Custom thread files

[MRWakefield]

Hello all,

Inspired by a recent post on this forum by @AlanMueller where he posted a custom thread file for UN wire thread inserts, I am posting a number of thread files that I've created or curated from various sources. Perhaps this thread (excuse the pun!) could become a repository for custom thread files people have created that they would like to share with the rest of the community.

Attached you will find a zip file You can download a ZIP file which contains the following thread files:

• AN Fittings
• ANSIMetricMProfile - Non Std
• British Brass Thread
• BS 84 Whit Form
• BS84 Whit Form with minor diameters set to max allowable (see edit 9/02/2025 below)
• BS 00093 British Association (BA)
• BS 811 British Standard Cycle with Spokes, Nipples and specials
• DIN 405 Knuckle (without radiuses - these have to be added manually using Fillet)
• ISO 2904 Metric Trapezoidal - Non Std
• ISO 04570 Tyre Valve Threads
• ISO 8038 Metric Form Microscope M25 M27 M32
• ISO 8038 Whit Form Microscope RMS + W26
• ISO Metric Non-Std Sizes
• Model Engineer threads 32 & 24 TPI
• Metric Camera Filter
• Metric Conduit
• NPSM Pipe Thread
• PG Gland Threads
• US Hose Coupling ASME B1.20.7
• Wire Thread Insert - BSF
• Wire Thread Insert - BSW
• Wire Thread Insert - ISO Metric
• Wire Thread Insert - UNC
• Wire Thread Insert - UNF

I can't vouch for the data sources for all of these files and some might have originated from right here on this forum. Some files might be incomplete or contain errors so please double-check!! If you do find anything wrong or missing please post the details here and I'll add and/or amend accordingly (unless you want to do it yourself 😉).

So if you have a custom thread file perhaps you'd like to post it here and share it with the community.

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EDIT 05/03/2024:

I'll start adding any additional files to this first post to make it easier to find any you might be looking for.

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EDIT 09/06/2024:

I have updated the Custom thread files.zip with a new (corrected) version of the NPSM thread file in response to @user015M86Y's post #5. Hopefully this is now correct!

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EDIT 06/01/2025:

Prompted by another thread where @Zoltan3D required a thread for a DIN 11851 coupling I have created a DIN 405 thread file (as I understand it this is the thread standard on these couplings). There's a limit to how many files can be attached to a post so I've added it to the "Custom Thread Files.zip" file attached below.

DIN 405 data sourced from https://www.ring-plug-thread-gages.com/PDChart/Rd-Knuckle-DIN405-thread-data.html
Data is provided in good faith and no warranty is given as to its accuracy. Please check the data for yourself before using it in any designs.
Note that there is no provision in Fusion thread files for radiused crests or roots so these must be added with the fillet command in Fusion.
External threads have a root and crest radius of 0.238507 x Pitch, internal crest radius is 0.255967 x Pitch, and internal root radius of 0.221047 x Pitch.

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EDIT 09/02/2025:

Added a modified BSW & BSF thread file. If you create a file with mean values (which is the norm) the external thread root width is too narrow for Fusion to apply the fillets. I've modified this file so that the minor diameter of external threads is set to the maximum allowable for each size and class. This gives enough space for Fusion to apply the rads. Hope you find it useful.

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EDIT 11/02/2025:

• Replaced the RMS file with ISO 8038 Whit Form Microscope RMS + W26 file.
• Added ISO 8038 Metric Form Microscope M25 M27 M32

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EDIT 23/02/2025:

• Added US Hose Coupling ASME B1.20.7 to zip file.

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EDIT 15/04/2025:

• Added M15x2.5 to the ISO Metric Non-Std file.

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EDIT 17/04/2025:

• Added M48x1.25 to the ISO Metric Non-Std file.

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EDIT 10/07/2025:

Added the following threads:

• AN Fittings
• DIN 405 Knuckle (without radiuses - these have to be added manually using Fillet)
• ISO 04570 Tyre Valve Threads
• Metric Conduit

ZIP file is no longer attached but can be found here.

[RudeJoe]

Well, the M34 was too small.  I guess I need an M35x2.5mm thread.  I was going by the outside diameter of the threads on the nozzle, which is 34mm.  It looks like the tolerance is in the inner threads?  Could you create this for me, or teach me to fish and let me know how to generate myself?  Thanks!

[MRWakefield]

The major diameter of an M34 (irrespective of the pitch) should be pretty close to Ø34mm so I don't think you can be too far off with your first guess. Similarly M35 would be close to Ø35mm. Don't forget that when 3D printing parts that they generally come out over size on male features and undersize on female features. It might be that it's the correct thread but it just needs some slight adjustments. I've written a guide to adjusting threads for 3D printing which you'll find linked in my signature below.

If you want to create your own custom threads then I've developed an application for this. You'll find a forum thread here explaining a bit about it and a link to my Ko-Fi page where you can download it.

EDIT: I see from my Ko-Fi page that it looks like you've already downloaded my app yesterday so you're half way there 😉 .

[RudeJoe]

Marcus,  Thanks for your continued help.  I don't think I downloaded your thread application the other day, but I did today.  I assume I can load the thread files you've created to modify the one I need, per your offset guide?  If so,  how?  The App looks for CSV files and the thread files are HTML, correct?  Thanks again

[MRWakefield]

You're welcome. Sorry, yes, I was mistaken. I can see that you downloaded the custom thread files the other day but not the app.

The thread files are in XML (rather than HTML) and my app is designed to open these. However, it's much easier to work with CSV files than it is XML so with my app you can convert an XML thread file into CSV. You can then edit the CSV, changing values, adding new designations etc. then convert it back into the XML that Fusion understands. You'll find a PDF 'Rough Guide' in the Help menu. This will explain the basics of converting between XML and CSV using the app. I've just noticed that the images in the guide have been downsampled so I need to look into this and rectify it. Anyway, you should hopefully understand the basics once you've read it. If you want to add new sizes to an existing CSV you can either use the 'Manual Entry' form, or the 'Thread Calculator' form (depending on which is most appropriate). In the case of the Metric Non-Std file, I would load it into the calculator, use the calculator to calculate the values for the sizes you want to add then add these as new rows in the CSV. You can then save the CSV over the old one. If needed you can then open the CSV in your favourite spreadsheet program to sort the data by Size and PitchVal then use the app to convert it to XML. It sounds complicated when you write it down but it's all pretty simple and straight-forward.

Have a play and if you get stuck on anything then come back here and I'll try to help. Have you read through the forum thread discussing the app? There might be more information over there that might help you get started

EDIT:

I've fixed the rough guide images but the forum isn't letting me attach the file. I've updated the Windows installer with the new version so if you have difficulty seeing the screenshots in the rough guide then just download and run the installer again.

[christophe_gilsonD7FBS]

Is it possible to add 32x1mm thread for a coffee ? 😉 

Thanks !

[MRWakefield]

I was just on my way out but thought I'd squeeze your request in. If you download the collection from my Ko-Fi page it should now include M32x1 6g, 6H and 4g6g. Let me know if you have any problems. I'll be away from my computer for a few hours so you might have to wait for a response.