Transcription of Tap & Drill Chart - University of Florida
1 Tap & Drill Chart STANDARD. Tap Drill Clearance Drill Tap & Clearance Drill Sizes 75% Thread for 50% Thread for Screw Major Threads Minor Aluminum, Brass Steel, Stainless Close Fit Free Fit size Diameter Per Inch Diameter & Plastics & Iron Drill size Dec. Eq. Drill size Dec. Eq. Drill size Dec. Eq. Drill size Dec. Eq. 0 80 3/64 55 52 50 64 53 1/16 1 48 46 72 53 52 56 50 49 2 43 41 64 50 48 48 47 44 3 37 35 56 45 43 40 43 41 4 32 30 48 42 40 40 38 7/64 5 30 29 44 37 35 32 36 32 6 27 25 40 33 31 32 29 27 8 18 16 36 29 26 24 22 20 10 9 7 32 21 18 24 16 12 12 28 14 10 2 1 32 13 9 20 7 7/32 1/4 28 3 1 F H 32 7/32 1 18 F J 5/16 24 I 9/32 P Q 32 9/32 L 16 5/16 Q 3/8 24 Q S W X 32 11/32 T 14 U 25/64 7/16 20 25/64 13/32 29/64 15/32 28 Y Z 13 27/64 29/64 1/2 20 29/64 15/32 33/64 17/32 28 15/32 15/32 12 31/64 33/64 9/16 18 33/64 17/32 37/64 19/32 24 33/64 17/32 11 17/32 9/16 5/8 18 37/64 19/32 41/64 21/32 24 37/64 19/32 11/16 24 41/64 21/32 45/64 23/32 10 21/32 11/16 3/4 16 11/16 45/64 49/64 25/32 20 45/64 23/32 13/16 20 49/64 25/32 53/64 27/32 9 49/64 51/64 7/8 14 13/16 53/64 57/64 29/32 20 53/64 27/32 15/16 20 57/64 29/32 61/64 31/32 8 7/8 59/64 1 1 12 15/16 61/64 1-1/64 1-1/32 20 61/64 31/32 Tap & Drill Chart
2 METRIC Tap Drill Clearance Drill 75% Thread for 50% Thread for Tap & Clearance Drill Aluminum, Brass Steel, Stainless Close Fit Free Fit Sizes & Plastics & Iron Closest Closest Closest Screw size Thread Pitch Drill size Drill size Drill size Closest Drill size American American American (mm) (mm) (mm) (mm) (mm) American Drill (mm). Drill Drill Drill 56 55 1/16 52. 55 54 51 50. 53 1/16 49 5/64. 1/16 51. M2 45 44. 52 50. 50 48 3/32 41. 46 44 37 7/64. 41 37. M3 1/8 30. 39 36. 32 31 27 24. 30 28. M4 19 17. 30 28. 25 22 13 9. 21 11/64. M5 20 17 5 19 16. 14 10 1 B. 8 4. M6 E G. 4 7/32. B E. M7 L N. D F. H J. M8 Q S. J L. N P. M9 3/8 25/64. O 21/64. R T. M10 11/32 23/64 Z T U. M11 3/8 X 29/64 15/32. 13/32 27/64. M12 Z 7/16 1/2 33/64. 27/64 7/16. 15/32 1/2. M14 1/2 33/64 37/64 39/64. 1/2 33/64. M15 17/32 35/64 5/8 21/32. 35/64 37/64. M16 21/32 37/64 19/32. 39/64 5/8. M17 45/64 47/64. 39/64 41/64. 5/8 21/32.
3 M18 3/4 25/32. 21/32 43/64. 21/32 11/16. M19 25/32 53/64. 11/16 23/32. 45/64 47/64. M20 53/64 55/64. 47/64 3/4.