Observed arrival · 2026-11-12
Normtorial’s standard-part CAD library
A free reference library of standard-part CAD files, dimension tables, and mechanical engineering charts.
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- For
- Mechanical designers using standard fasteners and CAD
- Worth noticing
- The 2D files use four named layers—CONTOUR, HIDDEN, CENTER, and THREAD—and are drawn at 1:1 in millimetres.
Field notes
The library groups files by part family and standard, with the homepage listing 1,724 screw references across 21 standards. Its downloadable 2D views are described as model-space drawings at scale 1, split across four named layers; the sample listing also gives file sizes. Separate reference tools span metric and Unified inch threads, tap drills, ISO fits and tolerances, bolt torque, and spanner sizes.
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○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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