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SAE AS 1338A-2014 (SAE AS1338A-2014)
Aerospace Metric 60° Screw Thread Profile and Tolerance Classes (Stabilized: Sep 2014)
This Aerospace Standard establishes the details of the maximum and minimum thread profile and tolerance classes for the metric 60° screw threads recommended for use in the aerospace industry for metric module bolts and nuts.
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Society of Automotive Engineers [sae]