BenchReference / Drill sizes / 19 mm 19 mm Drill Decimal inches 0.7480″
Millimeters 19 mm
System Metric
Nearest equivalents in other systems System Nearest drill Size Difference Fractional inch 3/4″ 0.7500″ / 19.05 mm +0.05 mm (+0.0020″)
Number (wire gauge) #1 0.2280″ / 5.791 mm −13.209 mm (−0.5200″)
Letter Z 0.4130″ / 10.49 mm −8.51 mm (−0.3350″)
−1.52 mm +1.52 mm 19 mm 18 mm −1 mm 18.5 mm −0.5 mm 19.5 mm +0.5 mm 20 mm +1 mm 3/4″ +0.05 mm ← #1 −13.209 mm ← Z −8.51 mm tick position = true diameter · metric neighbors above, equivalents below · window ±1.52 mm
Positive difference = cuts a slightly larger hole than 19 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 19 mm 18 mm 0.7087 18 −1 mm 18.5 mm 0.7283 18.5 −0.5 mm 19 mm 0.7480 19 — 19.5 mm 0.7677 19.5 +0.5 mm 20 mm 0.7874 20 +1 mm
← 18.5 mm (smaller) 19.5 mm (larger) →
Compare 19 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 19 mm. See all data sources .