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Re: Condensor plate screws

To: "Gunnell, John" <gunnellj@krause.com>
Subject: Re: Condensor plate screws
From: Dave & Liz DuBois <ddubois@sinclair.net>
Date: Mon, 28 Jul 2003 12:05:31 -0700
John,

The screws in question are a 4BA X 9mm screw.  There is enough depth to 
the hole to go with a 12mm length, but you would be working with few 
good threads at the bottom of the hole and that would make it rather 
iffy.  If you want to give that a try, you may be able to find 4BA x 
12mm screws at either of the two outfits linked below:
BRITISH TOOLS AND FASTENERS 
<http://www.mrcybermall.com/machine_tool_parts/index.html>  (located in 
California)
Uni-Thread (British thread helicoils) <http://www.uni-thread.com/> 
(located in England and the best bet for finding what you need)

I would suggest that if you do this, you also use a Loctite product 
called Form-A-Thread (P/N 28654) to restore the threads on the upper 
portion of the hole.  In fact this may be an alternative with the 
original screws if their threads are good (if the threads are not good 
the original screws may be available from Moss or Victoria British 
listed with the later SU fuel pumps for the MGBs).  The Form-A-Thread 
should be available from good auto parts stores (not Shucks, Kragen, 
etc. - these are only good fro sales on oil), or from the Eastwood catalog.

A couple other options would be 1) helicoil the hole (helicoil available 
from Uni-Thread).  This may not be a good option as the material in the 
area of these screws is rather thin and may not be thick enough to 
support a helicoil.  2)  Drill and tap the hole for a 8-32 standard 
American machine screw.  This is just a bit larger than the 4BA screw 
and works well as a replacement.  Just watch the head height if you do 
this, it may be necessary to grind the head down somewhat so it doesn't 
interfere with the distributor cap.

Good luck,
Dave

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