M3 · Fine
- Clearance hole
- 3.2 mm
- Series
- Fine
- Nominal bolt diameter
- 3 mm
More dimensions
- Nominal diametral clearance
- 0.2 mm
VALICALC · TECHNICAL REFERENCE
Clearance Hole Chart
Select a fastener size and an available clearance series. Each diameter retains its source and fit label; unavailable series are left unfilled.
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
M8 · Medium
- Clearance hole
- 9 mm
- Series
- Medium
- Nominal bolt diameter
- 8 mm
All fields & cell provenance
- Nominal diametral clearance
- 1 mm
- Bolt / fit: norelem technical information: screws and nuts — Page4 D1 clearance Medium / M8 · verified 2026-10-06 · source value M8 · Medium.
- Clearance hole: norelem technical information: screws and nuts — Page4 D1 clearance Medium / M8 · verified 2026-10-06 · source value 9.
- Series: norelem technical information: screws and nuts — Page4 D1 clearance Medium / M8 · verified 2026-10-06 · source value Medium.
- Nominal bolt diameter: norelem technical information: screws and nuts — Page4 D1 clearance Medium / M8 · verified 2026-10-06 · source value 8.
- Nominal diametral clearance: norelem technical information: screws and nuts — Page4 D1 clearance Medium / M8 · verified 2026-10-06.
v1.1.0 · verified 2026-10-06
M8 · Medium9 mmBack to answer ↑
Explore the verified data
18 matching rows · 18 in this subset
| Bolt / fit | Clearance hole | Series | Nominal bolt diameter | Actions |
|---|---|---|---|---|
| M3 · Fine | 3.2 mm | Fine | 3 mm | |
| M3 · Medium | 3.4 mm | Medium | 3 mm | |
| M4 · Fine | 4.3 mm | Fine | 4 mm | |
| M4 · Medium | 4.5 mm | Medium | 4 mm | |
| M5 · Fine | 5.3 mm | Fine | 5 mm | |
| M5 · Medium | 5.5 mm | Medium | 5 mm | |
| M6 · Fine | 6.4 mm | Fine | 6 mm | |
| M6 · Medium | 6.6 mm | Medium | 6 mm | |
| M8 · Fine | 8.4 mm | Fine | 8 mm | |
| M8 · Medium | 9 mm | Medium | 8 mm | |
| M10 · Fine | 10.5 mm | Fine | 10 mm | |
| M10 · Medium | 11 mm | Medium | 10 mm | |
| M12 · Fine | 13 mm | Fine | 12 mm | |
| M12 · Medium | 13.5 mm | Medium | 12 mm | |
| M16 · Fine | 17 mm | Fine | 16 mm | |
| M16 · Medium | 17.5 mm | Medium | 16 mm | |
| M20 · Fine | 21 mm | Fine | 20 mm | |
| M20 · Medium | 22 mm | Medium | 20 mm |
M3 · Medium
- Clearance hole
- 3.4 mm
- Series
- Medium
- Nominal bolt diameter
- 3 mm
More dimensions
- Nominal diametral clearance
- 0.4 mm
M4 · Fine
- Clearance hole
- 4.3 mm
- Series
- Fine
- Nominal bolt diameter
- 4 mm
More dimensions
- Nominal diametral clearance
- 0.3 mm
M4 · Medium
- Clearance hole
- 4.5 mm
- Series
- Medium
- Nominal bolt diameter
- 4 mm
More dimensions
- Nominal diametral clearance
- 0.5 mm
M5 · Fine
- Clearance hole
- 5.3 mm
- Series
- Fine
- Nominal bolt diameter
- 5 mm
More dimensions
- Nominal diametral clearance
- 0.3 mm
M5 · Medium
- Clearance hole
- 5.5 mm
- Series
- Medium
- Nominal bolt diameter
- 5 mm
More dimensions
- Nominal diametral clearance
- 0.5 mm
M6 · Fine
- Clearance hole
- 6.4 mm
- Series
- Fine
- Nominal bolt diameter
- 6 mm
More dimensions
- Nominal diametral clearance
- 0.4 mm
M6 · Medium
- Clearance hole
- 6.6 mm
- Series
- Medium
- Nominal bolt diameter
- 6 mm
More dimensions
- Nominal diametral clearance
- 0.6 mm
M8 · Fine
- Clearance hole
- 8.4 mm
- Series
- Fine
- Nominal bolt diameter
- 8 mm
More dimensions
- Nominal diametral clearance
- 0.4 mm
M8 · Medium
- Clearance hole
- 9 mm
- Series
- Medium
- Nominal bolt diameter
- 8 mm
More dimensions
- Nominal diametral clearance
- 1 mm
M10 · Fine
- Clearance hole
- 10.5 mm
- Series
- Fine
- Nominal bolt diameter
- 10 mm
More dimensions
- Nominal diametral clearance
- 0.5 mm
M10 · Medium
- Clearance hole
- 11 mm
- Series
- Medium
- Nominal bolt diameter
- 10 mm
More dimensions
- Nominal diametral clearance
- 1 mm
M12 · Fine
- Clearance hole
- 13 mm
- Series
- Fine
- Nominal bolt diameter
- 12 mm
More dimensions
- Nominal diametral clearance
- 1 mm
M12 · Medium
- Clearance hole
- 13.5 mm
- Series
- Medium
- Nominal bolt diameter
- 12 mm
More dimensions
- Nominal diametral clearance
- 1.5 mm
M16 · Fine
- Clearance hole
- 17 mm
- Series
- Fine
- Nominal bolt diameter
- 16 mm
More dimensions
- Nominal diametral clearance
- 1 mm
M16 · Medium
- Clearance hole
- 17.5 mm
- Series
- Medium
- Nominal bolt diameter
- 16 mm
More dimensions
- Nominal diametral clearance
- 1.5 mm
M20 · Fine
- Clearance hole
- 21 mm
- Series
- Fine
- Nominal bolt diameter
- 20 mm
More dimensions
- Nominal diametral clearance
- 1 mm
M20 · Medium
- Clearance hole
- 22 mm
- Series
- Medium
- Nominal bolt diameter
- 20 mm
More dimensions
- Nominal diametral clearance
- 2 mm
How to use this data
Use the selected manufacturer's fit-qualified D1 diameter. Subtract nominal bolt diameter only to explain nominal diametral clearance.
- Clearance is a through-hole size; it is not a tapping drill.
- Nominal diametral clearance is not a complete tolerance stack.
CHECK THE METHOD
Worked example
M8: fine 8.4 mm, medium9.0 mm. The M8×1.25 cutting-tap start is a different 6.8 mm hole.
Continue the reference workflow
Common lookup questions
Where is the free-fit series?
It is outside this verified subset. Missing series are not filled with a guessed rule.
TRACEABLE DATA
Sources, scope & verification
Dataset v1.1.0
Last verified:
Nine selected M3–M20 bolt diameters, fine and medium product implementations. Free-fit series is not included.
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.
norelem technical information: screws and nuts ↗
Type D · NORELEM · 5-page artifact; revision 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.