While there is no precise correlation between SAE fractional and metric measurements, there are many sockets that are close enough in size to be used interchangeably, in some circumstances.

Whereas SAE is quite common in the United States, metric is the most common measurement type throughout the rest of the world. Though there are various reasons for this, it tends to be more accurate than using fractional increments on an inch.

For standard bolts, head size is measured in inches or fractions of inches; however, metric bolt head sizes are measured in millimeters, which can cause confusion if engineers attempt to apply metric bolts to standard systems, and vice versa.

Tool measurements are either “Metric” or “Standard.” The latter refers to SAE tools. SAE tools are measured in 1/1000 of an inch. Metric tools are measured by the metric system. The “mm” listed on metric tools refers to millimeters.

American cars are assembled with nuts and bolts that use standard measurements while foreign cars almost exclusively use metric measurements.

There are two different methods for measuring the hex sizes of sockets. The SAE (Society of Automotive Engineers) system uses inches, and the imperial or metric system uses millimeters.

Metric and SAE fasteners are measured differently and with different vocabulary. SAE nuts, bolts and screws are measured by their thread count, or TPI (threads per inch) and their length. Metric fasteners are measured by length and pitch, or the distance between threads.

Metric is simply a better system of units than imperial The metric system is a consistent and coherent system of units. In other words, it fits together very well and calculations are easy because it is decimal. This is a big advantage for use in the home, education, industry and science.

Is the metric system more accurate? Both systems are as accurate but the metric is more handsome. Example, reading a size in mm is far easier than the same in fractions of an inch. So far that for complicated calculations, US engineers tend to convert to metric, do the calculation and then convert to customary again.

Why do American cars use metric bolts? Most new American cars use exclusively metric fasteners. This is due to the increasing penetration of American cars in foreign markets, the increasing acceptance of metric fasteners by engineers, and the large quantity of components sourced overseas.

The SAE (Society of Automotive Engineers) system uses inches, and the imperial or metric system uses millimeters. At the hardware store, you may find yourself asking: “Why doesn’t this socket fit this nut?

SAE socket sizes: 11/16 in. – 5/32 in. 8 point 1/4 in. drive socket sizes: 1/4 in., 5/16 in., 3/8 in.

Style:SAE Size 8 Range 1/2″ to 13/16″ | Size:SAE Size 8 Range 1/2″ to 13/16″, 10-Pack. Pro Tie mini worm drive hose clamps are precision made from stainless steel to provide dependable and long lasting use. The 5/16-Inch wide band provides an excellent seal with a variety of hose materials and yet is small enough to fit into tight places.

The difference between metric tools and standard tools is slight for some applications while in other instances the difference may make a job harder. For example, a tool designed using the standard system may be ineffective against a bolt that is designed using the metric system.