BenchReference

#44 Drill Bit

Decimal inches 0.0860″
Millimeters 2.184 mm
System Number (wire gauge)

Nearest equivalents in other systems

System Nearest drill Size Difference
Metric 2.2 mm 0.0866″ / 2.2 mm +0.016 mm (+0.0006″)
Fractional inch 3/32″ 0.0938″ / 2.381 mm +0.197 mm (+0.0077″)
Letter A 0.2340″ / 5.944 mm +3.759 mm (+0.1480″)
−0.175 mm+0.175 mm#44#46−0.127 mm#45−0.102 mm#43+0.076 mm2.2 mm+0.016 mm#42 +0.191 mm →3/32″ +0.197 mm →tick position = true diameter · number neighbors above, equivalents below · window ±0.17 mm
Positive difference = cuts a slightly larger hole than #44. Sizes beyond the window are listed with arrows — they are not close substitutes.

Neighboring number sizes

Drill Decimal in mm vs #44
#46 0.0810 2.057 −0.127 mm
#45 0.0820 2.083 −0.102 mm
#44 0.0860 2.184 —
#43 0.0890 2.261 +0.076 mm
#42 0.0935 2.375 +0.191 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 0.0860″. See all data sources.