Going nuts...

Paul2727

Paul2727

Registered
5 Jun 2018
237
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England
Help...
This thread. (Pun intended.) is a cry for help about ridiculously small metric nuts and threads.
Basically, I'm wanting to put a thread on the ends of 2 mm brass rod. However I'm not sure which metric thread would be suitable.
I've tried searching for a chart showing external thread size in relation to the size of the rod to be threaded, to no avail.
I'm sure someone must have such a chart or know what size die I need to do this.
Cheers,
Paul.
 

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korm kormsen

korm kormsen

Registered
24 Oct 2009
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i would try that with a No: 4NS36 cutter.
 
P

phils2um

Phil S
11 Sep 2015
448
235
Ann Arbor, Michigan
Maybe I'm missing something here but wouldn't a M2 die be the appropriate die to thread a 2mm diameter rod?

Edit added:
From page 246, Thomas J. Glover, Pocket Ref, Fourth Edition, Sequoia Publishing Inc., 2015 - "Clearance Holes for Bolts and Screws - Metric Series"
Bolt or screw size: 2, Nominal diameter millimeter: 2.00, close clearance hole: 2.10, normal clearance hole: 2.25, loose clearance: 2.40
bolt or screw size: 1.8, Nominal diameter millimeter: 1.80, close clearance hole: 1.90, normal clearance hole: 2.00, loose clearance: 2.15

Based on the above, and what you want to do, you might also be able to use a M1.8 die without turning down the rod if you were very careful!

By the way, Pocket Ref is a very handy little reference guide for everything from abrasives to zinc sheet gauge (first and last entries in the index). I highly recommend anyone with an engineering/mechanical/electrical bent have one. This particular volume is more taylored for U.S./North America. There is probably a similar reference directed toward Europe.

edited again in an attempt to make clearer!
 
Last edited:
Paul2727

Paul2727

Registered
5 Jun 2018
237
48
England
Maybe I'm missing something here but wouldn't a M2 die be the appropriate die to thread a 2mm diameter rod?

Edit added:
From page 246, Thomas J. Glover, Pocket Ref, Fourth Edition, Sequoia Publishing Inc., 2015 - "Clearance Holes for Bolts and Screws - Metric Series"
Bolt or screw size: 2, Nominal diameter millimeter: 2.00, close clearance hole: 2.10, normal clearance hole: 2.25, loose clearance: 2.40
bolt or screw size: 1.8, Nominal diameter millimeter: 1.80, close clearance hole: 1.90, normal clearance hole: 2.00, loose clearance: 2.15

Based on the above, and what you want to do, you might also be able to use a M1.8 die without turning down the rod if you were very careful!

By the way, Pocket Ref is a very handy little reference guide for everything from abrasives to zinc sheet gauge (first and last entries in the index). I highly recommend anyone with an engineering/mechanical/electrical bent have one. This particular volume is more taylored for U.S./North America. There is probably a similar reference directed toward Europe.

edited again in an attempt to make clearer!
Thanks Phil,
I thought that M2 would be right, but wasn't sure. I'll get a M2 die and give it a go.
Regards,
Paul.
 
Greg Elmassian

Greg Elmassian

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m2 won't have enough thread, I agree with Phil... notice for a bolt, only the smallest mode has an outer diameter of 2mm, the rest use a diameter greater than 2mm, so the threads will probably be not full depth/height
 
P

Paul M

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By the way, Pocket Ref is a very handy little reference guide for everything from abrasives to zinc sheet gauge (first and last entries in the index). I highly recommend anyone with an engineering/mechanical/electrical bent have one. This particular volume is more taylored for U.S./North America. There is probably a similar reference directed toward Europe.
We had Zeus books when I was an apprentice, very handy little book, I'm not sure what happened to mine, I really ought to replace it
 
dunnyrail

dunnyrail

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The following Google search brought up some tables. Sorry thought that I had posted this yesterday but was just sat waiting for me to press the post button!

08A205D8-2DEA-43C8-ABFC-67D5319DF4D8.png
 
Greg Elmassian

Greg Elmassian

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I looked a bit more, for external threads, your M2 rod needs to be 1.982 mm, so if it is 2mm rod you should be able to cut full depth threads.


It's a bit hard to find a die chart, most are called tap and die charts, but are only tap charts.

Greg
 
Paul2727

Paul2727

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England
It really is a mine field isn't it...
Good job I bought a set containing M1.0 M1.1 M1.2 M1.4 M1.6 M1.8 M2.0 M2.2 M2.5 taps and dies then. One pair of theses is bound to do the job in hand.
And all this just for a couple of handrails...
Regards,
Paul
 
Last edited:
Northsider

Northsider

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P

phils2um

Phil S
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Ann Arbor, Michigan
Don't forget your cutting fluid!
 
Northsider

Northsider

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Don't forget your cutting fluid!
Absolutely -it stops the metal 'tearing' which can give a very poor thread. Slap on the cutting custard!
 
dunnyrail

dunnyrail

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Absolutely -it stops the metal 'tearing' which can give a very poor thread. Slap on the cutting custard!
I actually think this thread is quite interesting.
 
David1226

David1226

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That was appalling, pitching your puns on here
That's because he's nuts, whereas I consider myself a bit of a stud, although my wife regards me as just a washer, but she cannot torque.

David
 
PhilP

PhilP

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5 Jun 2013
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It would be sooooooooooooooo much easier..

If 'Metric' spanners were marked 'M6' 'M3' etc. :nerd::nod: After all, 'BA' spanners, are so-marked! :think::)
 
JimmyB

JimmyB

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It would be sooooooooooooooo much easier..

If 'Metric' spanners were marked 'M6' 'M3' etc. :nerd::nod: After all, 'BA' spanners, are so-marked! :think::)
No BA spanners are marked 2 BA 4 Ba 6 BA etc, they never use M markings ;)
 
JimmyB

JimmyB

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That's because he's nuts, whereas I consider myself a bit of a stud, although my wife regards me as just a washer, but she cannot torque.

David
Maybe the root of the problem.
 
David1226

David1226

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No BA spanners are marked 2 BA 4 Ba 6 BA etc, they never use M markings ;)
Of course in Shakespeare's Day, spanners were just marked '2B or not 2B'.

David
 
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dunnyrail

dunnyrail

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Of course in Shakespeare's Day, spanners were just marked '2B or not 2B'.

David
Think you should be a little sheepish about that lack of the a.