However, I am
not sure 5-40 UNC screws are any easier to find (at
least not over here, as I said, even getting the 'mormal' 2-56, 4-40,
6-32, 8-32 is difficult). And it's not 'right'. I might as well spend
a couple of afternoons in the garage making the right screws.
There are some
application-specific wierdnesses too. For example,
tacquets on US-made piston valvesets for musical instruments are 3-
48. Fortunately, I do have a set of taps and a die for that
thread.
??? 5-40, 3-48 etc. are all perfectly "normal" sizes (any decent hardware store
will have them, although I wouldn't place any bets on finding the odd numbers at say
Home Depot)
And Tony, maybe instead of calling it a 6-32 you would have better luck in the UK asking
for a "computer case screw."
The demise of "decent hardware stores" is perhaps a different thread.
Tim.