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System of Measurement
DFARS Specialty Metals
Export Control Classification Number (ECCN)
REACH
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Drill Bit Size Identifiers
Inch
Letter
Metric
Wire Gauge
Measure drill bit sizes with these identifiers.
Drill/tap identifier includes a tap size conversion chart.
| For System of Measurement | For Use With | For Drill Bit Size | Wd. | Ht. | Thick. | Material | Color | Mounting Hole Dia. | Each | |
| Inch | Drills | 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 17/64", 9/32", 19/64", 5/16", 21/64", 11/32", 23/64", 3/8", 25/64", 13/32", 27/64", 7/16", 29/64", 15/32", 31/64", 1/2" | 2 1/2" | 6 1/2" | 5/64" | Steel | Silver | 1/8" | 0000000 | 000000 |
| Letter | Drills | A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z | 2 1/2" | 6 1/2" | 5/64" | Steel | Silver | 1/8" | 0000000 | 00000 |
| Metric | Drills | 1.5 mm, 2.0 mm, 2.25 mm, 2.5 mm, 2.75 mm, 3.0 mm, 3.25 mm, 3.5 mm, 3.75 mm, 4.0 mm, 4.25 mm, 4.5 mm, 4.75 mm, 5.0 mm, 5.5 mm, 6.0 mm, 6.5 mm, 7.0 mm, 7.5 mm, 8.0 mm, 8.5 mm, 9.0 mm, 9.5 mm, 10.0 mm, 10.5 mm, 11.0 mm, 11.5 mm, 12.0 mm, 12.5 mm, 5.25 mm | 2 1/2" | 6 1/2" | 5/64" | Steel | Silver | 1/8" | 0000000 | 00000 |
| Wire Gauge | Drills | 80 ga, 79 ga, 78 ga, 77 ga, 76 ga, 75 ga, 74 ga, 73 ga, 72 ga, 71 ga, 70 ga, 69 ga, 68 ga, 67 ga, 66 ga, 65 ga, 64 ga, 63 ga, 62 ga, 61 ga | 1" | 3" | 5/64" | Steel | Silver | 1/8" | 0000000 | 00000 |
| Wire Gauge | Drills/Taps | 60 ga, 59 ga, 58 ga, 57 ga, 56 ga, 55 ga, 54 ga, 53 ga, 52 ga, 51 ga, 50 ga, 49 ga, 48 ga, 47 ga, 46 ga, 45 ga, 44 ga, 43 ga, 42 ga, 41 ga, 40 ga, 39 ga, 38 ga, 37 ga, 36 ga, 35 ga, 34 ga, 33 ga, 32 ga, 31 ga, 30 ga, 29 ga, 28 ga, 27 ga, 26 ga, 25 ga, 24 ga, 23 ga, 22 ga, 21 ga, 20 ga, 19 ga, 18 ga, 17 ga, 16 ga, 15 ga, 14 ga, 13 ga, 12 ga, 11 ga, 10 ga, 9 ga, 8 ga, 7 ga, 6 ga, 5 ga, 4 ga, 3 ga, 2 ga, 1 ga | 2 1/2" | 6 1/2" | 5/64" | Steel | Silver | 1/8" | 0000000 | 00000 |