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  1. Letter Drill Sizes - LittleMachineShop.com

  2. Machinist Drill Bit Size Table | Drill Bit Size Chart | ISO Metric ...

  3. R Drill Bits | McMaster-Carr

  4. Amazon.com: Size R Drill Bit

    Century Drill & Tool 11618 Letter Gauge Drill Bit, Size R
    Price : $7.59$7.59 · Customer Rating : 4.5 out of 5 stars(325) · Sold By : Amazon.com
    Drill America DWDNRP6 R High Speed Steel Black Oxide Drill Bit (Pack of 6), DWDN Series
    Finish Type : Black Oxide · Cutting Diameter : 0.34 Inches · Material : High Speed Steel
    MAXTOOL Letter R 2pcs Identical Jobber Length Drills Dia 0.339" HSS M2 Twist Drill Bits F…
    MAXTOOL Letter R 2pcs Identical Jobber Length Drills Dia 0.339" HSS M2 Twist Drill Bits F…
  5. Drill Sizes & Decimal Equivalents - Armstrong Metalcrafts

    124 rows · Drill Size & Decimal Equivalents. Fract Size Decimal Inches # Size Letter Size Metric Size Fract Size Decimal Inches # Size Letter Size Metric Size ... R 0.043 57 11/32 0.3438 0.0465 56 0.3445 8.75 3/64 0.0469 ...

  6. Century Drill & Tool 11618 Letter Gauge Drill Bit, Size R

  7. Drill Size Chart - Machining - CustomPart.Net

    The drill size chart contains tools up to 1.5 inches in diameter, but larger tools are also commonly used. Drill size chart for machining. Filter by fractional, wire gauge, letter, and metric.

  8. NPT Tap Drill Chart - DrillsandCutters.com