An example with our forever growing stock list, is our latest addition, metric fine fasteners. The specialised world of metric fine threads offer advantages in applications where accuracy and reliability are vital.
What Are Metric Fine Threads?
Metric fine threads are a subset of metric threads, characterized by a smaller pitch compared to standard (coarse) metric threads. The pitch is the distance between the two adjacent threads. In fine threads, this distance is reduced resulting in more threads per inch. For instance, while a standard M10 course thread has a pitch of 1.5mm, a fine-threaded M10 might have a pitch of 1.25mm or even finer.
The Advantages of Metric Fine Threads
- Better Adjustment and Precision: The finer pitch allows for more precise adjustments, making these threads ideal for applications where minute adjustments are critically used, such as in calibration instruments and micrometers.
- Increased Resistance to Loosening: The increased surface area in contact provides a greater resistance to loosening under dynamic loads. This makes fine threads particularly useful in environments with constant vibrations, such as automotive or aerospace applications.
- Improved Seal Quality: Fine threads can create better seals, as the smaller pitch allows for a more gradual engagement, which can compress sealing materials more effectively. This is especially important in fluid systems where leakage must be minimized as harmful chemicals may be used.
Applications of Metric Fine Threads
Metric fine threads are not just for niche applications; they are used across a wide range of industries:
- Aerospace: The demand for precision and reliability in aircraft components often endeavors the use of fine threads, particularly in areas where space is limited, and weight reduction is critical.
- Automotive: In vehicles, where components are subject to constant vibrations, fine threads help maintain integrity and prevent fasteners from loosening. Commonly used on car wheels or suspension parts.
- Medical Devices: The need for precision and reliability in medical devices is paramount. Fine threads are used in surgical instruments and other medical equipment to ensure secure and precise adjustments.
- Machinery and Tooling: Fine threads are essential in precision tooling and machinery, where they allow for exact positioning and adjustment of components.
For more information, prices and availability, give us a call or email 0151355 8045 sales@leytonfasteners.co.uk


