BenchReference / Drill sizes / 19/64″ 19/64″ Drill Bit Decimal inches 0.2969″
Millimeters 7.541 mm
System Fractional inch
Nearest equivalents in other systems System Nearest drill Size Difference Metric 7.5 mm 0.2953″ / 7.5 mm −0.041 mm (−0.0016″)
Number (wire gauge) #1 0.2280″ / 5.791 mm −1.749 mm (−0.0689″)
Letter M 0.2950″ / 7.493 mm −0.048 mm (−0.0019″)
−0.603 mm +0.603 mm 19/64″ 9/32″ −0.397 mm 5/16″ +0.397 mm M −0.048 mm 7.5 mm −0.041 mm ← 17/64″ −0.794 mm ← #1 −1.749 mm 21/64″ +0.794 mm → tick position = true diameter · fractional neighbors above, equivalents below · window ±0.6 mm
Positive difference = cuts a slightly larger hole than 19/64″. Sizes
beyond the window are listed with arrows — they are not close substitutes.
Clearance drill for Neighboring fractional sizes Drill Decimal in mm vs 19/64″ 17/64″ 0.2656 6.747 −0.794 mm 9/32″ 0.2813 7.144 −0.397 mm 19/64″ 0.2969 7.541 — 5/16″ 0.3125 7.938 +0.397 mm 21/64″ 0.3281 8.334 +0.794 mm
← 9/32″ (smaller) 5/16″ (larger) →
Compare 19/64″ 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 fractional size is 0.2969″. See all data sources .