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 Historical

SAE MA 1549-1980 (SAE MA1549-1980)

Wrenching Configuration, 12 Spline, for Metric Threaded Fasteners ( Reaffirmed: Jul 1991 May 1995 Nov 2001 Oct 2006 )

This is a design standard not to be used as a part number.


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Society of Automotive Engineers [sae]


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