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SAE AIR 1551A-2001 (SAE AIR1551A-2001)

Torque Tightening Metric Screw Threaded Fasteners ( Reaffirmed: May 2006 )

The purpose of this Aerospace Information Report (AIR) is to provide the aerospace propulsion industry with recommended assembly torque limits for threaded fasteners when a common torque value per fastener size is the objective. (The fasteners are based on the dimensional data in MA1518). It also provides a series of curves that show the effect of the coefficient of friction on the axial load produced in a fastener, when the recommended torques are applied.

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