
| Re T | commen ap Drill Si | ded ze | Re T | commen ap Drill Si | ded ze | A | meric Coarse | an Unifie Threads | d | A | meric Fine | an Unifie Threads | d |
| Drill | Drill | ||||||||||||
| M | Pitch mm | Size mm | MF | Pitch mm | Size mm | UNC | T.P.I | Max. Core Dia. | Drill Size | UNF | T.P.I | Max. Core Dia | Drill Size |
| 1 | 0.25 | 0.9 | 2.5 | 0.35 | 2.37 | inch | mm | . inch | mm | ||||
| 1.1 | 0.25 | 1 | 2.6 | 0.35 | 2.47 | #1 | 64 | 1.585 | 1.5 | #0 | 80 | 1306 | 13 |
| 1.2 | 0.25 | 1.1 | 3 | 0.35 | 2.88 | . | . | ||||||
| 1.4 | 0.3 | 1.28 | 3.5 | 0.35 | 3.38 | #2 | 56 | 1.872 | 1.8 | #1 | 72 | 1.613 | 1.6 |
| 1.6 | 0.35 | 1.47 | 4 | 0.5 | 3.8 | #3 | 48 | 2.146 | 2.1 | #2 | 64 | 1.913 | 1.9 |
| 1.7 | 0.35 | 1.57 | 5 | 0.5 | 4.8 | #4 | 40 | 2.385 | 2.3 | #3 | 56 | 2.197 | 2.1 |
| 1.8 | 0.35 | 1.67 | 6 | 0.5 | 5.8 | #5 | 40 | 2.697 | 2.6 | #4 | 48 | 2.459 | 2.4 |
| 2 | 0.4 | 1.85 | 6 | 0.75 | 5.7 | #6 | 32 | 2.896 | 2.85 | #5 | 44 | 2.741 | 2.7 |
| 2.2 | 0.45 | 2.03 | 7 | 0.75 | 6.7 | #8 | 32 | 3.528 | 3.5 | #6 | 40 | 3.012 | 3 |
| 2.3 | 0.4 | 2.15 | 8 | 0.75 | 7.7 | #10 | 24 | 3.95 | 3.9 | #8 | 36 | 3.597 | 3.5 |
| 2.5 | 0.45 | 2.33 | 8 | 1 | 7.6 | #12 | 24 | 4.59 | 4.5 | #10 | 32 | 4.168 | 4.1 |
| 2.6 | 0.45 | 2.43 | 9 | 0.75 | 8.7 | 1/4" | 20 | 5.25 | 5.2 | #12 | 28 | 4.717 | 4.7 |
| 3 | 0.5 | 2.8 | 9 | 1 | 8.6 | 5/16" | 18 | 6.68 | 6.6 | 1/4" | 28 | 5.563 | 5.5 |
| 3.5 | 0.6 | 3.25 | 10 | 0.75 | 9.7 | 3/8" | 16 | 8.082 | 8 | 5/16" | 24 | 6.995 | 6.9 |
| 4 | 0.7 | 3.7 | 10 | 1 | 9.6 | 7/16" | 14 | 9441 | 94 | 3/8" | 24 | 8565 | 85 |
| 4.5 | 0.75 | 4.2 | 10 | 1.25 | 9.45 | " | . | . | . | . | |||
| 5 | 0.8 | 4.65 | 11 | 1 | 10.6 | 1/2 | 13 | 10.881 | 10.75 | 7/16" | 20 | 9.947 | 9.9 |
| 6 | 1 | 5.55 | 12 | 1 | 11.6 | 9/16" | 12 | 12.301 | 12.25 | 1/2" | 20 | 11.524 | 11.5 |
| 7 | 1 | 6.55 | 12 | 1.25 | 11.45 | 5/8" | 11 | 13.693 | 13.5 | 9/16" | 18 | 12.969 | 12.9 |
| 8 | 1.25 | 6.6 | 12 | 1.5 | 11.35 | 3/4" | 10 | 16.624 | 16.5 | 5/8" | 18 | 14.554 | 14.5 |
| 9 | 1.25 | 7.45 | 14 | 1 | 13.6 | 7/8" | 9 | 19.52 | 19.5 | 3/4" | 16 | 17.546 | 17.5 |
| 10 | 1.5 | 8.45 | 14 | 1.25 | 13.45 | 1" | 8 | 22.344 | 22.25 | 7/8" | 14 | 20.493 | 20.5 |
| 11 | 1.5 | 9.35 | 14 | 1.5 | 13.35 | 11/8" | 7 | 25.082 | 25 | 1" | 12 | 23.363 | 23.25 |
| 12 | 1.75 | 11.25 | 15 | 1 | 14.6 | 11/4" | 7 | 28.258 | 28.25 | 11/8" | 12 | 26.538 | 26.5 |
| 14 | 2 | 13.1 | 15 | 1.5 | 14.35 | 13/8" | 6 | 30.851 | 30.75 | 11/4" | 12 | 29.713 | 29.5 |
| 16 | 2 | 15.1 | 16 | 1 | 15.6 | 11/2" | 6 | 34.026 | 34 | 13/8" | 12 | 32.888 | 32.7 |
| 18 | 2.5 | 16.85 | 16 | 1.5 | 15.35 | 13/4" | 5 | 3956 | 395 | 11/2" | 12 | 36063 | 36 |
| 20 | 2.5 | 18.85 | 18 | 4 | 17.6 | " | . | . | . | ||||
| 22 | 2.5 | 20.85 | 18 | 1.5 | 17.35 | 2 | 4.5 | 45.367 | 45.25 | ||||
| 24 | 3 | 22.65 | 18 | 2 | 17.1 | ||||||||
| 27 | 3 | 25.65 | 20 | 1 | 19.6 | ||||||||
| 30 | 3.5 | 28.4 | 20 | 1.5 | 19.35 | ||||||||
| 33 | 3.5 | 31.4 | 20 | 2 | 19.1 | ||||||||
| 36 | 4 | 34.15 | 24 | 2 | 23.1 | ||||||||
| 39 | 4 | 37.15 | 30 | 2 | 29.1 | ||||||||
| 42 | 4.5 | 39.9 | 36 | 3 | 34.65 | ||||||||
| 45 | 4.5 | 42.9 | 42 | 4 | 40.15 | ||||||||
| 48 | 5 | 45.65 | 48 | 3 | 46.65 |