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Dashboard FYI

Started by chetbrz, July 17, 2017, 04:21:02 PM

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chetbrz

Dashboard Warning for 28-30 Plymouths.

On my 29 the 6 Dashboard slotted screws that hold the dash in place are an obsolete screw size.  They are round head screws with a thread size of 1/4-24TPI.  Modern machine screw sizes are 1/4-20 and 1/4-28.  The 1/4-24 isn't used anymore especially in a round head with a diameter of 0.567 (approx. 9/16)  and a head height of 0.150 (approx. 5/32)  If you work in this area try not to damage these screws because they are not readily available.  I believe the tap and die may still be available if you have your own metal lathe.

Classic Exotic has 1/4 24 screws but not the correct head size:

http://www.classicandexotic.com/store/c-299-14-24.aspx
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29UJohn

Chet,
Thanks!  Their 1/4-24 Pan head screw looks close!
One of mine popped off when I was installing my dash, liked to never found it in the garage!
John
1929U 4 Dr

abradney

Wow, wish I had read this sooner, my car arrived with 2 of the screws missing, I ended up tapping out to 1/4 20 for the two that were missing and was able to get exact same looking screws to replace.

chetbrz

Quote from: abradney on November 21, 2018, 11:22:07 AM
Wow, wish I had read this sooner, my car arrived with 2 of the screws missing, I ended up tapping out to 1/4 20 for the two that were missing and was able to get exact same looking screws to replace.

Sounds like a good fix and if I had missing screws I think I would do the same.  Trying to find the right profile in 1/4 24 didn't have a lot of options. 

:)  Chet...
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