What is the SAE thread

SAE (SOCIETY OF AUTOMOTIVE ENGINEERS), SAE 45° fittings with straight threads meet SAE J512 standard and are commonly used in refrigeration, automotive piping system and low pressure applications. SAE male has 45° flare which seals against 45° seat in female. Male can also seal against 45° flared tubing with nut and sleeve. The fittings are frequently made of brass, stainless steel and carbon steel.

What is the metric thread

Metric thread type is most common in Europe. It has a cylindrical inner and outer diameter precise in millimeters. The fine taper of metric tapered thread allows for the best possible force transmission. In writing, you can identify metric threads by a capital “M” plus an indication of their nominal outside diameter (ex. M22 x 1.5). Lastly, when measuring pitch size make sure you’re using a metric pitch gauge.

If you need more information of SAE and Metric, please feel free to contact us, QC Hydraulics are professional manufacturer for stainless steel adapter and hydraulic hose fittings with all kinds of thread.

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