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Tapping Metric Fine Data

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Heli-Coil taps in various types and styles produce holes for Tolerance Classes 4H5H or 3B and 5H or 2B for use in the general range of aluminums, magnesiums, mild steels, free machining stainless steels and other free machining materials. Conventional shop practice and production procedures, speeds, feeds and lubricants should be used in combination with proper fixturing and good tapping machines or tapping heads. The tapped hole must be held within the stated pitch diameter limits for the required Tolerance Class of fit for the installed Heli-Coil insert. For Standard (free running inserts), a tolerance class 5H or 2B is recommended. For Screw-Locking inserts, a tolerance class 4H5H or 3B is recommended in order to develop higher locking torques




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  Results 1 - 21 of 21 1 

Item #

Nominal Thread Size

Minimum Countersink "M" Diameter (120º ± 5º included angle)

Maximum Countersink "M" Diameter (120º ± 5º included angle)

Minimum Pitch Diameter

4H Maximum Pitch Diameter

5H Maximum Pitch Diameter

M8x19.10 M8x1 9.10 in 9.70 in 8.650 in 8.719 in 8.742 in
M10x111.10 M10x1 11.10 in 11.70 in 10.650 in 10.719 in 10.742 in
M10x1.2511.50 M10X1.25 11.50 in 12.10 in 10.812 in 10.886 in 10.911 in
M12x1.2513.50 M12X1.25 13.50 in 14.10 in 12.812 in 12.898 in 12.926 in
M12x1.513.80 M12x1.5 13.80 in 14.40 in 12.974 in 13.067 in 13.099 in
M14x1.515.80 M14X1.5 15.80 in 16.40 in 14.974 in 15.067 in 15.099 in
M16x1.517.80 M16X1.5 17.80 in 18.40 in 16.974 in 17.067 in 17.099 in
M18x1.519.80 M18X1.5 19.80 in 20.40 in 18.974 in 19.067 in 19.099 in
M20x1.521.80 M20X1.5 21.80 in 22.40 in 20.974 in 21.067 in 21.099 in
M22x1.523.80 M22X1.5 23.80 in 24.40 in 22.974 in 23.067 in 23.099 in
M18x220.50 M18X2 20.50 in 21.10 in 19.299 in 19.406 in 19.444 in
M20x222.50 M20X2 22.50 in 23.10 in 21.299 in 21.406 in 21.444 in
M22x224.50 M22X2 24.50 in 25.10 in 23.299 in 23.406 in 23.444 in
M24x226.50 M24X2 26.50 in 27.10 in 25.299 in 25.414 in 25.454 in
M27x229.50 M27X2 29.50 in 30.10 in 28.299 in 28.414 in 28.454 in
M30x232.50 M30X2 32.50 in 33.10 in 31.299 in 31.414 in 31.454 in
M33x235.50 M33X2 35.50 in 36.10 in 34.299 in 34.414 in 34.454 in
M36x238.50 M36X2 38.50 in 39.10 in 37.299 in 37.414 in 37.454 in
M39x241.50 M39X2 41.50 in 42.10 in 40.299 in 40.414 in 40.454 in
M36x339.90 M36x3 39.90 in 40.50 in 37.948 in 38.093 in 38.135 in
M39x342.90 M39X3 42.90 in 43.50 in 40.948 in 41.093 in 41.135 in
  Results 1 - 21 of 21 1