BenchReference / Drill sizes / 2.6 mm 2.6 mm Drill Decimal inches 0.1024″
Millimeters 2.6 mm
System Metric
Nearest equivalents in other systems System Nearest drill Size Difference Fractional inch 7/64″ 0.1094″ / 2.778 mm +0.178 mm (+0.0070″)
Number (wire gauge) #38 0.1015″ / 2.578 mm −0.022 mm (−0.0009″)
Letter A 0.2340″ / 5.944 mm +3.344 mm (+0.1316″)
−0.208 mm +0.208 mm 2.6 mm 2.4 mm −0.2 mm 2.5 mm −0.1 mm 2.7 mm +0.1 mm 2.8 mm +0.2 mm #38 −0.022 mm 7/64″ +0.178 mm A +3.344 mm → tick position = true diameter · metric neighbors above, equivalents below · window ±0.21 mm
Positive difference = cuts a slightly larger hole than 2.6 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 2.6 mm 2.4 mm 0.0945 2.4 −0.2 mm 2.5 mm 0.0984 2.5 −0.1 mm 2.6 mm 0.1024 2.6 — 2.7 mm 0.1063 2.7 +0.1 mm 2.8 mm 0.1102 2.8 +0.2 mm
← 2.5 mm (smaller) 2.7 mm (larger) →
Compare 2.6 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 2.6 mm. See all data sources .