This SAE Standard covers material, dimensional, performance, and test requirements for metric thread rolling screws suitable for use in general engineering applications.
Rationale:
This SAE Standard has been revised. In this current revision, the significant changes from the previous 2017 revision include: reducing and limiting the maximum core hardness limit of Type 2 screws to 36 HRC; revising the hydrogen embrittlement testing requirements and methods (3.7.4 and 4.9) to reflect up-to-date understanding and practices related to hydrogen embrittlement; and revising the unthreaded underhead distance to establish more definitive measuring points and prevent rolling into the fillet radius.
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Related Topics:
Screws
Washers
Heat treatment
Tensile strength
Identification numbers
Also known as: SAE J 1237
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