| Screw Size | Pitch | Tap Drill | Clearance Hole Diameter | Counterbore | Screw Head Countersink | ||||||
| Tight Fit | Normal Fit | C-sink | |||||||||
| Metric Drill | English Drill | Metric Drill | English Drill | Metric Drill | English Drill | (minimum) | Diameter | Depth | Diameter | ||
| M 1 | 0.25 | 0.75 | .0295 | 1.05 | 0.0413 | 1.20 | 0.0472 | 1.20 | N/A | N/A | N/A |
| M 1.2 | 0.25 | 0.95 | .0374 | 1.30 | 0.0512 | 1.50 | 0.0590 | 1.50 | N/A | N/A | N/A |
| M 1.4 | 0.3 | 1.1 | .0433 | 1.50 | 0.0591 | 1.70 | 0.0669 | 1.70 | 3.10 | 1.40 | N/A |
| M 1.6 | 0.35 | 1.25 | #55(.052) | 1.70 | #50(.070) | 1.95 | #48(.076) | 2.00 | 3.50 | 1.70 | N/A |
| M 1.8 | 0.35 | 1.45 | #53(.057) | 1.90 | #49(.073) | 2.20 | #44(.086) | 2.30 | N/A | N/A | N/A |
| M 2 | 0.4 | 1.6 | #52(.063) | 2.20 | #44(.086) | 2.40 | #41(.096) | 2.60 | 4.40 | 2.00 | N/A |
| M 2.5 | 0.45 | 2.05 | .0807 | 2.70 | #36(.1065) | 3.00 | #31(.120) | 3.10 | 5.40 | 2.50 | N/A |
| M 3 | 0.5 | 2.5 | #39(.0995) | 3.40 | #29(.136) | 3.70 | #26(.147) | 3.60 | 6.50 | 3.00 | 6 |
| M 3.5 | 0.6 | 2.9 | #32(.116) | 3.70 | #27(.144) | 4.20 | #19(.166) | 4.10 | N/A | N/A | 8 |
| M 4 | 0.7 | 3.3 | #29(.136) | 4.40 | #17(.173) | 4.80 | #12(.189) | 4.70 | 8.25 | 4.00 | 10 |
| M 5 | 0.8 | 4.2 | #18(.169) | 5.40 | #3(.213) | 5.80 | #1(.228) | 5.70 | 9.75 | 5.00 | 12 |
| M 6 | 1 | 5 | #8(.199) | 6.40 | 1/4(.250) | 6.80 | "H"(.266) | 6.80 | 11.20 | 6.00 | 16 |
| M 7 | 1 | 6 | "B"(.238) | 7.40 | "L"(.290) | 7.80 | 5/16(.3125) | 7.80 | N/A | N/A | ?? |
| M 8 | 1 | 7.0 | "J"(.277) | 8.40 | 21/64(.328) | 8.80 | "S"(.348) | 9.20 | 14.50 | 8.00 | 12 |
| 1.25 | 6.8 | "I"(.272) | |||||||||
| M 10 | 1 | 9 | 10.50 | "Z"(.413) | 10.80 | 7/16(.4375) | 11.20 | 17.50 | 10.00 | 20 | |
| 1.25 | 8.8 | "S"(.348) | |||||||||
| 1.5 | 8.5 | "K"(.399) | |||||||||
| M 12 | 1.25 | 27/64(.421) | 12.50 | 31/64(0.484) | 13.00 | 33/64(.516) | 14.20 | 19.50 | 12.00 | 24 | |
| 1.5 | 10.5 | ||||||||||
| 1.75 | 10.2 | 13/32(.406) | |||||||||
| M 14 | 1.5 | 12.5 | 1/2(.500) | 14.50 | 9/16(.562) | 15.00 | 41/64(.640) | 16.20 | 22.50 | 14.00 | 27 |
| 2 | 12 | 31/64(.484) | |||||||||
| M 16 | 1.5 | 14.5 | 37/64(.578) | 16.50 | 41/64(.640) | 17.00 | 43/64(.672) | 18.20 | 25.50 | 16.00 | 30 |
| 2 | 14 | 9/16(.562) | |||||||||
| M 18 | 1.5 | 21/32(.656) | 18.50 | 23/32(.718) | 19.00 | 3/4(.750) | N/A | N/A | N/A | 33 | |
| 2 | 16 | ||||||||||
| 2.5 | 15.5 | 5/8(.625) | |||||||||
| M 20 | 1.5 | 18.5 | 47/64(.703) | 20.50 | 13/16(.812) | 21.00 | 53/64(.818) | 22.40 | 31.50 | 20.00 | 36 |
| 2 | 18 | ||||||||||
| 2.5 | 17.5 | 45/64(.703) | |||||||||
| M 22 | 1.5 | 20.5 | 22.50 | 57/64(.891) | 23.00 | 29/32(.906) | N/A | N/A | N/A | N/A | |
| 2.0 | 20 | ||||||||||
| 2.5 | 19.5 | ||||||||||
| M 24 | 2 | 22 | 24.50 | 31/32(.969) | 25.00 | 63/64(0.984) | 26.40 | 37.50 | 24.00 | N/A | |
| 3 | 21 | ||||||||||
| M 27 | 2 | 25 | 28.00 | 1-7/64(1.109) | 28.50 | 1-1/8(1.125) | N/A | N/A | N/A | N/A | |
| 3 | 24 | ||||||||||
| M 30 | 2 | 28 | 31.00 | 1-7/32(1.219) | 31.50 | 1-1/4(1.250) | 33.4 | 47.50 | 30.00 | N/A | |
| 3.5 | 26.5 | ||||||||||
| M 33 | 2 | 31 | 34.00 | 1-11/32(1.344) | 34.50 | 1-3/8(1.375) | N/A | N/A | N/A | N/A | |
| 3.5 | 29.5 | ||||||||||
| M 36 | 3 | 33 | 37.00 | 1-15/32(1.469) | 37.50 | 1-1/2(1.500) | 39.4 | 56.50 | 36.00 | N/A | |
| 4 | 32 | ||||||||||
| M 39 | 3 | 36 | 40.00 | 1-9/16(1.563) | 41.00 | 1-5/8(1.625) | N/A | N/A | N/A | N/A | |
| 4 | 35 | ||||||||||
| M 42 | 3 | 39 | 43.00 | 1-11/16(1.688) | 44.00 | 1-3/4(1.750) | 45.6 | 66.00 | 42.00 | N/A | |
| 4.5 | 37.5 | ||||||||||
| M 45 | 3 | 42 | 46.00 | 1-13/16(1.813) | 47.00 | 1-7/8(1.875) | N/A | N/A | N/A | N/A | |
| 4.5 | 40.5 | ||||||||||
| M 48 | 3 | 45 | 50.00 | 2 | 50.00 | 2 | 52.6 | 75.00 | 28.00 | N/A | |
| 5 | 43 | ||||||||||