standards (6g, 6H, etc.).
- JIS standard internal thread gauge symbol
WP: Head NO GO
IP: Head NO GO
GP: GO head
- ISO standard internal thread hole gauge symbol
NP: Head NO GO
GP: GO head used incorrectly 6H
GR: GO tip tolerance 6g