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Pre Ream Drill Size

Pre Ream Drill for 3% Ream

Reamer Diameter
Drill for 3% Ream
Decimal Equivalent
7/16 (0.4375)
27/64
0.4244
27/64 (0.4219)
13/32
0.4092
13/32 (0.4062)
25/64
0.3941
25/64 (0.3906)
V
0.3789
3/8 (0.3750)
23/64
0.3638
23/64 (0.3594)
8.8MM
0.3486
11/32 (0.3438)
8.4MM
0.3335
21/64 (0.3281)
O
0.3183
5/16 (0.3125)
N
0.3031
19/32 (0.2969)
7.25MM
0.2880
9/32 (0.2812)
6.9MM
0.2728
17/64 (0.2656)
F
0.2576
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