CircuitousRoot shop size table v.2 (2007-02-12). Public Domain. Fractions and conversions recalculated.
FASTENERATLAShttps://fasteneratlas.com/sources/
SHEET FA-SRC · METHOD
Sources and verification method
Every published drill or tap record cites one source with its title, edition, locator and the date we checked it. Records are approved individually; changing a value or its source invalidates the approval until it is rechecked.
Inch–millimetre conversion uses the exact definition 1 in = 25.4 mm. Converted figures are shown to four decimal places (mm) or six (in), rounded half-up and labelled as converted; source precision is preserved separately.
Reviewed by Codex — AI source-and-calculation verification, 9 September 2026. Each of the 168 records was checked against its source row, dimensions, units and dependencies. This is AI verification, not independent human engineering certification. Material-specific chart recommendations do not guarantee exact thread engagement.
CircuitousRoot declares its size table Public Domain. Open Oregon adaptations are licensed under CC BY 4.0. The bd_warehouse data uses Apache License 2.0. Selected rows and presentation have been adapted; original publishers do not endorse this site.
SOURCES IN THIS RELEASE
Adapted from Unit 5: Tapping, LamNgeun Virasak, Open Oregon. CC BY 4.0: https://creativecommons.org/licenses/by/4.0/ . Selected rows; wording adapted.
bd_warehouse, Copyright 2024 Gumyr. Apache License 2.0. Selected Soft-column values; presentation adapted. Licence: fasteneratlas.com/licenses/bd-warehouse-Apache-2.0.txt.
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