<VV> Re: valve seat set screw retention/tap sizes

[John]

5-32 is not a standard tap size, 5-40 or 5-44 is standard.  You can
order them from a industrial supply house, for example MSC Industrial
Supply Co.

<http://www.mscdirect.com/>

When ordering ask for a catalog.  You will get a 4 inch thick, hard
bound, fine print, 20 pound monster over 5000 pages!  Great for
flattening out creased gaskets.

John

> From: "Tom Willcox" <bakwudz@rcn.com>
> To: <virtualvairs@corvair.org>
> Date: Mon, 19 Apr 2004 19:32:58 -0400
> Subject: <VV> valve seat set screw retention/tap sizes
> 
> I have a question regarding the "cromwell method" of valve seat retention:
> according to two different sources, I am supposed to finish drilling 1/4
> inch deep with a 9/64 drill, then tap with a 5/32 bottom tap, then insert a
> 5/32 set screw.  After searching for hours, my question: is there such a
> thing as a 5/32 tap OR fastener?  The only things I have found smaller than
> 1/4-20 are 8-32, 10-32, 4-40, etc.  Am I missing something obvious, or is
> this information incorrect?  Where can I find this stuff?  This is driving
> me nuts!  (short drive, btw)
> 
> Thanks,
> 
> Tom Willcox