BenchReference

14.5 mm Drill

Decimal inches 0.5709″
Millimeters 14.5 mm
System Metric

Nearest equivalents in other systems

System Nearest drill Size Difference
Fractional inch 37/64″ 0.5781″ / 14.684 mm +0.184 mm (+0.0073″)
Number (wire gauge) #1 0.2280″ / 5.791 mm −8.709 mm (−0.3429″)
Letter Z 0.4130″ / 10.49 mm −4.01 mm (−0.1579″)
−1.16 mm+1.16 mm14.5 mm13.5 mm−1 mm14 mm−0.5 mm15 mm+0.5 mm15.5 mm+1 mm37/64″+0.184 mm← #1 −8.709 mm← Z −4.01 mmtick position = true diameter · metric neighbors above, equivalents below · window ±1.16 mm
Positive difference = cuts a slightly larger hole than 14.5 mm. Sizes beyond the window are listed with arrows — they are not close substitutes.

Tap drill for

Thread Major diameter Pitch
M16 × 1.5 0.6299″ / 16 mm 1.5 mm

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

Clearance drill for

Thread Fit
M12 × 1.75 loose
M12 × 1.25 loose
M12 × 1.5 loose

Neighboring metric sizes

Drill Decimal in mm vs 14.5 mm
13.5 mm 0.5315 13.5 −1 mm
14 mm 0.5512 14 −0.5 mm
14.5 mm 0.5709 14.5 —
15 mm 0.5906 15 +0.5 mm
15.5 mm 0.6102 15.5 +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 14.5 mm. See all data sources.