Transcription of Tap & Drill Chart
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
2 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 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).
3 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.
4 39/64 5/8. M17 45/64 47/64. 39/64 41/64. 5/8 21/32. 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.
