BenchReference / Drill sizes / 1.9 mm 1.9 mm Drill Decimal inches 0.0748″
Millimeters 1.9 mm
System Metric
Nearest equivalents in other systems System Nearest drill Size Difference Fractional inch 5/64″ 0.0781″ / 1.984 mm +0.084 mm (+0.0033″)
Number (wire gauge) #48 0.0760″ / 1.93 mm +0.03 mm (+0.0012″)
Letter A 0.2340″ / 5.944 mm +4.044 mm (+0.1592″)
−0.152 mm +0.152 mm 1.9 mm 1.8 mm −0.1 mm 2 mm +0.1 mm 2.05 mm +0.15 mm #48 +0.03 mm 5/64″ +0.084 mm ← 1.7 mm −0.2 mm A +4.044 mm → tick position = true diameter · metric neighbors above, equivalents below · window ±0.15 mm
Positive difference = cuts a slightly larger hole than 1.9 mm. Sizes
beyond the window are listed with arrows — they are not close substitutes.
Neighboring metric sizes Drill Decimal in mm vs 1.9 mm 1.7 mm 0.0669 1.7 −0.2 mm 1.8 mm 0.0709 1.8 −0.1 mm 1.9 mm 0.0748 1.9 — 2 mm 0.0787 2 +0.1 mm 2.05 mm 0.0807 2.05 +0.15 mm
← 1.8 mm (smaller) 2 mm (larger) →
Compare 1.9 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 1.9 mm. See all data sources .