For period 1970 to 2000, whatever they are, they are not very common in
Europe. Coarser thread , diam for diam, than the usual European mm and BA.
Common sizes are about 0.132 in outside diam. , pitch 32 TPI, would they be
UNC 6 ?
and 0.11 inch od and TPI about 40 , would they be 4 UNC ?

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

N Cook wrote:

For period 1970 to 2000, whatever they are, they are not very common in
Europe. Coarser thread , diam for diam, than the usual European mm and BA.
Common sizes are about 0.132 in outside diam. , pitch 32 TPI, would they be
UNC 6 ?
and 0.11 inch od and TPI about 40 , would they be 4 UNC ?


You need to try to find a copy of this handy little book:

http://www.sequoiapublishing.com/pdt_pocketref3ed.htm

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

"N Cook" wrote in message
...

For period 1970 to 2000, whatever they are, they are not very common in
Europe. Coarser thread , diam for diam, than the usual European mm and BA.
Common sizes are about 0.132 in outside diam. , pitch 32 TPI, would they
be
UNC 6 ? and 0.11 inch od and TPI about 40 , would they be 4 UNC ?

OK. The most common size is 6-32. 8-32 and 10-32 are also common. This is
AWG size 6, 8 and 10 all with 32 tpi threads.

Also 10-24 and 12-24 with 24 tpi are used.

See http://www.zytrax.com/tech/mech/threads.htm for more.

Homer J Simpson wrote in message
news:nJE7i.68874$g63.47216@edtnps82...

"N Cook" wrote in message
...

For period 1970 to 2000, whatever they are, they are not very common in
Europe. Coarser thread , diam for diam, than the usual European mm and
BA.
Common sizes are about 0.132 in outside diam. , pitch 32 TPI, would they
be
UNC 6 ? and 0.11 inch od and TPI about 40 , would they be 4 UNC ?

OK. The most common size is 6-32. 8-32 and 10-32 are also common. This is
AWG size 6, 8 and 10 all with 32 tpi threads.

Also 10-24 and 12-24 with 24 tpi are used.

See http://www.zytrax.com/tech/mech/threads.htm for more.






But are they what we call UNC ?
and the 40TPI ones ? only measured with a ruler as my thread gauge, in
inches, does not have 40TPI and the mm gauges are not close to any
equivalent.

"N Cook" wrote in message
...

But are they what we call UNC ?
and the 40TPI ones ? only measured with a ruler as my thread gauge, in
inches, does not have 40TPI and the mm gauges are not close to any
equivalent.

See the chart on the web page.

Also http://en.wikipedia.org/wiki/Unified_Thread_Standard

In article ,
"N Cook" wrote:

Homer J Simpson wrote in message
news:nJE7i.68874$g63.47216@edtnps82...

"N Cook" wrote in message
...

For period 1970 to 2000, whatever they are, they are not very common in
Europe. Coarser thread , diam for diam, than the usual European mm and
BA.
Common sizes are about 0.132 in outside diam. , pitch 32 TPI, would they
be
UNC 6 ? and 0.11 inch od and TPI about 40 , would they be 4 UNC ?

OK. The most common size is 6-32. 8-32 and 10-32 are also common. This is
AWG size 6, 8 and 10 all with 32 tpi threads.

Also 10-24 and 12-24 with 24 tpi are used.

See http://www.zytrax.com/tech/mech/threads.htm for more.






But are they what we call UNC ?
and the 40TPI ones ? only measured with a ruler as my thread gauge, in
inches, does not have 40TPI and the mm gauges are not close to any
equivalent.

UNC is a coarse thread. UNF is a fine thread. UNEF is an extra fine
thread. 2-56, 4-40, 6-32, 8-32, and 10-32 are common, but many others
are prevalent as well, including the "odd" numbers, e.g. 3-48.

It's worth noting that 6-32 is a UNC thread while 10-32 is a UNF thread.
The "fine" version of a #6 screw is 40 TPI; the "coarse" version of a
#10 is 24 TPI.

And of course, it goes without saying that the obstinacy of my fellow
Americans, clinging absurdly to a ridiculously clumsy system of
measurement, is pathetic.

"Smitty Two" wrote in message
news
And of course, it goes without saying that the obstinacy of my fellow
Americans, clinging absurdly to a ridiculously clumsy system of
measurement, is pathetic.

Only nation on earth still not using metric, no?


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In article yJN7i.70142$g63.58580@edtnps82,
"Homer J Simpson" wrote:

"Smitty Two" wrote in message
news
And of course, it goes without saying that the obstinacy of my fellow
Americans, clinging absurdly to a ridiculously clumsy system of
measurement, is pathetic.

Only nation on earth still not using metric, no?



That's what I think, but not sure. Let's see, our cars now come with
speedometers that can be switched to indicate km/hr instead of mph, and
liquor is sold in liters instead of quarts. That's the sum total of
fifteen or twenty years' worth of effort to go metric.

In article ,
Smitty Two wrote:
UNC is a coarse thread. UNF is a fine thread. UNEF is an extra fine
thread. 2-56, 4-40, 6-32, 8-32, and 10-32 are common, but many others
are prevalent as well, including the "odd" numbers, e.g. 3-48.

We're fairly used to UNF and UNC in the UK as they were much used on cars
before metric came in - but only really in the larger sizes. For small
stuff Lucas ;-) stuck to BA.

But I still see AF and AC taps and dies around - are the two versions
still used? I realise there's not a vast difference - only basically
thread profile.

--
*'Progress' and 'Change' are not synonyms.

Dave Plowman London SW
To e-mail, change noise into sound.

In article ,
"Dave Plowman (News)" wrote:

In article ,
Smitty Two wrote:
UNC is a coarse thread. UNF is a fine thread. UNEF is an extra fine
thread. 2-56, 4-40, 6-32, 8-32, and 10-32 are common, but many others
are prevalent as well, including the "odd" numbers, e.g. 3-48.

We're fairly used to UNF and UNC in the UK as they were much used on cars
before metric came in - but only really in the larger sizes. For small
stuff Lucas ;-) stuck to BA.


Oh yeah, I keep forgetting that you used to be in this mess with us.


But I still see AF and AC taps and dies around - are the two versions
still used? I realise there's not a vast difference - only basically
thread profile.

Terms with which I'm not familiar...

"Dave Plowman (News)" wrote in message
...

We're fairly used to UNF and UNC in the UK as they were much used on cars
before metric came in - but only really in the larger sizes. For small
stuff Lucas ;-) stuck to BA.

I started off with Whitworth, and later BA. Then we went to metric.



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In article -
media.com, says...
And of course, it goes without saying that the obstinacy of my fellow
Americans, clinging absurdly to a ridiculously clumsy system of
measurement, is pathetic.

It should have gone without saying. But let me turn that on its head:

While the rest of the world clings pathetically to the idea of forcing
a single tyrannical system on everyone, Americans have freely embraced
the idea of duality. We have plenty of legacy equipment that still
works perfectly well and needs support, and when making new we can
choose whatever fits best. There are a few "clingers", but most of
us just saw the metric system as additional options to use at will,
not as a mandatory replacement. Mechanics have tools for both systems
and not only switch freely between them, but take extra advantage from
the wider range. A couple examples: a 12mm wrench will probably work
on that 1/2" bolt head that's partly rusted away; a 1/4" bolt will
probably fit that 6mm hole you just stripped out.

The bottom line: not only are Americans now fully fluent with metric
and decimal measurements, but we are also still fluent with fractions
and SAE, *and also* familiar with conversions and inter-relationships
between the systems. We have the best of both worlds and then some.

In article ,
Bill S. wrote:

In article -
media.com, says...
And of course, it goes without saying that the obstinacy of my fellow
Americans, clinging absurdly to a ridiculously clumsy system of
measurement, is pathetic.

It should have gone without saying. But let me turn that on its head:

While the rest of the world clings pathetically to the idea of forcing
a single tyrannical system on everyone, Americans have freely embraced
the idea of duality. We have plenty of legacy equipment that still
works perfectly well and needs support, and when making new we can
choose whatever fits best. There are a few "clingers", but most of
us just saw the metric system as additional options to use at will,
not as a mandatory replacement. Mechanics have tools for both systems
and not only switch freely between them, but take extra advantage from
the wider range. A couple examples: a 12mm wrench will probably work
on that 1/2" bolt head that's partly rusted away; a 1/4" bolt will
probably fit that 6mm hole you just stripped out.

The bottom line: not only are Americans now fully fluent with metric
and decimal measurements, but we are also still fluent with fractions
and SAE, *and also* familiar with conversions and inter-relationships
between the systems. We have the best of both worlds and then some.

Fully fluent? Most Americans can't read a ruler anymore. Nor can they do
third-grade arithmetic, or construct a sentence in the English language.
You might be fluent, and I might be, but stupidity and ignorance are
rampant. Kids now can't even tell time on an analog clock, and don't
know what "clockwise" means.

And this is hardly a time to be calling other countries "tyrannical,"
while our administration is hell bent on absolute world domination.

Sheesh, hope I'm disagreeing without being disagreeable. Been under some
stress lately.

"Bill S." wrote in message
...


The bottom line: not only are Americans now fully fluent with metric
and decimal measurements

Say what? Most Americans of the US variety wouldn't know a metre from a
kilogram.

Homer J Simpson wrote:

"N Cook" wrote in message
...


For period 1970 to 2000, whatever they are, they are not very common in
Europe. Coarser thread , diam for diam, than the usual European mm and BA.
Common sizes are about 0.132 in outside diam. , pitch 32 TPI, would they
be
UNC 6 ? and 0.11 inch od and TPI about 40 , would they be 4 UNC ?


OK. The most common size is 6-32. 8-32 and 10-32 are also common. This is
AWG size 6, 8 and 10 all with 32 tpi threads.

Also 10-24 and 12-24 with 24 tpi are used.

See http://www.zytrax.com/tech/mech/threads.htm for more.

Now wait a sec.
If you're comparing AWG size with screw sizes as above ?
I think you have your wires crossed!..
#6 wire is larger than #10 wire..
6-32 is smaller than 10-32 screws.

just an observation I made once long ago.



--
"I'm never wrong, once i thought i was, but was mistaken"
Real Programmers Do things like this.
http://webpages.charter.net/jamie_5

"Jamie" t wrote in message
...

See http://www.zytrax.com/tech/mech/threads.htm for more.

Now wait a sec.
If you're comparing AWG size with screw sizes as above ?
I think you have your wires crossed!..
#6 wire is larger than #10 wire..

Which wire guage?

6-32 is smaller than 10-32 screws.

Correct. In fact see http://www.tecratools.com/pages/service/taps_dies.html
for the 24111 Tri-Tap Tool, which taps 6, 8 or 10 size holes at 32 tpi.

In article , says...
For period 1970 to 2000, whatever they are, they are not very common in
Europe. Coarser thread , diam for diam, than the usual European mm and BA.
Common sizes are about 0.132 in outside diam. , pitch 32 TPI, would they be
UNC 6 ?
and 0.11 inch od and TPI about 40 , would they be 4 UNC ?

Sounds like 6-32 and 4-40.

"Bill S." wrote in message
...
In article , says...
For period 1970 to 2000, whatever they are, they are not very common in
Europe. Coarser thread , diam for diam, than the usual European mm and
BA.
Common sizes are about 0.132 in outside diam. , pitch 32 TPI, would they
be
UNC 6 ?
and 0.11 inch od and TPI about 40 , would they be 4 UNC ?

Sounds like 6-32 and 4-40.

Years ago, I worked for an American computer equipment company, and used to
have exactly the same problem with not being able to equate the screws
fitted to the enclosures, to anything available in the UK. I won myself a
right royal bollocking from the UK director of engineering, after I had been
speaking on the phone to one of the design enginering staff in the U.S. I
had phoned him to ask if we could get a stock of the case screws sent over
to us. "Sure" he said. "I guess I could arrange that. What size are the ones
you want ?" "Oh" said I, "about three sixteenths APF". "APF ?" said he.
"What's APF ?" "Why, American **** Fit of course !"

Well, I *was* new to the game and only young. I didn't know much about
America and the good people who live there, and just assumed that our humour
was the same. Didn't do anything like it again though ...

Arfa

Arfa Daily wrote in message
...

"Bill S." wrote in message
...
In article , says...
For period 1970 to 2000, whatever they are, they are not very common in
Europe. Coarser thread , diam for diam, than the usual European mm and
BA.
Common sizes are about 0.132 in outside diam. , pitch 32 TPI, would
they
be
UNC 6 ?
and 0.11 inch od and TPI about 40 , would they be 4 UNC ?

Sounds like 6-32 and 4-40.

Years ago, I worked for an American computer equipment company, and used
to
have exactly the same problem with not being able to equate the screws
fitted to the enclosures, to anything available in the UK. I won myself a
right royal bollocking from the UK director of engineering, after I had
been
speaking on the phone to one of the design enginering staff in the U.S. I
had phoned him to ask if we could get a stock of the case screws sent over
to us. "Sure" he said. "I guess I could arrange that. What size are the
ones
you want ?" "Oh" said I, "about three sixteenths APF". "APF ?" said he.
"What's APF ?" "Why, American **** Fit of course !"

Well, I *was* new to the game and only young. I didn't know much about
America and the good people who live there, and just assumed that our
humour
was the same. Didn't do anything like it again though ...

Arfa



Perhaps APF screws in aeronautics
This flight would have flown over me , not that I would have been aware that
the pilot was hanging out of the cockpit.

http://www.bbc.co.uk/dna/h2g2/A20460782

"The subsequent inquiry revealed that the windscreen had been replaced just
24 hours before the flight, and a number of errors in the procedure resulted
in the wrong size bolts being used to fit the new window. Although the
difference in size was minimal, some 200th of an inch, it was enough to
cause the windscreen to blow out when the pressure differential became too
great between the cabin and outside atmosphere."

At least when I'm hunting for the 1% or less of "American" screws in my pile
of salvaged mm and BA screws the coarse pitch makes them stand out in
comparison. I still don't know if its safe to go out and get a pack of 6-32
and 4-40 UNC machine screws for American equipment, where someone has been
there before and not replaced all.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

In article ,
"N Cook" wrote:

I still don't know if its safe to go out and get a pack of 6-32
and 4-40 UNC machine screws for American equipment, where someone has been
there before and not replaced all.


That's what sheet metal screws are for. Substitute 'em for anything!
Anyway, you can't just get one pack. You've got to have pan head, flat
head, oval head, button head, and socket head, at least -- not counting
different lengths.

Seriously though, Americans don't make consumer electronics anymore.
It's all made in China. Metric for sure.

You are describing a 6-32 screw. Probably NC. (UNC) This is a very common
screw used in the USA. Hope this helps.
Jim


"N Cook" wrote in message
...
For period 1970 to 2000, whatever they are, they are not very common in
Europe. Coarser thread , diam for diam, than the usual European mm and BA.
Common sizes are about 0.132 in outside diam. , pitch 32 TPI, would they
be
UNC 6 ?
and 0.11 inch od and TPI about 40 , would they be 4 UNC ?

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

For just the odd missing screws/bolts situation.
It looks like the solution to this problem is someone in the UK to tie up
with someone in the USA and a packet of assorted small size UNC/UNF nuts and
bolts go surface mail one way and a packet of various small size BA mainly /
mm nuts and bolts goes back the other.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

In article ,
"N Cook" wrote:

For just the odd missing screws/bolts situation.
It looks like the solution to this problem is someone in the UK to tie up
with someone in the USA and a packet of assorted small size UNC/UNF nuts and
bolts go surface mail one way and a packet of various small size BA mainly /
mm nuts and bolts goes back the other.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

Of course we use mostly American stuff in the U.S., but we can easily
get metric when we need it at the hardware store that supplies the
machine shop industry. Is the reverse not true? Have you English guys
asked around at a professional hardware supplier?

"Smitty Two" wrote in message
news
Of course we use mostly American stuff in the U.S., but we can easily
get metric when we need it at the hardware store that supplies the
machine shop industry. Is the reverse not true? Have you English guys
asked around at a professional hardware supplier?

US hardware is quite rare outside N America.


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On May 31, 2:07 pm, "N Cook" wrote:
For period 1970 to 2000, whatever they are, they are not very common in
Europe. Coarser thread , diam for diam, than the usual European mm and BA.
Common sizes are about 0.132 in outside diam. , pitch 32 TPI, would they be
UNC 6 ?
and 0.11 inch od and TPI about 40 , would they be 4 UNC ?

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list onhttp://home.graffiti.net/diverse:graffiti.net/

Yeah, 6-32 and 4-40 two very common thread sizes in US, even today.