BenchReference / Drill sizes / 6 mm 6 mm Drill Decimal inches 0.2362″
Millimeters 6 mm
System Metric
Nearest equivalents in other systems System Nearest drill Size Difference Fractional inch 15/64″ 0.2344″ / 5.953 mm −0.047 mm (−0.0018″)
Number (wire gauge) #1 0.2280″ / 5.791 mm −0.209 mm (−0.0082″)
Letter B 0.2380″ / 6.045 mm +0.045 mm (+0.0018″)
−0.48 mm +0.48 mm 6 mm 5.8 mm −0.2 mm 5.9 mm −0.1 mm 6.1 mm +0.1 mm 6.2 mm +0.2 mm #1 −0.209 mm 15/64″ −0.047 mm B +0.045 mm tick position = true diameter · metric neighbors above, equivalents below · window ±0.48 mm
Positive difference = cuts a slightly larger hole than 6 mm. Sizes
beyond the window are listed with arrows — they are not close substitutes.
Neighboring metric sizes Drill Decimal in mm vs 6 mm 5.8 mm 0.2283 5.8 −0.2 mm 5.9 mm 0.2323 5.9 −0.1 mm 6 mm 0.2362 6 — 6.1 mm 0.2402 6.1 +0.1 mm 6.2 mm 0.2441 6.2 +0.2 mm
← 5.9 mm (smaller) 6.1 mm (larger) →
Compare 6 mm with another size
Data provenance. ASME B94.11M, Twist Drills (standard drill size series) (ASME). Millimeter and inch values are converted with the exact definition 1 in = 25.4 mm; the canonical dimension for this metric size is 6 mm. See all data sources .