[TR] "toilet seat" screws

[Dave1massey at cs.com (Dave1massey at cs.com)]

In a message dated 3/4/2012 6:29:27 PM Central Standard Time, 
TR3driver at ca.rr.com writes: 
> 4BA, I think.  Might be the wrong number, but they are definitely BA, not
> UN/SAE threads.
> 
> 

Thanks.  Um,  I just checked my favorite hardware store (McMaster Carr) and 
it seems they don't carry any BA taps.  Where can one acquire one?

Thanks again.

Dave