Tapping Drill Sizes

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Tapping Drill Sizes - Metric / US Computer Services METRIC COARSE Sizes METRIC FINE Sizes NATIONAL COARSE (UNC) Metric NATIONAL FINE (UNF) Metric TAP size Drill size TAP size Drill size TAP size Drill size Equivalents TAP size Drill size Equivalents 1 x 0 .25 0 .75 4 x .35 No. 1 x 64 No. 53 No. 0 x 80 3/64" x 0 .85 4 x .5 No. 2 x 56 No. 51 No. 1 x 72 No. 53 x 0 .95 5 x .5 No. 3 x 48 5/64" 2 No. 2 x 64 No. 50 x 6 x .5 No. 4 x 40 No. 43 No. 3 x 56 No. 46 x 6 x .75 No. 5 x 40 No. 39 No. 4 x 48 No. 42 x 7 x .75 No. 6 x 32 No. 36 No. 5 x 44 No. 37 x 8 x .5 No. 8 x 32 No. 29 No. 6 x 40 No. 33 2 x 8 x .75 No. 10 x 24 No. 25 No. 8 x 36 No. 29 x 8x1 7 No. 12 x 24 No. 17 No. 10 x 32 No. 21 4. x 9x1 8 1/4 x 20 No. 7 No. 12 x 28 No. 15 3 x 10 x .75 5/16 x 18 F (Letter) 1/4 x 28 No. 3 x 10 x 1 9 3/8 x 16 5/16" 5/16 x 24 I (Letter) 4 x 10 x 7/16 x 14 U (Letter) 3/8 x 24 Q (Letter) x 11 x 1 10 1/2 x 13 27/64" 7/16 x 20 W (Letter) 5 x 12 x .75 9/16 x 12 31/64" 1/2 x 20 29/64 6x1 5 12 x 1 11 5/8 x 11 17/32" 9/16 x 18 33/64 7x1 6 12 x 3/4 x 10 21/32" 5/8 x 18 37/64 8 x 14 x 1 13 7/8 x 9 49/64" 3/4 x 16 11/16 9 x 14 x 1" x 8 7/8" 7/8 x 14 13/16 10 x 14 x 1-1/8 x 7 63/64" 25 1" x 14 15/16 11 x 16 x 1 15 1-1/4 x 7 1-7/64" 1-1/8 x 12 1-3/64 12 x 16 x 1-1/2 x 6 1-11/32" 1-1/4 x 12 1-11/64 14 x 2 12 18 x 1 17 1-3/4 x 5 1-35/64" 1-1/2 x 12 1-27/64 16 x 2 14 18 x 2 16 2" x 4-1/2 1-25/32" 1-3/4 x 12 1-43/64 18 x 20 x

tap size drill size tap size drill size tap size drill size tap size drill size 1 x 0 .25 0 .75 4 x .35 3.6 No. 1 x 64 No. 53 1.5 No. 0 x 80 3/64" 1.2 1.1 x 0.25 0 .85 4 x .5 3.5 No. 2 x 56 No. 51 1.7 No. 1 x 72 No. 53 1.5

  Size, Drill, Size drill size