M4
- Estimated torque
- 8 N·m
- Diameter
- 4 mm
VALICALC · TECHNICAL REFERENCE
Bolt Torque Reference
Explore how preload, diameter and nut factor affect estimated torque. The matrix uses your stated assumptions and is not a universal tightening-torque specification.
SELECT YOUR CONDITIONS
Search within the verified subset. Numeric sizes match complete designations; a nearby size is a candidate, not an exact match.
SELECTED REFERENCE
M10
- Estimated torque
- 20 N·m
- Diameter
- 10 mm
All fields & cell provenance
- Nominal diameter: NASA Fastener Design Manual — Authored T=KFd scenario; diameter/preload chosen by user · verified 2026-10-06 · source value M10.
- Estimated torque: NASA Fastener Design Manual — Authored T=KFd scenario; diameter/preload chosen by user · verified 2026-10-06.
- Diameter: NASA Fastener Design Manual — Authored T=KFd scenario; diameter/preload chosen by user · verified 2026-10-06 · source value 10.
v1.1.0 · verified 2026-10-06 · values use the valid conditions shown above
Continue your workflow
Torque from Force and Radius Calculator →Force from Torque and Radius Calculator →M1020 N·mBack to answer ↑
Explore the verified data
8 matching rows · 8 in this subset
| Nominal diameter | Estimated torque | Diameter | Actions |
|---|---|---|---|
| M4 | 8 N·m | 4 mm | |
| M5 | 10 N·m | 5 mm | |
| M6 | 12 N·m | 6 mm | |
| M8 | 16 N·m | 8 mm | |
| M10 | 20 N·m | 10 mm | |
| M12 | 24 N·m | 12 mm | |
| M16 | 32 N·m | 16 mm | |
| M20 | 40 N·m | 20 mm |
M5
- Estimated torque
- 10 N·m
- Diameter
- 5 mm
M6
- Estimated torque
- 12 N·m
- Diameter
- 6 mm
M8
- Estimated torque
- 16 N·m
- Diameter
- 8 mm
M10
- Estimated torque
- 20 N·m
- Diameter
- 10 mm
M12
- Estimated torque
- 24 N·m
- Diameter
- 12 mm
M16
- Estimated torque
- 32 N·m
- Diameter
- 16 mm
M20
- Estimated torque
- 40 N·m
- Diameter
- 20 mm
How to use this data
T[N·m]=K×F[N]×d[m]. Vary K or preload to compare the conditional torque matrix. No universal torque-by-grade table is implied.
- Default 10000N preload and K=.2 are illustrative user scenarios, not bolt-grade recommendations.
CHECK THE METHOD
Worked example
10 mm diameter,10000N preload and K=.2 give 20N·m. Doubling preload doubles this estimate.
Related calculators
Continue the reference workflow
Common lookup questions
Can I use this as a torque specification?
No. Obtain the appropriate preload, friction assumptions and tightening specification from the joint designer or fastener supplier.
TRACEABLE DATA
Sources, scope & verification
Dataset v1.1.0
Last verified:
Generated torque scenarios for eight diameter examples using your explicit preload and nut factor.
Values are curated product facts or generated scenarios. Paid standards, complete catalogs and source diagrams are not reproduced. A verification date applies to this documented subset.
NASA Fastener Design Manual ↗
Type B · NASA · NASA RP-1228 / 1990-03-01
Government-authored gauge/fastener facts; version and scope retained.
Full provenance & artifact record
- Source checked
- 2026-10-06
- Use basis
- public-domain
- Artifact SHA-256
- 5989e72b3dbc3e245de5cdffcbedb653fc17cb5cf7bcd8591b9a893965f8736f