Number Size of Drill Bit |
Decimal Equivalent (inches) | Millimeter Equivalent |
No. 60 | .040" | 1.016mm |
No. 61 | .039" | 0.991mm |
No. 62 | .038" | 0.965mm |
No. 63 | .037" | 0.940mm |
No. 64 | .036" | 0.914mm |
No. 65 | .035" | 0.889mm |
No. 66 | .033" | 0.838mm |
No. 67 | .032" | 0.813mm |
No. 68 | .031" | 0.787mm |
No. 69 | .029" | 0.737mm |
No. 70 | .028" | 0.711mm |
No. 71 | .026" | 0.660mm |
No. 72 | .025" | 0.635mm |
No. 73 | .024" | 0.610mm |
No. 74 | .023" | 0.584mm |
No. 75 | .021" | 0.533mm |
No. 76 | .020" | 0.508mm |
No. 77 | .018" | 0.457mm |
No. 78 | .016" | 0.406mm |
No. 79 | .015" | 0.381mm |
No. 80 | .014" | 0.356mm |
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