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Pre Ream Drill Size

Pre Ream Drill for 2% Ream

Reamer Diameter
Drill for 2% Ream
Decimal Equivalent
1/4 (0.250)
C
0.2450
15/64 (0.2344)
1
0.2297
7/32 (0.2188)
5.4MM
0.2144
13/64 (0.2031)
5.0MM
0.1990
3/16 (0.1875)
14
0.1838
11/64 (0.1719)
19
0.1685
5/32 (0.1562)
24
0.1532
9/64 (0.1406)
29
0.1378
1/8 (0.1250)
31
0.1225
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