BenchReference / Drill sizes / 5.4 mm 5.4 mm Drill Decimal inches 0.2126″
Millimeters 5.4 mm
System Metric
Nearest equivalents in other systems System Nearest drill Size Difference Fractional inch 7/32″ 0.2188″ / 5.556 mm +0.156 mm (+0.0062″)
Number (wire gauge) #3 0.2130″ / 5.41 mm +0.01 mm (+0.0004″)
Letter A 0.2340″ / 5.944 mm +0.544 mm (+0.0214″)
−0.432 mm +0.432 mm 5.4 mm 5.2 mm −0.2 mm 5.3 mm −0.1 mm 5.5 mm +0.1 mm 5.6 mm +0.2 mm #3 +0.01 mm 7/32″ +0.156 mm A +0.544 mm → tick position = true diameter · metric neighbors above, equivalents below · window ±0.43 mm
Positive difference = cuts a slightly larger hole than 5.4 mm. Sizes
beyond the window are listed with arrows — they are not close substitutes.
Neighboring metric sizes Drill Decimal in mm vs 5.4 mm 5.2 mm 0.2047 5.2 −0.2 mm 5.3 mm 0.2087 5.3 −0.1 mm 5.4 mm 0.2126 5.4 — 5.5 mm 0.2165 5.5 +0.1 mm 5.6 mm 0.2205 5.6 +0.2 mm
← 5.3 mm (smaller) 5.5 mm (larger) →
Compare 5.4 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 5.4 mm. See all data sources .