BenchReference / Drill sizes / 2 mm 2 mm Drill Decimal inches 0.0787″
Millimeters 2 mm
System Metric
Nearest equivalents in other systems System Nearest drill Size Difference Fractional inch 5/64″ 0.0781″ / 1.984 mm −0.016 mm (−0.0006″)
Number (wire gauge) #47 0.0785″ / 1.994 mm −0.006 mm (−0.0002″)
Letter A 0.2340″ / 5.944 mm +3.944 mm (+0.1553″)
−0.16 mm +0.16 mm 2 mm 1.9 mm −0.1 mm 2.05 mm +0.05 mm 2.1 mm +0.1 mm 5/64″ −0.016 mm #47 −0.006 mm ← 1.8 mm −0.2 mm A +3.944 mm → tick position = true diameter · metric neighbors above, equivalents below · window ±0.16 mm
Positive difference = cuts a slightly larger hole than 2 mm. Sizes
beyond the window are listed with arrows — they are not close substitutes.
Clearance drill for Neighboring metric sizes Drill Decimal in mm vs 2 mm 1.8 mm 0.0709 1.8 −0.2 mm 1.9 mm 0.0748 1.9 −0.1 mm 2 mm 0.0787 2 — 2.05 mm 0.0807 2.05 +0.05 mm 2.1 mm 0.0827 2.1 +0.1 mm
← 1.9 mm (smaller) 2.05 mm (larger) →
Compare 2 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 2 mm. See all data sources .