Pitman arm nut and socket size - NCRS Discussion Boards

Pitman arm nut and socket size

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  • Joe L.
    Beyond Control Poster
    • February 1, 1988
    • 43193
    #16
    Re: Pitman arm nut and socket size

    Originally posted by David Bartush (3288)
    Part #s really help: 258779 & 5667628 are Saginaw Steering Gear Division numbers used by all GM Divisions. Listed in GRP. 6.861

    David------

    Since the two are apparently the same in configuration, I suspect that the difference is material grade with the 258779 being 280-M and the 5667628 being 300-M.
    In Appreciation of John Hinckley
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      • Gary B.
        Extremely Frequent Poster
        • February 1, 1997
        • 6979
        #17
        Re: Pitman arm nut and socket size

        Joe,

        So there are no visible markings (e.g., dots) or finish color differences between the grade 5 and grade 8 version of that nut?

        Gary
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          • Joe L.
            Beyond Control Poster
            • February 1, 1988
            • 43193
            #18
            Re: Pitman arm nut and socket size

            Originally posted by Gary Beaupre (28818)
            Joe,

            So there are no visible markings (e.g., dots) or finish color differences between the grade 5 and grade 8 version of that nut?

            Gary

            Gary------


            I don't know, for sure, if there was a material grade difference between the 2 nuts; I'm just postulating that. During the time period of the PRODUCTION change GM was converting other chassis fasteners from 280-M to 300-M. So, I'm just "extrapolating" on that.

            In any event, I can see no markings on either which might indicate material grade. Both appear to be "plain" finish.
            In Appreciation of John Hinckley
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