BenchReference / Drill sizes / 15 mm 15 mm Drill Decimal inches 0.5906″
Millimeters 15 mm
System Metric
Nearest equivalents in other systems System Nearest drill Size Difference Fractional inch 19/32″ 0.5938″ / 15.081 mm +0.081 mm (+0.0032″)
Number (wire gauge) #1 0.2280″ / 5.791 mm −9.209 mm (−0.3626″)
Letter Z 0.4130″ / 10.49 mm −4.51 mm (−0.1776″)
−1.2 mm +1.2 mm 15 mm 14 mm −1 mm 14.5 mm −0.5 mm 15.5 mm +0.5 mm 16 mm +1 mm 19/32″ +0.081 mm ← #1 −9.209 mm ← Z −4.51 mm tick position = true diameter · metric neighbors above, equivalents below · window ±1.2 mm
Positive difference = cuts a slightly larger hole than 15 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 15 mm 14 mm 0.5512 14 −1 mm 14.5 mm 0.5709 14.5 −0.5 mm 15 mm 0.5906 15 — 15.5 mm 0.6102 15.5 +0.5 mm 16 mm 0.6299 16 +1 mm
← 14.5 mm (smaller) 15.5 mm (larger) →
Compare 15 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 15 mm. See all data sources .