BenchReference / Drill sizes / 11.7 mm 11.7 mm Drill Decimal inches 0.4606″
Millimeters 11.7 mm
System Metric
Nearest equivalents in other systems System Nearest drill Size Difference Fractional inch 29/64″ 0.4531″ / 11.509 mm −0.191 mm (−0.0075″)
Number (wire gauge) #1 0.2280″ / 5.791 mm −5.909 mm (−0.2326″)
Letter Z 0.4130″ / 10.49 mm −1.21 mm (−0.0476″)
−0.936 mm +0.936 mm 11.7 mm 11.5 mm −0.2 mm 11.6 mm −0.1 mm 11.8 mm +0.1 mm 11.9 mm +0.2 mm 29/64″ −0.191 mm ← #1 −5.909 mm ← Z −1.21 mm tick position = true diameter · metric neighbors above, equivalents below · window ±0.94 mm
Positive difference = cuts a slightly larger hole than 11.7 mm. Sizes
beyond the window are listed with arrows — they are not close substitutes.
Neighboring metric sizes Drill Decimal in mm vs 11.7 mm 11.5 mm 0.4528 11.5 −0.2 mm 11.6 mm 0.4567 11.6 −0.1 mm 11.7 mm 0.4606 11.7 — 11.8 mm 0.4646 11.8 +0.1 mm 11.9 mm 0.4685 11.9 +0.2 mm
← 11.6 mm (smaller) 11.8 mm (larger) →
Compare 11.7 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 11.7 mm. See all data sources .