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Workspace route
Reference Tables
Review bolt, pipe schedule, and wire gauge tables.
108Source records
0Local saved
0History rows
0Journal rows
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Reference Tables
This route opens the web workflow for Reference Tables.
MetricBolts, ImperialBoltsUNC, PipeSchedules, WireGauges
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Workspace
EngiRef
Engineering formulas, materials, constants, unit conversions, reference tables, and study tools.
10Sections
468Records
6Disciplines
17Categories
119Formulas
56Materials
Reference values are provided for study and quick reference only — verify against current standards and manufacturer data before safety-critical design.
Tensile stress areas follow ISO 898-1, At = (π/4)(d − 0.9382p)². Minor diameter here is the EXTERNAL thread minor d₃ = d − 1.2269p; the imperial UNC table lists the internal-thread minor D₁ instead.
| Size | Pitch mm | Major dia d mm | Minor dia d₃ mm (external) | Tensile area mm2 | Wrench mm |
|---|---|---|---|---|---|
| M3 | 0.5 | 3 | 2.39 | 5.03 | 5.5 |
| M4 | 0.7 | 4 | 3.14 | 8.78 | 7 |
| M5 | 0.8 | 5 | 4.02 | 14.2 | 8 |
| M6 | 1 | 6 | 4.77 | 20.1 | 10 |
| M8 | 1.25 | 8 | 6.47 | 36.6 | 13 |
| M10 | 1.5 | 10 | 8.16 | 58 | 17 |
| M12 | 1.75 | 12 | 9.85 | 84.3 | 19 |
| M14 | 2 | 14 | 11.55 | 115 | 22 |
| M16 | 2 | 16 | 13.55 | 157 | 24 |
| M18 | 2.5 | 18 | 14.93 | 192 | 27 |
| M20 | 2.5 | 20 | 16.93 | 245 | 30 |
| M22 | 2.5 | 22 | 18.93 | 303 | 32 |
| M24 | 3 | 24 | 20.32 | 353 | 36 |
| M27 | 3 | 27 | 23.32 | 459 | 41 |
| M30 | 3.5 | 30 | 25.71 | 561 | 46 |