BoltGen Plugin vers. 1.82 for Rhino 4/5 with multilingual manuals

Rhino plugin BoltGen and external program BoltGenGUI (Graphical User Interface) are free programs that create accurate Metric and English machine bolts of any length.  In addition, they create inside-thread-cutters (along with hex-nuts with and without threads) to cut threadded holes.

Generated part Names allow easy identification.  Alternatively, BoltGenGUI provides an easy-to-use Graphical User Interface and runs external to Rhinoceros, but uses Rhinoceros as a graphics engine.

Manuals are Google-translated, unfortunately not very accurate.  If you would like to help, please contact me at and I will send you 2 text files, English text and your language (Google-translated) text to improve.  

BoltGen Makes Sockethead Capscrews, Flat head Capscrews, Flat head Machine screws, Oval Heads, Pan heads, and Hex Heads, or just threads only if desired.

Head drives include Torx, Philips, Allen and Hex wrench.

4 bolt styles can be created: threaded, without threads (reducing file size), and each as block instances.

Program is multilingual supporting English, Spanish, German, Czech, Italian, French, and Chinese.

A second command BoltGenAN (in the Rhino dropdown menu or in BoltGenGUI) is provided to make type AN Aircraft Bolts (with wire holes), no Chinese tranlation.

A third command CopyBoltToSurface places copies of a bolt (located at 0,0,0) on surfaces aligned to the surface normal.

For Rapid-Prototyping (to make real bolts and nuts) in the BoltGen plugin version, an additional Menu Dropdown function is included to resize the Inside_Thread_Cutter object called ThreadCutterScaler.  It allows resizing the thread cutter from BoltGen for nut inside threads in the WorldXY plane to increase or reduce thread slop.  Example: multiply by 1.01 to increase size, or 0.99 to reduce size, and can be repeated as necessary.


Link for downloads:


To install:

-- Plugin version:  Download, unZip, right-click BoltGen.rhp, click properties and unblock, and place BoltGen.rhp in Rhinoceros Plug-in Folder.  Start Rhino, choose Tools, Options, Plug-Ins, and Install BoltGen.

Rhino commands are BoltGen, BoltGenAN, CopyBoltToSurface , and ThreadCutterScaler  (also available from drop-down menu selections).

-- GUI version:  (No Chinese translation or CopyBoltToSurface.)  Download, unZip into temporary folder, and execute setup.exe.  The BoltGenGUI program may be executed from your Start menu in folder BoltGen.  Program launches Rhinoceros if not already running (caution: if Rhino is launched, BoltGenGUI will also ask to close Rhinoceros upon exitting the program).  Please see the Read Me.txt file in the download for more information.

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Contact :

Ray McKaig, McVan Aerospace, LLC

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