Mic stand threading - two types or three???

[Fran Guidry]

I'm having a problem connecting mic stand parts, and it has me puzzled.
I was under the impression that there were two types of mic stand
threads - 5/8" 27 pitch US, and 3/8" European. But I'm running into
some parts that appear to be 5/8" male that will not attach to various
5/8" female connections, such as mic clips or a Shure A27M stereo bar.
The problem parts are various 3/8 female to 5/8 male adapters.

OK, so I got some junky parts. Except for two things: I also have a
couple of jam nuts that fit the problem 5/8 parts perfectly, and the
kicker - I have one adapter that's 5/8 female to 5/8 male. The female
side mates perfectly with the problem adapters, and the male side fits
perfectly into the A27M. And (woe is me) I don't know where I got this
magical part.

So, can you point me to a source for 3/8 female -> 5/8 male adapters
that implement the 5/8 27 thread or a source for these magical 5/8
female -> 5/8 male adapters that fix the problem thread?

Thanks very much,
Fran

[Mike Rivers]

Fran Guidry wrote:

> I'm running into
> some parts that appear to be 5/8" male that will not attach to various
> 5/8" female connections, such as mic clips or a Shure A27M stereo bar.
> The problem parts are various 3/8 female to 5/8 male adapters.

> OK, so I got some junky parts. Except for two things: I also have a
> couple of jam nuts that fit the problem 5/8 parts perfectly, and the
> kicker - I have one adapter that's 5/8 female to 5/8 male. The female
> side mates perfectly with the problem adapters, and the male side fits
> perfectly into the A27M. And (woe is me) I don't know where I got this
> magical part.

Sounds like tolerances are working against you. Most mic stand tubes
have rolled threads which tend to be a little oversized. You can try
another adapter and maybe it'll fit better, have a machinst custom make
one for you (he'll need the parts you're trying to fit it to), or get
out the ol' jar of Vaseline. <g>

[Roy W. Rising]

"Fran Guidry" > wrote:
> I'm having a problem connecting mic stand parts, and it has me puzzled.
> I was under the impression that there were two types of mic stand
> threads - 5/8" 27 pitch US, and 3/8" European. But I'm running into
> some parts that appear to be 5/8" male that will not attach to various
> 5/8" female connections, such as mic clips or a Shure A27M stereo bar.
> The problem parts are various 3/8 female to 5/8 male adapters.
>
> OK, so I got some junky parts. Except for two things: I also have a
> couple of jam nuts that fit the problem 5/8 parts perfectly, and the
> kicker - I have one adapter that's 5/8 female to 5/8 male. The female
> side mates perfectly with the problem adapters, and the male side fits
> perfectly into the A27M. And (woe is me) I don't know where I got this
> magical part.
>
> So, can you point me to a source for 3/8 female -> 5/8 male adapters
> that implement the 5/8 27 thread or a source for these magical 5/8
> female -> 5/8 male adapters that fix the problem thread?
>
> Thanks very much,
> Fran
It sounds like you have some poorly cut male threads. You could use a
5/8"-27 die and die chuck to clean them up and make them fit. The jam nuts
likely are over tapped and a bit loose on a good 5/8"-27 stud.

BTW ~ There actually is a third (albeit obsolete) standard: 1/2" NPT
(pipe)!

--
~ Roy
"If you notice the sound, it's wrong!"

[Scott Dorsey]

Fran Guidry > wrote:
>I'm having a problem connecting mic stand parts, and it has me puzzled.
>I was under the impression that there were two types of mic stand
>threads - 5/8" 27 pitch US, and 3/8" European. But I'm running into
>some parts that appear to be 5/8" male that will not attach to various
>5/8" female connections, such as mic clips or a Shure A27M stereo bar.
>The problem parts are various 3/8 female to 5/8 male adapters.
>
>OK, so I got some junky parts. Except for two things: I also have a
>couple of jam nuts that fit the problem 5/8 parts perfectly, and the
>kicker - I have one adapter that's 5/8 female to 5/8 male. The female
>side mates perfectly with the problem adapters, and the male side fits
>perfectly into the A27M. And (woe is me) I don't know where I got this
>magical part.
>
>So, can you point me to a source for 3/8 female -> 5/8 male adapters
>that implement the 5/8 27 thread or a source for these magical 5/8
>female -> 5/8 male adapters that fix the problem thread?

I believe that Atlas Sound will sell you some of them.

You can also buy some 5/8-27 dies from MSC and chase the bad threads.

What you are encountering is sadly typical of the cheap mike stands
with rolled threads.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[Geoff]

Mike Rivers wrote:
> Fran Guidry wrote:
>
>> I'm running into
>> some parts that appear to be 5/8" male that will not attach to
>> various 5/8" female connections, such as mic clips or a Shure A27M
>> stereo bar. The problem parts are various 3/8 female to 5/8 male
>> adapters.
>
>> OK, so I got some junky parts. Except for two things: I also have a
>> couple of jam nuts that fit the problem 5/8 parts perfectly, and the
>> kicker - I have one adapter that's 5/8 female to 5/8 male. The female
>> side mates perfectly with the problem adapters, and the male side
>> fits perfectly into the A27M. And (woe is me) I don't know where I
>> got this magical part.
>
> Sounds like tolerances are working against you. Most mic stand tubes
> have rolled threads which tend to be a little oversized. You can try
> another adapter and maybe it'll fit better, have a machinst custom
> make one for you (he'll need the parts you're trying to fit it to),
> or get out the ol' jar of Vaseline. <g>

Or get a 5/8" 27 pitch US 'die' to correct the lax thread.

geoff

[Geoff]

Scott Dorsey wrote:
..
>
> What you are encountering is sadly typical of the cheap mike stands
> with rolled threads.

Another aspect is that the metal is probably pretty crappy too, and in a
short time you'll have very little thread at all. Don't put an expensive
mic on it at that point, and buy another brand next time !

geoff

[Scott Dorsey]

Geoff > wrote:
>Scott Dorsey wrote:
>> What you are encountering is sadly typical of the cheap mike stands
>> with rolled threads.
>
>Another aspect is that the metal is probably pretty crappy too, and in a
>short time you'll have very little thread at all. Don't put an expensive
>mic on it at that point, and buy another brand next time !

The solution may well be to get one of the Atlas extender gadgets, and to
epoxy it in place over the damaged rolled threads.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[David O'Heare]

"Roy W. Rising" > wrote in message
...

> BTW ~ There actually is a third (albeit obsolete) standard: 1/2" NPT
> (pipe)!

Please, somebody, tell Sony that it's obsolete....

The fancy mic clip/adapter thingie that comes with their wee M-S stereo
microphone is threaded 1/2" NPT. And no, they don't sell adapters (I had a
fried (Thanks Jaan!) make me one, but I hate to impose).

Dave O'Heare
oheareATmagmaDOTca

[Geoff]

Scott Dorsey wrote:
> Geoff > wrote:
>> Scott Dorsey wrote:
>>> What you are encountering is sadly typical of the cheap mike stands
>>> with rolled threads.
>>
>> Another aspect is that the metal is probably pretty crappy too, and
>> in a short time you'll have very little thread at all. Don't put an
>> expensive mic on it at that point, and buy another brand next time !
>
> The solution may well be to get one of the Atlas extender gadgets,
> and to epoxy it in place over the damaged rolled threads.

Dunno about Altas, but I once poxied a 3/8 adaptor onto a 5/8" 0 tpi boom
end ! Still there many years later, I believe.

geoff