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Hints, Tips and Solutions (Do NOT post requests for help here) If you have any useful general hints and tips for vintage technology repair and restoration, please share them here. PLEASE DO NOT POST REQUESTS FOR HELP HERE!

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Old 12th Feb 2022, 3:14 pm   #1
SWB 18
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Default Nut & Bolt Thread Compilation Identifier Chart.

Hello,

People seem to have problems identifying threads on nuts and bolts from time to time on here.

The chart at the web address given below has proved very useful, along with a pair of digital caliper, many times.

Easier to measure with a bolt than a nut, but if you try some known thread bolts into an unknown thread nut, it will at least narrow things down a little.

I have printed off and laminated a copy for the workshop.

https://pages.cs.wisc.edu/~bolo/workshop/thread.html

Regards,

Phil.
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Old 12th Feb 2022, 9:19 pm   #2
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Default Re: Nut & Bolt Thread Compilation Identifier Chart.

Thanks for that. I have some very old bolts which I suspect are of US original and I'll see what the table suggests for those.

B
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Old 12th Feb 2022, 9:49 pm   #3
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Default Re: Nut & Bolt Thread Compilation Identifier Chart.

Although nowhere near as comprehensive, I have found the following guide quite useful...

https://mae.ufl.edu/designlab/Lab%20...of_threads.pdf
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Old 12th Feb 2022, 9:59 pm   #4
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Default Re: Nut & Bolt Thread Compilation Identifier Chart.

The Zeus guide was the go-to reference for this sort of stuff.

https://www.amazon.co.uk/workshop-de.../dp/B00C77BX46

Craig
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Old 12th Feb 2022, 10:13 pm   #5
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Default Re: Nut & Bolt Thread Compilation Identifier Chart.

Quote:
Originally Posted by Craig Sawyers View Post
The Zeus guide was the go-to reference for this sort of stuff.

https://www.amazon.co.uk/workshop-de.../dp/B00C77BX46

Craig
best book i ever got even to me. i worked with an old guy that gave me one. now iam that old guy lol. think i have had it for 25 years now and still use it.
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Old 13th Feb 2022, 2:06 am   #6
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Default Re: Nut & Bolt Thread Compilation Identifier Chart.

Re #2, this is an extract from the 1942 edition of Machinery's Handbook that has data on the then-current and then-obsolescent US screw thread systems. I have posted it here before but I can't find the thread I posted it on.
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File Type: pdf 1942 US threads (1).pdf (950.6 KB, 58 views)
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Old 13th Feb 2022, 2:09 am   #7
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Default Re: Nut & Bolt Thread Compilation Identifier Chart.

The Zeus is a classic, and the Black Book's good too for workshop reference. My brother has a selection of Model Engineer charts that he's framed in his workshop. I don't use Amazon, but there's a good selection here: https://www.mscdirect.co.uk/CGI/INSRCH?N=4022
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Old 13th Feb 2022, 9:04 am   #8
Craig Sawyers
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Default Re: Nut & Bolt Thread Compilation Identifier Chart.

For those who are Amazon-averse (and I absolutely understand that!), after a quite a look around the only place I could find that is cost competitive for Zeus including shipping is

https://www.sydenhams.co.uk/tools/ha...gineers-miszc/

Craig
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Old 13th Feb 2022, 10:23 am   #9
Mike Phelan
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Default Re: Nut & Bolt Thread Compilation Identifier Chart.

Zeus every time! I still have my edition from the 1940's.
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Old 13th Feb 2022, 11:44 am   #10
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Default Re: Nut & Bolt Thread Compilation Identifier Chart.

Quote:
Originally Posted by Craig Sawyers View Post
The Zeus guide was the go-to reference for this sort of stuff.

https://www.amazon.co.uk/workshop-de.../dp/B00C77BX46

Craig
It's now out of copyright and is available as a pdf download here:


https://kupdf.net/queue/zeus-booklet...I0OS4xODQuMTcx
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Old 13th Feb 2022, 1:21 pm   #11
Craig Sawyers
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Default Re: Nut & Bolt Thread Compilation Identifier Chart.

Good find!
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Old 13th Feb 2022, 1:32 pm   #12
wireman
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Default Re: Nut & Bolt Thread Compilation Identifier Chart.

Quote:
Originally Posted by kellys_eye View Post
It's now out of copyright and is available as a pdf download here:


https://kupdf.net/queue/zeus-booklet...I0OS4xODQuMTcx
Strangely, the version I have has the text COPYRIGHT 2027 in a circle on the back cover, this can't be a meaningful claim to copyright.
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Old 13th Feb 2022, 2:08 pm   #13
Craig Sawyers
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Default Re: Nut & Bolt Thread Compilation Identifier Chart.

Copyright lasts for 70 years. Now since Mike says his dates to the 40s, it is almost certain the copyright has expired.

That said, there is a certain beauty in owning the real version and not a pdif
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Old 14th Feb 2022, 10:50 am   #14
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Default Re: Nut & Bolt Thread Compilation Identifier Chart.

Quote:
Originally Posted by Craig Sawyers View Post
That said, there is a certain beauty in owning the real version and not a pdif
Zeus Charts - Too true - not least the fact it sits in your top pocket (along with a 6 inch flexible rule c/w crocodile clip) - AND it has oil resistant pages.

It's gone up a bit though - a tenner !! (on Amazon anyway). My 1974 edition (purchased when I was an apprentice back in 1977) was 50p. Still used to this day - I have it in front of me now!

Another vote for Machinery's Handbook too which is a great reference for screw threads and many other practical engineering matters. I won mine (20th metric edition) around the same time.

Jerry
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Old 14th Feb 2022, 11:36 am   #15
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Default Re: Nut & Bolt Thread Compilation Identifier Chart.

RPI has gone up 6.9 times since 1977. So 50p would translate to £3.45 . In real terms it has gone up in price by a factor of about three.

Craig
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Old 14th Feb 2022, 12:56 pm   #16
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Default Re: Nut & Bolt Thread Compilation Identifier Chart.

Copyright is somewhat complex, is usually different in different countries, and I have not kept my knowledge up to date since retiring. Unlike patents, there is no specific legal offence of falsely claiming copyright ownership
and I have come across many examples in books and elsewhere of copyright claims that are clearly wrong. Many people seem to be under the misapprehension that, because they own something like an old photograph, they can claim copyright. I haven't seen the Zeus charts, but a distinction can be drawn between the information contained in a chart and how it is printed. There is such a thing as copyright in a typographical arrangement, which I think still lasts 25 years. This means that an exact facsimilie of a work that is out of copyright, will have no copyright protection, but if you create a copy of a work that is out if copyright, using a different font or layout, then you will have 25 years protection for the exact typographical appearance of your version, but not for the information it contains.

While lobbying and international agreements mean that the goalposts are constantly changing, invariably in the direction of extending protection to the benefit of the rights holders, I think the above is still essentially correct.

Last edited by emeritus; 14th Feb 2022 at 1:25 pm. Reason: typos
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Old 14th Feb 2022, 1:19 pm   #17
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Default Re: Nut & Bolt Thread Compilation Identifier Chart.

I have a copy of what was originally called Machinery's Screw Thread Book in its English editions. Mine is entitled " Guide to Word Screw Threads", and is the third printing of the first American edition, which is essentially an expanded version of the 20th British edition to include American self-tapping screws and washers. ( £11.99 from Foyles book shop in 1979). Dating as it does from 1969, it does not include the present metric conduit threads, and a surprising omission is the german screwed conduit thread (Stahlröhrepanzergewinde, PG) , with its thread pitch defined in threads per imperial inch. Although supposedly declared obsolete by 2000, there is still stuff in the UK electrical catalogues like cable glands with PG threads.

Last edited by emeritus; 14th Feb 2022 at 1:41 pm. Reason: typos
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Old 14th Feb 2022, 1:21 pm   #18
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Default Re: Nut & Bolt Thread Compilation Identifier Chart.

Nut and Bolt threads.
Many years ago I compiled my own guide to the smaller threads we use in Radio work, transferred onto a single sheet now laminated and quite oil proof. The data was collected from books and trade tables, the Zeus, Kelly Engineers Directory, Industrial Fasteners Handbook.
Arranged in order of diameter up to 1/4". Showing the usual British radio- BA or BSF, the US Unified Fine used by Tek and HP, the Model Engineers and British Standard Bicycle and Metric. Also included drill clearance and tapping sizes and drill number sizes.
Makes it much easier to identify by comparison with other known bolts.
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Attached Files
File Type: pdf SCAN5261_Threads-wm.pdf (451.0 KB, 68 views)

Last edited by WME_bill; 14th Feb 2022 at 1:27 pm.
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Old 14th Feb 2022, 3:41 pm   #19
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Default Re: Nut & Bolt Thread Compilation Identifier Chart.

Quote:
Originally Posted by Craig Sawyers View Post
RPI has gone up 6.9 times since 1977.

Craig
Can someone measure the document and see if it's shrunk in size?
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Old 14th Feb 2022, 6:13 pm   #20
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Default Re: Nut & Bolt Thread Compilation Identifier Chart.

Quote:
Originally Posted by kellys_eye View Post
Can someone measure the document and see if it's shrunk in size?
My 1974 Zeus edition measures 6.25 x 3.25 inches and comprises 28 sides including the front and back covers.

I guess if anything is going to go it'll be the tables of logs, anti-logs and possibly the sines and tangents ?

Jerry
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