HOW TO DETERMINE THE THREAD TYPE USING CALLIPERS
Thread can measure with a caliper, the outside diameter of the thread of a male or the inside diameter of the thread of a female you will get a measure in mm. By finding this value in mm on the below table, you’ll be able to find the relevant thread type.
DESIGN THREAD
The type of thread can be identified by the following characteristics.
PITCH
he pitch is the distance from the crest of one thread to the next in mm.
TPI (Threads per inch) is used by inch thread
DIAMETER
The major diameter is determined by the thread tips.
The minor diameter is determined by the groove of the thread.
The pitch diameter is the distance of two opposite flanks or the distance of the centerline of the profile.
ANGLE
The flank angle is the angle between the flank of a screw thread and the perpendicular to the axis of the screw. Tapered threads have a taper angle. This is the angle between the taper and the center axis of the pipe
