Are there screws or bolts which have threads on one end at outside and
at another end inside? One end goes into a nut and another end is like
a deep nut closed at the end where it becomes a screw?
Where broader end has threads inside and narrower end has thread
Learn about rec.guns at http://www.recguns.com
In electronics, we use something called a
stacking standoff that might work. A stacking
standoff is either round or hex stock with
one end turned down and threaded and the
other end drilled and tapped.
Threads of 4-40, 6-32 and I believe 8-32
are common with of-the-shelf lengths up
to about an inch in 1/16's increments.
As one poster mentioned, there are standoffs you can get but you didn't say
what size you wanted. For something from 1/4" on up to around 3/4" you may
want to consider making some up from some threaded rod and couplers. These
can be found at the borgs or most hardware stores. For your application,
cut a section of the threaded rod (same size and tpi as the coupler) and
screw it about half way in. You may want to peen the end of the coupler or
add some Locktite on the threaded rod section to make it more or less
permanent. For the other end, use the bolt that also has the same size and
tpi (i.e. 1/4"x20).
Thanks to all who responded.
I need 1.5cm length at narrow end,
and at the broader end length needs to be upto 4cm long.
I need to bridge the gap of 4.5cm between bolt and nut where alignment
has to be absolutely perfect.
Not being able to locate responses I have posted a mail today which
may please be ignored.
As others have said, that's a standoff.
Log to: http://www.digikey.com
Type 'Standoff' into the search window and click 'go'.
Select 'Spacers/Standoffs(1559 items)' from the resulting dialog.
In the resulting dialog, from the fourth column to the right, select 'Hex Threaded
On the middle left of that dialog, click 'Apply Filters'
Resolve the material and size available from the resulting dialogs.
Enjoy (TM: DoN)
Btw..this is the sort of stuff turret or capstan lathes are a joy to
"This device is provided without warranty of any kind as to reliability,
accuracy, existence or otherwise or fitness for any particular purpose
and Bioalchemic Products specifically does not warrant, guarantee,
imply or make any representations as to its merchantability for any
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responsibility to you or any other person, entity or deity with respect
to any loss or damage whatsoever caused by this device or object or by
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into a deep well or any other means whatsoever and moreover asserts
that you indicate your acceptance of this agreement or any other
agreement that may he substituted at any time by coming within
five miles of the product or observing it through large telescopes or
by any other means because you are such an easily cowed moron
who will happily accept arrogant and unilateral conditions on a piece
of highly priced garbage that you would not dream of accepting on a
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I will try to locate someone selling
Keep in mind though that a fastner that has a sharp transition from one size
another creates a stress area at that point. If the application is not very
duty, you have a huge chance of it snapping where the transition takes
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