BenchReference / Drill sizes / 10.7 mm 10.7 mm Drill Decimal inches 0.4213″
Millimeters 10.7 mm
System Metric
Nearest equivalents in other systems System Nearest drill Size Difference Fractional inch 27/64″ 0.4219″ / 10.716 mm +0.016 mm (+0.0006″)
Number (wire gauge) #1 0.2280″ / 5.791 mm −4.909 mm (−0.1933″)
Letter Z 0.4130″ / 10.49 mm −0.21 mm (−0.0083″)
−0.856 mm +0.856 mm 10.7 mm 10.5 mm −0.2 mm 10.6 mm −0.1 mm 10.8 mm +0.1 mm 10.9 mm +0.2 mm Z −0.21 mm 27/64″ +0.016 mm ← #1 −4.909 mm tick position = true diameter · metric neighbors above, equivalents below · window ±0.86 mm
Positive difference = cuts a slightly larger hole than 10.7 mm. Sizes
beyond the window are listed with arrows — they are not close substitutes.
Neighboring metric sizes Drill Decimal in mm vs 10.7 mm 10.5 mm 0.4134 10.5 −0.2 mm 10.6 mm 0.4173 10.6 −0.1 mm 10.7 mm 0.4213 10.7 — 10.8 mm 0.4252 10.8 +0.1 mm 10.9 mm 0.4291 10.9 +0.2 mm
← 10.6 mm (smaller) 10.8 mm (larger) →
Compare 10.7 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 10.7 mm. See all data sources .