BenchReference / Drill sizes / V V Drill Bit Decimal inches 0.3770″
Millimeters 9.576 mm
System Letter
Nearest equivalents in other systems System Nearest drill Size Difference Metric 9.6 mm 0.3780″ / 9.6 mm +0.024 mm (+0.0010″)
Fractional inch 3/8″ 0.3750″ / 9.525 mm −0.051 mm (−0.0020″)
Number (wire gauge) #1 0.2280″ / 5.791 mm −3.785 mm (−0.1490″)
−0.766 mm +0.766 mm V T −0.483 mm U −0.229 mm W +0.229 mm X +0.508 mm 3/8″ −0.051 mm 9.6 mm +0.024 mm ← #1 −3.785 mm tick position = true diameter · letter neighbors above, equivalents below · window ±0.77 mm
Positive difference = cuts a slightly larger hole than V. Sizes
beyond the window are listed with arrows — they are not close substitutes.
Neighboring letter sizes Drill Decimal in mm vs V T 0.3580 9.093 −0.483 mm U 0.3680 9.347 −0.229 mm V 0.3770 9.576 — W 0.3860 9.804 +0.229 mm X 0.3970 10.084 +0.508 mm
← U (smaller) W (larger) →
Compare V 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 letter size is 0.3770″. See all data sources .