What Does SAE Mean on Auto Tools?

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By Jonathan Spiegel
eHow Contributing Writer

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When you purchase auto tools, you may see the SAE designation printed on the package, or on the tools themselves. This abbreviation, which stands for the Society of Automotive Engineers, refers to standards that are adhered to by automotive manufacturers and related industries worldwide.

History

The SAE, or Society of Automotive Engineers, was originally known as the Society of Automobile Engineers, and was formed in the early 1900s in order to promote the use of standards in the automobile manufacturing industry.

Famous Ties

Henry Ford was the inaugural vice-president of the SAE.

Size

A nut measuring 9/16" across the flats
On auto tools, the SAE designation refers to the standard of measurement used. One of the simplest examples is the standard of measuring wrench sizes. Sizes are based on the width of the hex shaped nut or bolt that it can be used on, measured across the flat surfaces opposite each other.

Other Facts

You most commonly see the SAE designation on motor oil bottles, such as SAE 10W-40, which refers to the standard by which oil viscosity is measured. Even raw materials, such as steel, have SAE standards that refer to the chemical makeup and properties.

Significance

SAE standards are now universally applied to almost all aspects of ground transportation. In addition, the SAE now develops standards for the aircraft, aerospace and motorsports industries.