BenchReference / Drill sizes / 5.6 mm 5.6 mm Drill Decimal inches 0.2205″
Millimeters 5.6 mm
System Metric
Nearest equivalents in other systems System Nearest drill Size Difference Fractional inch 7/32″ 0.2188″ / 5.556 mm −0.044 mm (−0.0017″)
Number (wire gauge) #2 0.2210″ / 5.613 mm +0.013 mm (+0.0005″)
Letter A 0.2340″ / 5.944 mm +0.344 mm (+0.0135″)
−0.448 mm +0.448 mm 5.6 mm 5.4 mm −0.2 mm 5.5 mm −0.1 mm 5.7 mm +0.1 mm 5.8 mm +0.2 mm 7/32″ −0.044 mm #2 +0.013 mm A +0.344 mm tick position = true diameter · metric neighbors above, equivalents below · window ±0.45 mm
Positive difference = cuts a slightly larger hole than 5.6 mm. Sizes
beyond the window are listed with arrows — they are not close substitutes.
Neighboring metric sizes Drill Decimal in mm vs 5.6 mm 5.4 mm 0.2126 5.4 −0.2 mm 5.5 mm 0.2165 5.5 −0.1 mm 5.6 mm 0.2205 5.6 — 5.7 mm 0.2244 5.7 +0.1 mm 5.8 mm 0.2283 5.8 +0.2 mm
← 5.5 mm (smaller) 5.7 mm (larger) →
Compare 5.6 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 5.6 mm. See all data sources .