Making the switch to metric fasteners isn't always straightforward. These fasteners use different sizing systems from the ones you currently use. Read on to learn the basics.
1. Metric Fasteners Use Millimeter Measurements
If you currently use regular imperial fasteners, then their measurements are in inches. If you switch to using metric fasteners, then you will have to learn to work in millimeters.
The metric system doesn't use inches. You might end up buying fasteners of the same size when you make this switch; however, you will have to convert your current measurements to millimeters to make orders.
2. Metric Fastener Diameters Aren't Always Precise
When you buy metric fasteners, you have to choose a diameter size. For example, if you're buying bolts, then the diameter size tells you the size of the hole the shaft of the bolt will fit.
However, the actual size of the bolt might be slightly under its listed millimeter size. For example, a 10mm bolt might actually have a diameter that is a tiny bit smaller than 10mm. This size differential ensures that the bolt will slot into its space smoothly and evenly.
3. Metric Fasteners Have Different Pitch Measurements
Most metric fasteners have a pitch measurement. This measurement tells you the distance between each thread on the fastener.
Fasteners have either coarse or fine pitches. A coarse-pitched fastener has a smaller gap between threads; finer pitches have bigger gaps. If a fastener doesn't have a specified pitch, then it is usually a coarse design.
This distance affects the ability of a fastener to do its job in a given situation. For example, if you need to install fasteners fast on a production line, then coarser threads are more efficient. However, if you need a fastener with a more secure hold, then a finer thread might be a better option.
Some of the fasteners you use right now might also give you pitch measurements. These measurements don't work the same as the metric system. They usually cover threads per inch rather than the gap sizes between threads.
4. Metric Fastener Lengths Work the Same Way
You typically measure the length of a metric fastener in the same way you measure your current fasteners. You simply work in millimeters rather than inches. The length of a fitting goes from its head to its tip. If you have a dome head, then you measure from its highest point.
If you aren't sure which new fasteners to buy, then talk to metric fastener suppliers. They can help you choose metric products which will meet your fastening needs.
Share3 January 2023
I have always been someone who loves to know more about the way the world works, which is part of the reason I started reading about industrial and manufacturing processes. I have always found it fascinating that professionals can create things by hand, and so I started attending factory tours, asking questions, and doing as much research as possible. It was really interesting to see how much of a difference my efforts made, and before I knew it, I was able to completely change the way I thought about manufacturing. This blog is here to help other people to appreciate the majesty of industry. Check it out!
