1966 small block fan shrould mounting bolts head markings. - NCRS Discussion Boards

1966 small block fan shrould mounting bolts head markings.

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  • Matthew L.
    Very Frequent User
    • August 29, 2010
    • 187
    #1

    1966 small block fan shrould mounting bolts head markings.

    What are the correct style/head markings for all the fan shroud mounting bolts for a 1966 327 corvette non AC car. Thanks
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    • Gene M.
      Extremely Frequent Poster
      • March 31, 1985
      • 4232
      #2
      Re: 1966 small block fan shrould mounting bolts head markings.

      Typical found 5/16" bolt head mark WB.
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        • Bill W.
          Very Frequent User
          • October 31, 1977
          • 402
          #3
          Re: 1966 small block fan shrould mounting bolts head markings.

          Gene, That's what is in my 23514 AOS car. Finish is black oxide. Bill
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            • Gene M.
              Extremely Frequent Poster
              • March 31, 1985
              • 4232
              #4
              Re: 1966 small block fan shrould mounting bolts head markings.

              Originally posted by Bill Wilhelm (1600)
              Gene, That's what is in my 23514 AOS car. Finish is black oxide. Bill
              Yes, that is very typical regardless if AO Smith or St Louis. The shroud is a final line assembled part in St Louis.

              But I recall the 5/16" bolt finish was zinc.
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