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Pre Tap Drill Size

Metric Cutting Tap

Tap
Drill Size
Decimal Equivalent
M39 x 3.00
36.00MM
1.4173
M39 x 4.00
35.00MM
1.3780
M36 x 3.00
33.00MM
1.2992
M36 x 4.00
32.00MM
1.2598
M33 x 2.00
31.00MM
1.2205
M33 x 3.50
29.50MM
1.1614
M30 x 2.00
28.00MM
1.1024
M30 x 3.50
26.50MM
1.0433
M27 x 2.00
25.00MM
0.9843
M27 x 3.00
24.00MM
0.9449
M24 x 2.00
22.00MM
0.8661
M24 x 3.00
21.00MM
0.8268
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