HeliCoil Insert Lengths & Drill Sizes

Metric
Insert Size Drill Size Screw Thread Insert Length
1D 1.5D 2D 2.5D 3D

M2 x 0.4

 2.10 2.00 3.00 4.00 5.00 6.00

M2.2 x 0.45

 2.30 2.20 3.30 4.40 5.50 6.60

M2.5 x 0.45

 2.60 2.50 3.75 5.00 6.25 7.50

M3 x 0.5

 3.10 3.00 4.50 6.00 7.50 9.00

M3.5 x 0.6

 3.60 3.50 5.25 7.00 8.75 10.50

M4 x 0.7

 4.10 4.00 6.00 8.00 10.00 12.00

M4.5 x 0.75

 4.70 4.50 6.75 9.00 11.25 13.50

M5 x 0.8

 5.20 5.00 7.50 10.00 12.50 15.00

M6 x 1.0

 6.20 6.00 9.00 12.00 15.00 18.00

M7 x 1.0

 7.20 7.00 10.50 14.00 17.50 21.00

M8 x 1.0

 8.20 8.00 12.00 16.00 20.00 24.00

M8 x 1.25

 8.30 8.00 12.00 16.00 20.00 24.00

M9 x 1.25

 9.30 9.00 13.50 18.00 22.50 27.00

M10 x 1.0

 10.30 10.00 15.00 20.00 25.00 30.00

M10 x 1.25

 10.30 10.00 15.00 20.00 25.00 30.00

M10 x 1.5

 10.30 10.00 15.00 20.00 25.00 30.00

M11 x 1.5

 11.30 11.00 16.50 22.00 27.50 33.00

M12 x 1.25

 12.30 12.00 18.00 24.00 30.00 36.00

M12 x 1.5

 12.40 12.00 18.00 24.00 30.00 36.00

M12 x 1.75

 12.40 12.00 18.00 24.00 30.00 36.00

M14 x 1.25

 14.30 14.00 21.00 28.00 35.00 42.00

M14 x 1.5

 14.30 14.00 21.00 28.00 35.00 42.00

M14 x 2.0

 14.30 14.00 21.00 28.00 35.00 42.00

M16 x 1.5

 16.25 16.00 24.00 32.00 40.00 48.00

M16 x 2.0

 16.50 16.00 24.00 32.00 40.00 48.00

M18 x 1.5

 18.25 18.00 27.00 36.00 45.00 54.00

M18 x 2.0

 18.50 18.00 27.00 36.00 45.00 54.00

M18 x 2.5

 18.50 18.00 27.00 36.00 45.00 54.00

M20 x 1.5

 20.25 20.00 30.00 40.00 50.00 60.00

M20 x 2.0

 20.50 20.00 30.00 40.00 50.00 60.00

M20 x 2.5

 20.50 20.00 30.00 40.00 50.00 60.00

M22 x 1.5

 22.50 22.00 33.00 44.00 55.00 66.00

M22 x 2.0

 22.50 22.00 33.00 44.00 55.00 66.00

M22 x 2.5

 22.50 22.00 33.00 44.00 55.00 66.00

M24 x 1.5

 24.25 24.00 36.00 48.00 60.00 72.00

M24 x 2.0

 24.25 24.00 36.00 48.00 60.00 72.00

M24 x 3.0

 24.75 24.00 36.00 48.00 60.00 72.00

M27 x 2

 27.50 27.00 40.50 54.00 67.50 81.00

M27 x 3.0

 27.50 27.00 40.50 54.00 67.50 81.00

M30 x 1.5

 30.50 30.00 45.00 60.00 75.00 90.00

M30 x 2.0

 30.50 30.00 45.00 60.00 75.00 90.00

M30 x 3.5

 30.50 30.00 45.00 60.00 75.00 90.00

M33 x 2.0

 33.50 33.00 49.50 66.00 82.50 99.00

M36 x 2.0

 36.50 36.00 54.00 72.00 90.00 108.00

M36 x 4.0

 36.50 36.00 54.00 72.00 90.00 108.00

M39 x 2.0

 39.50 39.00 58.50 78.00 97.50 117.00

M39 x 4.0

 39.50 39.00 58.50 78.00 97.50 117.00
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