30/120

50/120

40/120

40/150

4 times

5 times

6 times

3 times

To measure the minor diameter of external thread

To measure the minor diameter of internal thread

To measure the major diameter of external thread

To measure the major diameter of internal thread

By vernier caliper

By screw thread micrometer

By three wire method

Using slip gauge pack

Measure major diameter

Measure minor diameter

Measure effective diameter

Measure the pitch of the thread