BenchReference / Drill sizes / 5.9 mm 5.9 mm Drill Decimal inches 0.2323″
Millimeters 5.9 mm
System Metric
Nearest equivalents in other systems System Nearest drill Size Difference Fractional inch 15/64″ 0.2344″ / 5.953 mm +0.053 mm (+0.0021″)
Number (wire gauge) #1 0.2280″ / 5.791 mm −0.109 mm (−0.0043″)
Letter A 0.2340″ / 5.944 mm +0.044 mm (+0.0017″)
−0.472 mm +0.472 mm 5.9 mm 5.7 mm −0.2 mm 5.8 mm −0.1 mm 6 mm +0.1 mm 6.1 mm +0.2 mm #1 −0.109 mm A +0.044 mm 15/64″ +0.053 mm tick position = true diameter · metric neighbors above, equivalents below · window ±0.47 mm
Positive difference = cuts a slightly larger hole than 5.9 mm. Sizes
beyond the window are listed with arrows — they are not close substitutes.
Neighboring metric sizes Drill Decimal in mm vs 5.9 mm 5.7 mm 0.2244 5.7 −0.2 mm 5.8 mm 0.2283 5.8 −0.1 mm 5.9 mm 0.2323 5.9 — 6 mm 0.2362 6 +0.1 mm 6.1 mm 0.2402 6.1 +0.2 mm
← 5.8 mm (smaller) 6 mm (larger) →
Compare 5.9 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 5.9 mm. See all data sources .