engineering/mech/standards/fasteners.py carries ISO 4014:2011 / ISO 4017:2014
head dimensions (s, k), ISO 4032:2012 nut heights, ISO 7089:2000 washer
d1/d2/h and ISO 4762:2004 socket head cap screws, plus the ISO 261:1998 coarse
pitch column. bearings.py carries the ISO 15:2017 deep groove boundary
dimensions for 6000-6010, 6200-6210 and 6300-6310.
Only the ISO 261 first-choice sizes ship. M14/M18/M22/M27/M33, everything above
M36 (above M24 for ISO 4762), the 618x/619x/16xx bearing series, bore numbers
above 10 and every suffixed bearing variant are refused by name rather than
interpolated: a narrow table is merely narrow, a wrong row ships a wrong
workshop drawing. Across-corners e is derived geometry (2s/sqrt(3)), so no e
column had to be transcribed at all, and the ISO 8826-1 cross and ISO 8826-2
element-symbol fractions are declared drawing conventions, not table values.
No ActiveX member is called by this task, so no live AutoCAD probe was needed;
the two modules are pure tables and pure arithmetic.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
