M4 · DIN hex
- Across flats / wrench
- 7 mm
- Head family
- DIN hex
- Thread diameter
- 4 mm
VALICALC · TECHNICAL REFERENCE
Bolt & Wrench Size Chart
Look up an across-flats dimension for the selected bolt head family. Nominal thread size alone may lead to different wrench sizes.
LOOK UP & COMPARE
Search within the verified subset. Numeric sizes match complete designations; a nearby size is a candidate, not an exact match.
SELECTED REFERENCE
M10 · ISO/ANSI hex
- Across flats / wrench
- 16 mm
- Head family
- ISO/ANSI hex
- Thread diameter
- 10 mm
All fields & cell provenance
- Bolt / head family: Bolt Depot metric bolt head dimensions — Metric Bolt Head/Wrench Size / M10 ISO/ANSI hex · verified 2026-10-06 · source value M10 · ISO/ANSI hex.
- Across flats / wrench: Bolt Depot metric bolt head dimensions — Metric Bolt Head/Wrench Size / M10 ISO/ANSI hex · verified 2026-10-06 · source value 16.
- Head family: Bolt Depot metric bolt head dimensions — Metric Bolt Head/Wrench Size / M10 ISO/ANSI hex · verified 2026-10-06 · source value ISO/ANSI hex.
- Thread diameter: Bolt Depot metric bolt head dimensions — Metric Bolt Head/Wrench Size / M10 ISO/ANSI hex · verified 2026-10-06 · source value 10.
v1.1.0 · verified 2026-10-06
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Torque from Force and Radius Calculator →Force from Torque and Radius Calculator →M10 · ISO/ANSI hex16 mmBack to answer ↑
Explore the verified data
23 matching rows · 23 in this subset
| Bolt / head family | Across flats / wrench | Head family | Thread diameter | Actions |
|---|---|---|---|---|
| M4 · DIN hex | 7 mm | DIN hex | 4 mm | |
| M4 · ISO/ANSI hex | 7 mm | ISO/ANSI hex | 4 mm | |
| M4 · JIS hex | 7 mm | JIS hex | 4 mm | |
| M5 · DIN hex | 8 mm | DIN hex | 5 mm | |
| M5 · ISO/ANSI hex | 8 mm | ISO/ANSI hex | 5 mm | |
| M5 · JIS hex | 8 mm | JIS hex | 5 mm | |
| M6 · DIN hex | 10 mm | DIN hex | 6 mm | |
| M6 · ISO/ANSI hex | 10 mm | ISO/ANSI hex | 6 mm | |
| M6 · JIS hex | 10 mm | JIS hex | 6 mm | |
| M8 · DIN hex | 13 mm | DIN hex | 8 mm | |
| M8 · ISO/ANSI hex | 13 mm | ISO/ANSI hex | 8 mm | |
| M8 · JIS hex | 12 mm | JIS hex | 8 mm | |
| M10 · DIN hex | 17 mm | DIN hex | 10 mm | |
| M10 · ISO/ANSI hex | 16 mm | ISO/ANSI hex | 10 mm | |
| M10 · JIS hex | 14 mm | JIS hex | 10 mm | |
| M12 · DIN hex | 19 mm | DIN hex | 12 mm | |
| M12 · ISO/ANSI hex | 18 mm | ISO/ANSI hex | 12 mm | |
| M12 · JIS hex | 17 mm | JIS hex | 12 mm | |
| M16 · DIN hex | 24 mm | DIN hex | 16 mm | |
| M16 · ISO/ANSI hex | 24 mm | ISO/ANSI hex | 16 mm |
M4 · ISO/ANSI hex
- Across flats / wrench
- 7 mm
- Head family
- ISO/ANSI hex
- Thread diameter
- 4 mm
M4 · JIS hex
- Across flats / wrench
- 7 mm
- Head family
- JIS hex
- Thread diameter
- 4 mm
M5 · DIN hex
- Across flats / wrench
- 8 mm
- Head family
- DIN hex
- Thread diameter
- 5 mm
M5 · ISO/ANSI hex
- Across flats / wrench
- 8 mm
- Head family
- ISO/ANSI hex
- Thread diameter
- 5 mm
M5 · JIS hex
- Across flats / wrench
- 8 mm
- Head family
- JIS hex
- Thread diameter
- 5 mm
M6 · DIN hex
- Across flats / wrench
- 10 mm
- Head family
- DIN hex
- Thread diameter
- 6 mm
M6 · ISO/ANSI hex
- Across flats / wrench
- 10 mm
- Head family
- ISO/ANSI hex
- Thread diameter
- 6 mm
M6 · JIS hex
- Across flats / wrench
- 10 mm
- Head family
- JIS hex
- Thread diameter
- 6 mm
M8 · DIN hex
- Across flats / wrench
- 13 mm
- Head family
- DIN hex
- Thread diameter
- 8 mm
M8 · ISO/ANSI hex
- Across flats / wrench
- 13 mm
- Head family
- ISO/ANSI hex
- Thread diameter
- 8 mm
M8 · JIS hex
- Across flats / wrench
- 12 mm
- Head family
- JIS hex
- Thread diameter
- 8 mm
M10 · DIN hex
- Across flats / wrench
- 17 mm
- Head family
- DIN hex
- Thread diameter
- 10 mm
M10 · ISO/ANSI hex
- Across flats / wrench
- 16 mm
- Head family
- ISO/ANSI hex
- Thread diameter
- 10 mm
M10 · JIS hex
- Across flats / wrench
- 14 mm
- Head family
- JIS hex
- Thread diameter
- 10 mm
M12 · DIN hex
- Across flats / wrench
- 19 mm
- Head family
- DIN hex
- Thread diameter
- 12 mm
M12 · ISO/ANSI hex
- Across flats / wrench
- 18 mm
- Head family
- ISO/ANSI hex
- Thread diameter
- 12 mm
M12 · JIS hex
- Across flats / wrench
- 17 mm
- Head family
- JIS hex
- Thread diameter
- 12 mm
M16 · DIN hex
- Across flats / wrench
- 24 mm
- Head family
- DIN hex
- Thread diameter
- 16 mm
M16 · ISO/ANSI hex
- Across flats / wrench
- 24 mm
- Head family
- ISO/ANSI hex
- Thread diameter
- 16 mm
How to use this data
Choose the exact head family before reading its published nominal across-flats dimension.
- Confirm actual head style/family; nominal thread diameter alone cannot determine wrench size.
CHECK THE METHOD
Worked example
M10 hex: 16 mm in the listed ISO/ANSI family,17 mm DIN,14 mm JIS.
Related calculators
Continue the reference workflow
Common lookup questions
Why are there several M10 wrench sizes?
Different head families specify different across-flats dimensions. Check the actual fastener drawing or head.
TRACEABLE DATA
Sources, scope & verification
Dataset v1.1.0
Last verified:
Eight common metric nominal bolt sizes in selected ISO/ANSI, DIN and JIS hex families. Heavy-hex and US inch bolt families remain outside this release.
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.
Bolt Depot metric bolt head dimensions ↗
Type D · BOLT · page version not stated
Selected dimensional product facts only; no catalog text, diagrams, standard tolerances or full paid-standard tables.
Full provenance & artifact record
- Source checked
- 2026-10-06
- Use basis
- bounded-product-facts
- Artifact SHA-256
- Public web page inspected; no retained source artifact hash.