BenchReference / Drill sizes / 7.4 mm 7.4 mm Drill Decimal inches 0.2913″
Millimeters 7.4 mm
System Metric
Nearest equivalents in other systems System Nearest drill Size Difference Fractional inch 19/64″ 0.2969″ / 7.541 mm +0.141 mm (+0.0055″)
Number (wire gauge) #1 0.2280″ / 5.791 mm −1.609 mm (−0.0633″)
Letter L 0.2900″ / 7.366 mm −0.034 mm (−0.0013″)
−0.592 mm +0.592 mm 7.4 mm 7.2 mm −0.2 mm 7.3 mm −0.1 mm 7.5 mm +0.1 mm 7.6 mm +0.2 mm L −0.034 mm 19/64″ +0.141 mm ← #1 −1.609 mm tick position = true diameter · metric neighbors above, equivalents below · window ±0.59 mm
Positive difference = cuts a slightly larger hole than 7.4 mm. Sizes
beyond the window are listed with arrows — they are not close substitutes.
Neighboring metric sizes Drill Decimal in mm vs 7.4 mm 7.2 mm 0.2835 7.2 −0.2 mm 7.3 mm 0.2874 7.3 −0.1 mm 7.4 mm 0.2913 7.4 — 7.5 mm 0.2953 7.5 +0.1 mm 7.6 mm 0.2992 7.6 +0.2 mm
← 7.3 mm (smaller) 7.5 mm (larger) →
Compare 7.4 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 7.4 mm. See all data sources .