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THREADING SYSTEMS - JEL - 05/2008 - Komet

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Tap drill diameters for formed threads<br />

M<br />

Metric Thread<br />

Size Nom. Ø Pitch Tap drill Ø<br />

M 1,8 1,8 0,35 1,66<br />

M 2 2 0,40 1,84<br />

M 2,2 2,2 0,45 2,02<br />

M 2,5 2,5 0,45 2,32<br />

M 3 3 0,50 2,80<br />

M 3,5 3,5 0,60 3,25<br />

M 4 4 0,70 3,71<br />

M 4,5 4,5 0,75 4,19<br />

M 5 5 0,80 4,67<br />

M 6 6 1,00 5,54<br />

M 7 7 1,00 6,54<br />

M 8 8 1,25 7,43<br />

M 9 9 1,25 8,43<br />

M 10 10 1,50 9,31<br />

M 11 11 1,50 10,31<br />

M 12 12 1,75 11,20<br />

M 14 14 2,00 13,00<br />

M 16 16 2,00 15,00<br />

The tap drill diameters listed are guidelines. The actual tap drill diameters have to be investigated in use as these depend on<br />

the fluidity of the material and the forming speed.<br />

MF<br />

Metric Fine Thread<br />

MF<br />

Metric Fine Thread<br />

Size Nom. Ø Pitch Tap drill Ø Size Nom. Ø Pitch Tap drill Ø<br />

M 2,5 x 0,35 2,5 0,35 2,36 M 20 x 1 20 1,00 19,54<br />

M 3 x 0,35 3 0,35 2,86 M 20 x 1,5 20 1,50 19,31<br />

M 3,5 x 0,35 3,5 0,35 3,36 M 20 x 2 20 2,00 19,00<br />

M 4 x 0,5 4 0,50 3,80 M 22 x 1 22 1,00 21,54<br />

M 5 x 0,5 5 0,50 4,80 M 22 x 1,5 22 1,50 21,31<br />

M 6 x 0,5 6 0,50 5,80 M 22 x 2 22 2,00 21,00<br />

M 6 x 0,75 6 0,75 5,69 M 24 x 1 24 1,00 23,54<br />

M 8 x 0,5 8 0,50 7,80 M 24 x 1,5 24 1,50 23,31<br />

M 8 x 0,75 8 0,75 7,69 M 24 x 2 24 2,00 23,00<br />

M 8 x 1 8 1,00 7,54 M 30 x 1,5 30 1,50 29,31<br />

M 10 x 0,75 10 0,75 9,69 M 30 x 2 30 2,00 29,00<br />

M 10 x 1 10 1,00 9,54 M 33 x 1,5 33 1,50 32,31<br />

M 12 x 1 12 1,00 11,54 M 33 x 2 33 2,00 32,00<br />

M 12 x 1,5 12 1,50 11,31 M 36 x 1,5 36 1,50 35,31<br />

M 14 x 1 14 1,00 13,54 M 36 x 2 36 2,00 35,00<br />

M 14 x 1,5 14 1,50 13,31<br />

M 15 x 1,5 15 1,50 14,31<br />

M 16 x 1 16 1,00 15,54<br />

M 16 x 1,5 16 1,50 15,31<br />

M 17 x 1,5 17 1,50 16,31<br />

M 18 x 1 18 1,00 17,54<br />

M 18 x 1,5 18 1,50 17,31<br />

M 18 x 2 18 2,00 17,00<br />

10<br />

141

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