If you are looking for the correct fitting sizes for your applications, there are many different metrics that you can use to consider, such as diameter and length. Another important but sometimes overlooked dimension is the thread pitch, which is a very important metric to look at when you are deciding on which sizes of a product to use. Here we will run through what a thread pitch is and why it is important.
Fig.1: Pitch on Full Nut & Threaded Stud
All of our stainless steel products with a shaft or in our nut collection will have a threaded pitch, whether it be a hexagonal bolt, a self-tapping screw, or a Nyloc nut. The thread pitch is important as it allows you to correctly attach the shaft of a bolt or screw to the required nut. If the pitches of the two fittings are different, you will not be able to attach them. The thread pitch is the distance between corresponding points on adjacent threads; this can be seen in Fig. 2.
Fig.2: Pitch dimension
| Nominal Diameter - D (mm) | Pitch - P (mm) |
| M1 | 0.25 |
| M2 | 0.4 |
| M3 | 0.5 |
| M4 | 0.7 |
| M5 | 0.8 |
| M6 | 1 |
| M7 | 1 |
| M8 | 1.25 |
| M10 | 1.5 |
| M12 | 1.75 |
| M14 | 2 |