Dave,
No self-respecting British bolt manufacurer ever made BA bolts in metric
lengths - 64th's perhaps but never millimetres.
Cheers, "Bob".
> From: Dave & Liz DuBois <ddubois@sinclair.net>
> Date: Mon, 28 Jul 2003 12:05:31 -0700
> To: "Gunnell, John" <gunnellj@krause.com>
> Cc: mg-t@autox.team.net
> Subject: Re: Condensor plate screws
>
> 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
/// unsubscribe/change address requests to majordomo@autox.team.net or try
/// http://www.team.net/mailman/listinfo
/// Archives at http://www.team.net/archive/mg-t
|