1957 1/4 flat washers - NCRS Discussion Boards

1957 1/4 flat washers

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  • Dan P.
    Very Frequent User
    • December 1, 1990
    • 683

    1957 1/4 flat washers

    T
    he AM shows 2 different part numbers for the flat washers for 1/4 bolts .120392 and 120385 I believe one is USS and the other is SAE. I had all my hardware plated and there are 2 different size washers .So could someone measure the OD of the 1/4" flat washers that mount the inner fenders to the cowl 120392 on a unrestored car .Thanks in advance
  • David B.
    Very Frequent User
    • March 1, 1980
    • 689

    #2
    Re: 1957 1/4 flat washers

    120392 SAE 1/4 zinc .281 inside X .625 OD X .065 thick
    120385 3/16 zinc .250 inside X .562 OD X .049 thick

    Comment

    • Dan P.
      Very Frequent User
      • December 1, 1990
      • 683

      #3
      Re: 1957 1/4 flat washers

      What makes this so confusing is in the AM
      120385 is shown as the flat washer for 3/16 recessed head bolts for the lower filler panel and also shown for the 1/4 bolts that hold the hood strikers on .
      120393 is shown convertible top cover bolts while 120380 is shown for the decklid bolts . They are the same washer. 120393 is shown for the horn bolts which are 5/16??

      Comment

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