M3 × 0.5
- Major diameter
- 3 mm
- Pitch
- 0.5 mm
- Series
- Coarse
More dimensions
- Supplier starting drill
- 2.5 mm
- Medium clearance
- 3.4 mm
- Fine clearance
- 3.2 mm
- Equivalent TPI
- 50.8
VALICALC · TECHNICAL REFERENCE
Metric Thread Pitch Chart
Look up a metric thread size and compare its available pitch variants. Matching drill and clearance references stay linked to the selected thread family.
QUICK LOOKUP
Search within the verified subset. Numeric sizes match complete designations; a nearby size is a candidate, not an exact match.
SELECTED REFERENCE
M8 × 1.25
- Major diameter
- 8 mm
- Pitch
- 1.25 mm
- Series
- Coarse
All fields & cell provenance
- Supplier starting drill
- 6.8 mm
- Medium clearance
- 9 mm
- Fine clearance
- 8.4 mm
- Equivalent TPI
- 20.32
- Thread: Bolt Depot metric pitch product reference — Metric Thread Pitch Table: diameter 8 · verified 2026-10-06 · source value M8 × 1.25.
- Major diameter: Accu ISO Metric Thread Dimensions — Coarse thread product dimension 8 · verified 2026-10-06 · source value 8.
- Pitch: Bolt Depot metric pitch product reference — Metric pitch variant 8 / 1.25 · verified 2026-10-06 · source value 1.25.
- Series: Bolt Depot metric pitch product reference — Metric Thread Pitch Table: diameter 8 · verified 2026-10-06 · source value Coarse.
- Supplier starting drill: Accu ISO Metric Thread Dimensions — Metric product chart: tapping drill 8 · verified 2026-10-06 · source value 6.8.
- Medium clearance: norelem technical information: screws and nuts — Page4 D1 medium / M8 · verified 2026-10-06 · source value 9.
- Fine clearance: norelem technical information: screws and nuts — Page4 D1 fine / M8 · verified 2026-10-06 · source value 8.4.
- Equivalent TPI: OSG Pocket Decimal Chart — Derived:25.4/pitch; exact inch conversion · verified 2026-10-06 · source value 20.32.
v1.1.0 · verified 2026-10-06
M8 × 1.258 mmBack to answer ↑
Explore the verified data
16 matching rows · 16 in this subset
| Thread | Major diameter | Pitch | Series | Actions |
|---|---|---|---|---|
| M3 × 0.5 | 3 mm | 0.5 mm | Coarse | |
| M4 × 0.7 | 4 mm | 0.7 mm | Coarse | |
| M5 × 0.8 | 5 mm | 0.8 mm | Coarse | |
| M6 × 1 | 6 mm | 1 mm | Coarse | |
| M8 × 1 | 8 mm | 1 mm | Fine | |
| M8 × 1.25 | 8 mm | 1.25 mm | Coarse | |
| M10 × 1 | 10 mm | 1 mm | Fine | |
| M10 × 1.25 | 10 mm | 1.25 mm | Fine | |
| M10 × 1.5 | 10 mm | 1.5 mm | Coarse | |
| M12 × 1.25 | 12 mm | 1.25 mm | Fine | |
| M12 × 1.5 | 12 mm | 1.5 mm | Fine | |
| M12 × 1.75 | 12 mm | 1.75 mm | Coarse | |
| M14 × 1.5 | 14 mm | 1.5 mm | Fine | |
| M14 × 2 | 14 mm | 2 mm | Coarse | |
| M16 × 2 | 16 mm | 2 mm | Coarse | |
| M20 × 2.5 | 20 mm | 2.5 mm | Coarse |
M4 × 0.7
- Major diameter
- 4 mm
- Pitch
- 0.7 mm
- Series
- Coarse
More dimensions
- Supplier starting drill
- 3.3 mm
- Medium clearance
- 4.5 mm
- Fine clearance
- 4.3 mm
- Equivalent TPI
- 36.286
M5 × 0.8
- Major diameter
- 5 mm
- Pitch
- 0.8 mm
- Series
- Coarse
More dimensions
- Supplier starting drill
- 4.2 mm
- Medium clearance
- 5.5 mm
- Fine clearance
- 5.3 mm
- Equivalent TPI
- 31.75
M6 × 1
- Major diameter
- 6 mm
- Pitch
- 1 mm
- Series
- Coarse
More dimensions
- Supplier starting drill
- 5 mm
- Medium clearance
- 6.6 mm
- Fine clearance
- 6.4 mm
- Equivalent TPI
- 25.4
M8 × 1
- Major diameter
- 8 mm
- Pitch
- 1 mm
- Series
- Fine
More dimensions
- Supplier starting drill
- 7 mm
- Medium clearance
- 9 mm
- Fine clearance
- 8.4 mm
- Equivalent TPI
- 25.4
M8 × 1.25
- Major diameter
- 8 mm
- Pitch
- 1.25 mm
- Series
- Coarse
More dimensions
- Supplier starting drill
- 6.8 mm
- Medium clearance
- 9 mm
- Fine clearance
- 8.4 mm
- Equivalent TPI
- 20.32
M10 × 1
- Major diameter
- 10 mm
- Pitch
- 1 mm
- Series
- Fine
More dimensions
- Supplier starting drill
- Not available
- Medium clearance
- 11 mm
- Fine clearance
- 10.5 mm
- Equivalent TPI
- 25.4
M10 × 1.25
- Major diameter
- 10 mm
- Pitch
- 1.25 mm
- Series
- Fine
More dimensions
- Supplier starting drill
- Not available
- Medium clearance
- 11 mm
- Fine clearance
- 10.5 mm
- Equivalent TPI
- 20.32
M10 × 1.5
- Major diameter
- 10 mm
- Pitch
- 1.5 mm
- Series
- Coarse
More dimensions
- Supplier starting drill
- 8.5 mm
- Medium clearance
- 11 mm
- Fine clearance
- 10.5 mm
- Equivalent TPI
- 16.933
M12 × 1.25
- Major diameter
- 12 mm
- Pitch
- 1.25 mm
- Series
- Fine
More dimensions
- Supplier starting drill
- Not available
- Medium clearance
- 13.5 mm
- Fine clearance
- 13 mm
- Equivalent TPI
- 20.32
M12 × 1.5
- Major diameter
- 12 mm
- Pitch
- 1.5 mm
- Series
- Fine
More dimensions
- Supplier starting drill
- Not available
- Medium clearance
- 13.5 mm
- Fine clearance
- 13 mm
- Equivalent TPI
- 16.933
M12 × 1.75
- Major diameter
- 12 mm
- Pitch
- 1.75 mm
- Series
- Coarse
More dimensions
- Supplier starting drill
- 10.2 mm
- Medium clearance
- 13.5 mm
- Fine clearance
- 13 mm
- Equivalent TPI
- 14.514
M14 × 1.5
- Major diameter
- 14 mm
- Pitch
- 1.5 mm
- Series
- Fine
More dimensions
- Supplier starting drill
- Not available
- Medium clearance
- Not available
- Fine clearance
- Not available
- Equivalent TPI
- 16.933
M14 × 2
- Major diameter
- 14 mm
- Pitch
- 2 mm
- Series
- Coarse
More dimensions
- Supplier starting drill
- 12 mm
- Medium clearance
- Not available
- Fine clearance
- Not available
- Equivalent TPI
- 12.7
M16 × 2
- Major diameter
- 16 mm
- Pitch
- 2 mm
- Series
- Coarse
More dimensions
- Supplier starting drill
- 14 mm
- Medium clearance
- 17.5 mm
- Fine clearance
- 17 mm
- Equivalent TPI
- 12.7
M20 × 2.5
- Major diameter
- 20 mm
- Pitch
- 2.5 mm
- Series
- Coarse
More dimensions
- Supplier starting drill
- 17.5 mm
- Medium clearance
- 22 mm
- Fine clearance
- 21 mm
- Equivalent TPI
- 10.16
How to use this data
Identify diameter and pitch together. Inch display is a dimensional conversion; it does not convert a metric thread into a Unified thread. Tap-drill and clearance values are independently sourced joins.
- Major diameter is nominal; pitch variants are separate designations.
- Supplier starting drills apply to cutting taps. Missing fine-pitch recommendations are not extrapolated.
CHECK THE METHOD
Worked example
M8 × 1.25 coarse: nominal major diameter 8 mm, pitch 1.25 mm, supplier cutting-drill start 6.8 mm and medium clearance 9 mm.
Continue the reference workflow
Common lookup questions
Does M8 always mean a 1.25 mm pitch?
That is the coarse variant shown here. M8×1 is a separate fine thread; measure pitch before choosing a mating component.
TRACEABLE DATA
Sources, scope & verification
Dataset v1.1.0
Last verified:
Selected common M3–M20 coarse and six fine pitch variants. Missing supplier drills/clearances remain unavailable.
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 pitch product reference ↗
Type C · 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.
Accu ISO Metric Thread Dimensions ↗
Type C · ACCU · 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.
Accu YG-1 M8×1 TD844376 cutting-tap product ↗
Type C · ACCU · Product TD844376, public specification
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.
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.
OSG Pocket Decimal Chart ↗
Type C · OSG · 2022 / reprint 2024
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
- 637e1ed97a66b130f38df82d36399410f3bc2bf85e07cfd96e9d5e908df3acc3