Thread pitch is the distance between the same point on adjacent threads of a screw and can be referred to as TPI or threads per inch. A pitch gauge can be used to check thread pitch giving you an approximate measurement based on already determined thread standards. For a precise measurement you will need to use a caliper to measure the distance between the crests of two threads.
You can also calculate thread pitch by measuring the entire length of the thread of a screw and counting the total number of threads. You can then divide the thread length by total number of threads to calculate the thread pitch.
TP = L / n
| TP = Thread Pitch |
| L = Length |
| n = Number of threads |
TPI = n / L
| TPI = Threads per inch |
| n = Number of threads |
| L = Length of thread |
