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SAE MA 1518C-2019

Bolts, Screws, and Nuts - External Wrenching, Metric Threads - Design Parameters for

To fully define the following requirements for bolts with spline and hexagon heads of strength class up to, but not including, 1250 MPa: a. Head dimensions (see 3.1) b. Shank dimensions (see 3.2) c. Geometric control (see 3.3) d. Surface texture (see 3.4) This document is based on one class of thread after all processing, including coating or plating, has been completed as follows: tolerance class 4h6h. For particulars of thread, see AS1370. For thread runout and lead threads, see AS3062.

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