BenchReference / Drill sizes / 3.6 mm 3.6 mm Drill Decimal inches 0.1417″
Millimeters 3.6 mm
System Metric
Nearest equivalents in other systems System Nearest drill Size Difference Fractional inch 9/64″ 0.1406″ / 3.572 mm −0.028 mm (−0.0011″)
Number (wire gauge) #28 0.1405″ / 3.569 mm −0.031 mm (−0.0012″)
Letter A 0.2340″ / 5.944 mm +2.344 mm (+0.0923″)
−0.288 mm +0.288 mm 3.6 mm 3.4 mm −0.2 mm 3.5 mm −0.1 mm 3.7 mm +0.1 mm 3.8 mm +0.2 mm #28 −0.031 mm 9/64″ −0.028 mm A +2.344 mm → tick position = true diameter · metric neighbors above, equivalents below · window ±0.29 mm
Positive difference = cuts a slightly larger hole than 3.6 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 3.6 mm 3.4 mm 0.1339 3.4 −0.2 mm 3.5 mm 0.1378 3.5 −0.1 mm 3.6 mm 0.1417 3.6 — 3.7 mm 0.1457 3.7 +0.1 mm 3.8 mm 0.1496 3.8 +0.2 mm
← 3.5 mm (smaller) 3.7 mm (larger) →
Compare 3.6 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 3.6 mm. See all data sources .