BenchReference

#26 Drill Bit

Decimal inches 0.1470″
Millimeters 3.734 mm
System Number (wire gauge)

Nearest equivalents in other systems

System Nearest drill Size Difference
Metric 3.7 mm 0.1457″ / 3.7 mm −0.034 mm (−0.0013″)
Fractional inch 9/64″ 0.1406″ / 3.572 mm −0.162 mm (−0.0064″)
Letter A 0.2340″ / 5.944 mm +2.21 mm (+0.0870″)
−0.299 mm+0.299 mm#26#28−0.165 mm#27−0.076 mm#25+0.063 mm#24+0.127 mm9/64″−0.162 mm3.7 mm−0.034 mmA +2.21 mm →tick position = true diameter · number neighbors above, equivalents below · window ±0.3 mm
Positive difference = cuts a slightly larger hole than #26. Sizes beyond the window are listed with arrows — they are not close substitutes.

Neighboring number sizes

Drill Decimal in mm vs #26
#28 0.1405 3.569 −0.165 mm
#27 0.1440 3.658 −0.076 mm
#26 0.1470 3.734 —
#25 0.1495 3.797 +0.063 mm
#24 0.1520 3.861 +0.127 mm
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 number size is 0.1470″. See all data sources.