BenchReference

14 mm Drill

Decimal inches 0.5512″
Millimeters 14 mm
System Metric

Nearest equivalents in other systems

System Nearest drill Size Difference
Fractional inch 35/64″ 0.5469″ / 13.891 mm −0.109 mm (−0.0043″)
Number (wire gauge) #1 0.2280″ / 5.791 mm −8.209 mm (−0.3232″)
Letter Z 0.4130″ / 10.49 mm −3.51 mm (−0.1382″)
−1.12 mm+1.12 mm14 mm13 mm−1 mm13.5 mm−0.5 mm14.5 mm+0.5 mm15 mm+1 mm35/64″−0.109 mm← #1 −8.209 mm← Z −3.51 mmtick position = true diameter · metric neighbors above, equivalents below · window ±1.12 mm
Positive difference = cuts a slightly larger hole than 14 mm. Sizes beyond the window are listed with arrows — they are not close substitutes.

Tap drill for

Thread Major diameter Pitch
M16 × 2 0.6299″ / 16 mm 2 mm

The standard chart recommendation (≈75% thread engagement). Application-specific factors — material, hole depth, tap type — can justify a different drill.

Neighboring metric sizes

Drill Decimal in mm vs 14 mm
13 mm 0.5118 13 −1 mm
13.5 mm 0.5315 13.5 −0.5 mm
14 mm 0.5512 14 —
14.5 mm 0.5709 14.5 +0.5 mm
15 mm 0.5906 15 +1 mm
Data provenance. ASME B94.11M, Twist Drills (standard drill size series) (ASME). Machinery’s Handbook — tap drill charts (Industrial Press). Millimeter and inch values are converted with the exact definition 1 in = 25.4 mm; the canonical dimension for this metric size is 14 mm. See all data sources.