Metric Bolts
Metric bolts are bolts that are measured using the metric system. They are essential for any product that must be compatible with parts from other countries such as Europe or Asia and are increasingly used in industry in the United States. The metric system may also be known as the International System or SI (from the French, Systeme International d'Unites).
Sets of metric bolts, nuts, and screws may be a good way to keep metric-sized fasteners on hand. Metric bolts can also be purchased individually or according to a specific design and size requirement.
Metric fasteners are indicated by the letter M followed by the fastener diameter in millimeters, for example, M5 for a bolt that is five millimeters in diameter.