Bolt CAD blocks and standard part models, with the dimension table for every size
Choose the part, the size and the length. The table gives you the dimensions, and the downloads give you the part itself: a STEP solid plus DWG and DXF views at 1:1. Everything is free and needs no account.
Standard part CAD models by family
- Screws ISO 4762, ISO 4017, ISO 4014, ISO 10642, DIN 7991, ISO 7380-1, ISO 7380-2, DIN 7984, DIN 6912, ISO 4026, ISO 4027, ISO 4029, ISO 7045, ISO 7046, DIN 603, DIN 6921, DIN 571, DIN 7981, DIN 975, DIN 976-1, DIN 580 1,724 references with CAD files
- Nuts ISO 4032, ISO 10511, ISO 4035, DIN 6923, DIN 1587 57 references with CAD files
- Washers ISO 7089, ISO 7093, DIN 127, DIN 7349 52 references with CAD files
- Retaining rings DIN 471, DIN 472, DIN 6799 130 references with CAD files
- Keys and pins DIN 6885, DIN 6888, ISO 2338, ISO 8734, ISO 8752 838 references with CAD files
- Bearings 6000 series, 6200 series, 6300 series, Miniature deep 70 references with CAD files
- Steel sections IPE beam, HEA wide, HEB wide, W beam,, UPN channel, Equal angle, SHS square, RHS rectangular 367 references with CAD files
Nut and bolt CAD blocks in DWG and DXF, drawn at 1:1
Every screw, nut, washer, ring, key, pin and bearing comes as a 2D file with its views drawn at full size in millimetres: a front view and a top or end view, placed in model space with no title block and no dimensions. You insert it as a block, scale 1, and it sits on the drawing at its true size.
The lines are split across four layers, so you can switch off what you do not need. CONTOUR holds the visible edges, HIDDEN the hidden edges, CENTER the axes, and THREAD the thread, drawn as thin lines at the minor diameter as on a workshop drawing. Holes and heads are true circles and arcs, not polylines, so object snaps land on centres and quadrants.
The DWG is saved as AutoCAD 2010, which current versions of AutoCAD, BricsCAD, DraftSight and most other CAD programs open without conversion. Every DWG is read back after it is written to check that nothing was lost. The DXF carries the same geometry for programs that do not read DWG.
Free STEP files of standard parts, without an account
The STEP file is a 3D solid in millimetres that opens in any 3D CAD program, such as SolidWorks, Inventor, Fusion, FreeCAD, Solid Edge or Creo. Click the file and it downloads. You do not need an account or an email address, and there is no configurator to fill in first.
Threads are cosmetic: the shank is modelled at its nominal diameter with the end chamfer, the same simplification that manufacturer CAD libraries use. A modelled helix would make each file many times heavier and slow down an assembly without telling you anything you need for the design. Steel sections come as 1,000 mm lengths that you can stretch to the length you need.
Mechanical CAD blocks you can check against the table
A CAD file is only as good as the numbers behind it, and a block drawn from an inch chart and rescaled to millimetres is still wrong. Here every dimension has to be confirmed by at least two independent published sources, such as manufacturer and distributor catalogues, before a part is generated. Where the sources disagree, the size stays out until the difference is explained. The sources for each part are listed at the bottom of its page.
The models are then built from those numbers, so the drawing and the table beside it always match. For steel sections the area, mass per metre and moments of inertia are calculated on the model itself and compared with the steel mill catalogues. A section that does not match within 1% is left out.
Where an older DIN edition gives a different dimension from the ISO standard that replaced it, such as the hexagon size of some bolts and nuts, both versions have their own files and the page shows the difference.
Fastener CAD blocks: common questions
- Are these CAD blocks free for commercial work?
- Yes. You can use the files in your own projects, including commercial ones, without attribution. The one thing you cannot do is republish them as a collection in another library. The file license page has the details.
- Which DWG version are the files?
- AutoCAD 2010 format (AC1024). It opens in AutoCAD 2010 and every later version, and in most other programs that read DWG. If yours does not, use the DXF, which holds the same geometry.
- Why is the thread not modelled in the STEP file?
- A real helical thread makes the file much heavier and adds nothing to the fit or the clearances you check in a design. The shank is modelled at the nominal diameter, as manufacturer catalogues do. If you need to show the thread on a drawing, apply your CAD program's cosmetic thread, or use the THREAD layer of the DXF and DWG.
- Do I need to register to download?
- No. Every file downloads directly from its part page. There is no account, no email and no limit on the number of files.
- Is this the official standard?
- No. normtorial is an independent library and is not affiliated with DIN, ISO or any other standards body. The dimensions come from published catalogues and are checked against each other, but they do not replace the current edition of the standard when a contract or an inspection requires it.