On 17 Sep 2008 00:31:38 GMT, "DoN. Nichols"
wrote:

On 2008-09-16, LeonNick wrote:
I have a piece of 3/16" rod aluminum,what is the closest size threading
die I can use. Is 10-32 allright?

That looks very close, but slightly too small.

3/16" is 0.1875

and asking for dimensions for a 10-32 screw I get:

================================================== ====================
izalco:dnichols 20:17:36 number-screw 10 32
For a #10-32.000 screw:
Clearance diameter: 0.190 ============
Tap drill diameter: 0.159
================================================== ====================

So -- you would be missing 0.0025" diameter -- not too bad.

Not missing anything. A .1900 major diameter is out of spec for a
standard #10 2A thread and at the high limit for a precision 3A
thread.

Thread: Major diameter:
10-32 UNF-2A .1891/.1831
10-32 UNF-3A .1900/.1840
10-24 UNC-2A .1890/.1818
10-24 UNC-3A .1900/.1828

--
Ned Simmons