0.5 mm
- Diameter
- 0.5 mm
- Drill family
- Metric
VALICALC · TECHNICAL REFERENCE
Drill Bit Size Chart
Find a drill's diameter or compare nearby sizes across drill families. Exact designation matches and nearest numeric candidates are shown separately.
LOOK UP & COMPARE
Search within the verified subset. Numeric sizes match complete designations; a nearby size is a candidate, not an exact match.
Find nearby sizes from measured dimensions
Dimensions below use millimetres. Results are identification candidates within this subset.
SELECTED REFERENCE
#7
- Diameter
- 5.105 mm
- Drill family
- Number
All fields & cell provenance
- Drill designation: OSG Pocket Decimal Chart — Decimal equivalents / #7 · verified 2026-10-06 · source value #7.
- Diameter: OSG Pocket Decimal Chart — Decimal equivalents / #7 · verified 2026-10-06 · source value 0.201 in.
- Drill family: OSG Pocket Decimal Chart — Decimal equivalents / #7 · verified 2026-10-06 · source value Number.
v1.1.0 · verified 2026-10-06
#75.105 mmBack to answer ↑
Explore the verified data
67 matching rows · 67 in this subset
| Drill designation | Diameter | Drill family | Actions |
|---|---|---|---|
| 0.5 mm | 0.5 mm | Metric | |
| 1/32 in | 0.794 mm | Fractional | |
| 1 mm | 1 mm | Metric | |
| 1.5 mm | 1.5 mm | Metric | |
| 1/16 in | 1.588 mm | Fractional | |
| 2 mm | 2 mm | Metric | |
| #43 | 2.261 mm | Number | |
| 3/32 in | 2.381 mm | Fractional | |
| 2.5 mm | 2.5 mm | Metric | |
| #36 | 2.705 mm | Number | |
| 3 mm | 3 mm | Metric | |
| 1/8 in | 3.175 mm | Fractional | |
| 3.3 mm | 3.3 mm | Metric | |
| #29 | 3.454 mm | Number | |
| #25 | 3.797 mm | Number | |
| 5/32 in | 3.969 mm | Fractional | |
| 4 mm | 4 mm | Metric | |
| #21 | 4.039 mm | Number | |
| 4.2 mm | 4.2 mm | Metric | |
| 3/16 in | 4.762 mm | Fractional |
1/32 in
- Diameter
- 0.794 mm
- Drill family
- Fractional
1 mm
- Diameter
- 1 mm
- Drill family
- Metric
1.5 mm
- Diameter
- 1.5 mm
- Drill family
- Metric
1/16 in
- Diameter
- 1.588 mm
- Drill family
- Fractional
2 mm
- Diameter
- 2 mm
- Drill family
- Metric
#43
- Diameter
- 2.261 mm
- Drill family
- Number
3/32 in
- Diameter
- 2.381 mm
- Drill family
- Fractional
2.5 mm
- Diameter
- 2.5 mm
- Drill family
- Metric
#36
- Diameter
- 2.705 mm
- Drill family
- Number
3 mm
- Diameter
- 3 mm
- Drill family
- Metric
1/8 in
- Diameter
- 3.175 mm
- Drill family
- Fractional
3.3 mm
- Diameter
- 3.3 mm
- Drill family
- Metric
#29
- Diameter
- 3.454 mm
- Drill family
- Number
#25
- Diameter
- 3.797 mm
- Drill family
- Number
5/32 in
- Diameter
- 3.969 mm
- Drill family
- Fractional
4 mm
- Diameter
- 4 mm
- Drill family
- Metric
#21
- Diameter
- 4.039 mm
- Drill family
- Number
4.2 mm
- Diameter
- 4.2 mm
- Drill family
- Metric
3/16 in
- Diameter
- 4.762 mm
- Drill family
- Fractional
How to use this data
Fractions convert exactly via 25.4 mm/in. Letter/number nominal dimensions come from selected supplier facts. Nearest-size candidates show smaller/larger differences.
- Nearest diameter means geometry only, not an approved tapping choice.
CHECK THE METHOD
Worked example
1/4 in is exactly 6.35 mm. LetterF is 0.2570 in (6.5278 mm), so it is not a 1/4 in equivalent.
Continue the reference workflow
Common lookup questions
Are letter/number drill sizes a uniform series?
No. Their published nominal dimensions must be looked up; only unit conversion is calculated.
TRACEABLE DATA
Sources, scope & verification
Dataset v1.1.0
Last verified:
Authored 1/32–1 in fractional/metric comparisons plus 14 selected letter/number drills. Fractional increments are generated; letter/number dimensions are sourced.
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.
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