On Thu, 23 Aug 2007 07:01:48 -0500, Nick Hull
wrote:

I'd like to get a hold of one 4-48 screw to test to see if it
fits into the business (test contact) end of a Federal test
indicator I have. If it fits I will need one or 2 screws at
least 1/2" long, any head or no head, but just to test any 4-48
thread should do. Tough to measure just what it is, but it's not
4-40 or any M3 I tried. Any help appreciated
Nick Hull
2702 Kimbrell RD
Lenoir City TN 37772

865-856-6185

Free men own guns - www(dot)geocities(dot)com/CapitolHill/5357/
=========
I bought a box of 100 set screws in this size.

Look for an envelope with some. I got these to make up extension
rods for my drop test indicator without having to cut the 4-48
male thread.

Drill a hole in the end of the rod just under major diameter, tap
(10-20% depth of thread is adequate) and install setscrew to
proper depth with drop of loctite or superglue. Be sure to clean
the external threads with lacquer thinner before the glue sets.

Tip for drilling ultra small [for me] holes in your lathe. Get a
set of pin vises for an example click on
http://www.use-enco.com/CGI/INSRIT?P...&PARTPG=INLMK3
I got the General equivilant which works fine for me.

Also get drill blanks that just fit in the hollow in the handle.
Chuck up the drill blank in the tailstock and use this as a guide
for the pin vise. Gives very good control / feel and you can
also use this for a tap guide.

They also make sensitive drill chucks, but these are expensive
and you can use the pin vises for other things.
example click on
http://www.use-enco.com/CGI/INPDFF?P...MITEM=290-1293
and see top of page.

Good luck and let the group know how the project turns out.



Unka' George [George McDuffee]
============
Merchants have no country.
The mere spot they stand on
does not constitute so strong an attachment
as that from which they draw their gains.

Thomas Jefferson (1743-1826),
U.S. president. Letter, 17 March 1814.