1960 Tail Pipe Through-the-Bumper Insulator Screws - NCRS Discussion Boards

1960 Tail Pipe Through-the-Bumper Insulator Screws

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  • Joe M.
    Extremely Frequent Poster
    • April 30, 1990
    • 1338

    1960 Tail Pipe Through-the-Bumper Insulator Screws

    Can someone look up a screw with part number 156253. I would like to know if the original screws were countersunk phillips or slot. I would guess that all of them have been replaced by now and the screws in the bumper now are probably not original. Judges look for countersunk slot heads.
  • Gary C.
    Administrator
    • October 1, 1982
    • 17668

    #2
    Re: 1960 Tail Pipe Through-the-Bumper Insulator Screws

    Joe,

    P&A 24 March 1970 shows 156253 as a 1/4-20 x 3/4" long CAD/Zinc with CR (cross recess) head.

    Didn't find any earlier reference in P&A books.

    Gary
    ....
    NCRS Texas Chapter
    https://www.ncrstexas.org/

    https://www.facebook.com/profile.php?id=61565408483631

    Comment

    • Joe M.
      Extremely Frequent Poster
      • April 30, 1990
      • 1338

      #3
      Re: 1960 Tail Pipe Through-the-Bumper Insulator Screws

      That is enough evidence for me to conclude that cross head (phillips) are original. For flight judging, they have to be slot head. Thank you for the info Gary.

      Comment

      • Thomas H.
        Extremely Frequent Poster
        • August 31, 2005
        • 1058

        #4
        Re: 1960 Tail Pipe Through-the-Bumper Insulator Screws

        Joe,

        My car has phillips head screws. Upon closer inspection there also appears to be an external tooth style lockwasher under the screw head. I don't think these bumpers have ever been off the car but I can't say for sure.

        I'm going to a flight judging event tomorrow (as a spectator) and I'll scope out the C1's there. You have piqued my interest......

        TomPA201836.jpg

        edit: Just read judging manual, calls for slotted like you say. I suppose the insulators on my car could have been replaced at some point, but given the shape they are in, I thought they may have been the originals. I have a pile of old receipts for the car. Maybe one of the ones I could not identify the P/N on was for replacement exhaust insulators. Time to start digging...........
        1958, 283/245, White/red - Top Flight, October 2016
        1960, Black/black, 283/230 4sp
        1966, Black/Red, 327/350 4sp w/AC
        1967, 427/390, 4sp, Goodwood Green, Coupe
        1971 LS5, 4sp, coupe, Bridgehampton Blue
        2007 Z06, Lemans Blue

        Newsletter Editor, Delaware Valley Chapter

        Comment

        • Joe M.
          Extremely Frequent Poster
          • April 30, 1990
          • 1338

          #5
          Re: 1960 Tail Pipe Through-the-Bumper Insulator Screws

          1960 AIM doesn't show an external star washer and I wouldn't think it would be needed since there is lock washer on the other side.

          Comment

          • Thomas H.
            Extremely Frequent Poster
            • August 31, 2005
            • 1058

            #6
            Re: 1960 Tail Pipe Through-the-Bumper Insulator Screws

            Yeah Joe, I thought that was unusual when I saw it. I believe the exhaust was replaced in the early 70's and maybe the insulators were replaced then. I need to go through the receipts and see what I can find. Either way, the screws / insulators are most likely not the originals.

            Tom
            1958, 283/245, White/red - Top Flight, October 2016
            1960, Black/black, 283/230 4sp
            1966, Black/Red, 327/350 4sp w/AC
            1967, 427/390, 4sp, Goodwood Green, Coupe
            1971 LS5, 4sp, coupe, Bridgehampton Blue
            2007 Z06, Lemans Blue

            Newsletter Editor, Delaware Valley Chapter

            Comment

            • Thomas H.
              Extremely Frequent Poster
              • August 31, 2005
              • 1058

              #7
              Re: 1960 Tail Pipe Through-the-Bumper Insulator Screws

              Went to the judging event at County Corvette in West Chester PA today and there was only 1 58-60 car there (several other C1's though). It had the phillips screws. I did not get a chance to ask the owner how it judged.

              I believe they had over 40 cars there today. Nice turn out.

              Tom
              1958, 283/245, White/red - Top Flight, October 2016
              1960, Black/black, 283/230 4sp
              1966, Black/Red, 327/350 4sp w/AC
              1967, 427/390, 4sp, Goodwood Green, Coupe
              1971 LS5, 4sp, coupe, Bridgehampton Blue
              2007 Z06, Lemans Blue

              Newsletter Editor, Delaware Valley Chapter

              Comment

              • Tom B.
                Very Frequent User
                • March 1, 1978
                • 720

                #8
                Re: 1960 Tail Pipe Through-the-Bumper Insulator Screws

                Here's my original '59s. Never been apart with the original insulators still intact. I have owned this car well over 40 years. They are Phillips.

                Tom
                Attached Files

                Comment

                • Bill M.
                  Extremely Frequent Poster
                  • April 1, 1977
                  • 1386

                  #9
                  Re: 1960 Tail Pipe Through-the-Bumper Insulator Screws

                  Originally posted by Tom Bryant (1360)
                  Here's my original '59s. Never been apart with the original insulators still intact. I have owned this car well over 40 years. They are Phillips.

                  Tom
                  My '59 has phillips (cross-recess) too; mine is a one-family car and I disassembled the original insulators last winter (the cad plating is long gone.)

                  Comment

                  • Joe M.
                    Extremely Frequent Poster
                    • April 30, 1990
                    • 1338

                    #10
                    Re: 1960 Tail Pipe Through-the-Bumper Insulator Screws

                    The evidence is overwhelming that the cross head, recessed were original, but at least two NCRS judges did not agree. A year ago, different judges did not indicate that cross recessed were incorrect. The good news regarding Flight judging is that the majority of the judges agree on the big point items, but not always on little details like cross head vs. slot head, coil capacitor mounted above or below the coil bracket.

                    Comment

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