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Besly Standard
Turbo Cut Taps

High Speed Steel
Ground Thread

Fast Spiral Flute
2, 3 and 4 Flute


Metric Sizes:
M3 | M3.5 | M4 | M4.5 | M5 | M6 | M7 | M8 | M10 | M12

Catalog Number: 4144

Besly Standard Turbo Cut Taps

Besly Turbo Cut Taps have a revolutionary fast spiral flute design that does a one-pass job in deep, blind holes and makes tapping cleaner and easier in thru holes.

Turbo Cut Taps provide the utmost accuracy in ductile materials while maintaining an extremely high rate of production.

Please call 800 435-2965 for current net pricing.

Note: Click the EDP No to check availability.

   
All dimensions are in inches.
  Besly Standard
Turbo Cut
Taps
Catl No. 4144
Metric Sizes
 
   
  Besly Surface Treatments Besly Drill Selector
Tap Size
& TPI
Inch
Equivalent
No. of Flutes Chamfer Type P.D. Limits Surface Treat EDP No Pkg Qty Overall Length
A
Thread Length
B
Shank Dia.
C
Square Length
D
Square Size
E
  M3 x 0.5 .1182 x 50.80 2 Plug D3   18172 12 1.940 .620 .141 .190 .110
  M3 x 0.5 .1182 x 50.80 2 Plug D3 TiN 15650 12 1.940 .620 .141 .190 .110
  M3 x 0.5 .1182 x 50.80 2 Bot D3   18173 12 1.940 .620 .141 .190 .110
  M3 x 0.5 .1182 x 50.80 2 Bot D3 TiN 15652 12 1.940 .620 .141 .190 .110
  M3.5 x 0.6 .1378 x 42.33 2 Plug D3   18175 12 2.000 .690 .141 .190 .110
  M3.5 x 0.6 .1378 x 42.33 2 Bot D4   18176 12 2.000 .690 .141 .190 .110
  M4 x 0.7 .1575 x 36.29 3 Plug D4   18178 12 2.120 .750 .168 .250 .131
  M4 x 0.7 .1575 x 36.29 3 Plug D4 TiN 15656 12 2.120 .750 .168 .250 .131
  M4 x 0.7 .1575 x 36.29 3 Bot D4   18179 12 2.120 .750 .168 .250 .131
  M4 x 0.7 .1575 x 36.29 3 Bot D4 TiN 15671 12 2.120 .750 .168 .250 .131
  M4.5 x 0.75 .1772 x 33.87 3 Plug D4   18181 12 2.380 .880 .194 .250 .152
  M4.5 x 0.75 .1772 x 33.87 3 Bot D4   18182 12 2.380 .880 .194 .250 .152
  M5 x 0.8 .1969 x 31.75 3 Plug D4   18184 12 2.380 .880 .194 .250 .152
  M5 x 0.8 .1969 x 31.75 3 Plug D4 TiN 15672 12 2.380 .880 .194 .250 .152
  M5 x 0.8 .1969 x 31.75 3 Bot D4   18185 12 2.380 .880 .194 .250 .152
  M5 x 0.8 .1969 x 31.75 3 Bot D4 TiN 15673 12 2.380 .880 .194 .250 .152
  M6 x 1 .2363 x 25.40 3 Plug D5   18187 12 2.500 1.000 .255 .310 .191
  M6 x 1 .2363 x 25.40 3 Plug D5 TiN 15674 12 2.500 1.000 .255 .310 .191
  M6 x 1 .2363 x 25.40 3 Bot D5   18188 12 2.500 1.000 .255 .310 .191
  M6 x 1 .2363 x 25.40 3 Bot D5 TiN 15675 12 2.500 1.000 .255 .310 .191
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Tap Size
& TPI
Inch
Equivalent
No. of L/G Chamfer Type P.D. Limits Surface Treat EDP No Pkg Qty Overall Length
A
Thread Length
B
Shank Dia.
C
Square Length
D
Square Size
E
  M7 x 1 .2756 x 25.40 3 Plug D5   18190 12 2.720 1.120 .318 .380 .238
  M7 x 1 .2756 x 25.40 3 Bot D5   18191 12 2.720 1.120 .318 .380 .238
  M8 x 1.25 .3150 x 20.32 3 Plug D5   18196 12 2.720 1.120 .318 .380 .238
  M8 x 1.25 .3150 x 20.32 3 Plug D5 33 15545 12 2.720 1.120 .318 .380 .238
  M8 x 1.25 .3150 x 20.32 3 Plug D5 TiN 15676 12 2.720 1.120 .318 .380 .238
  M8 x 1.25 .3150 x 20.32 3 Bot D5   18197 12 2.720 1.120 .318 .380 .238
  M8 x 1.25 .3150 x 20.32 3 Bot D5 33 15488 12 2.720 1.120 .318 .380 .238
  M8 x 1.25 .3150 x 20.32 3 Bot D5 TiN 15677 12 2.720 1.120 .318 .380 .238
  M8 x 1 .3150 x 20.32 3 Plug D5   18193 12 2.720 1.120 .318 .380 .238
  M8 x 1 .3150 x 20.32 3 Bot D5   18194 12 2.720 1.120 .318 .380 .238
  M10 x 1.5 .3937 x 16.93 3 Plug D6   18202 12 2.940 1.250 .381 .440 .286
  M10 x 1.5 .3937 x 16.93 3 Plug D6 33 15496 12 2.940 1.250 .381 .440 .286
  M10 x 1.5 .3937 x 16.93 3 Plug D6 TiN 15678 12 2.940 1.250 .381 .440 .286
  M10 x 1.5 .3937 x 16.93 3 Bot D6   18203 12 2.940 1.250 .381 .440 .286
  M10 x 1.5 .3937 x 16.93 3 Bot D6 33 15497 12 2.940 1.250 .381 .440 .286
  M10 x 1.5 .3937 x 16.93 3 Bot D6 TiN 15679 12 2.940 1.250 .381 .440 .286
  M10 x 1.25 .3937 x 16.93 3 Plug D5   18199 12 2.940 1.250 .381 .440 .286
  M10 x 1.25 .3937 x 16.93 3 Bot D5   18200 12 2.940 1.250 .381 .440 .286
  M12 x 1.75 .4725 x 14.51 3 Plug D6   18208 12 3.380 1.660 .367 .440 .275
  M12 x 1.75 .4725 x 14.51 3 Plug D6 TiN 15683 12 3.380 1.660 .367 .440 .275
  M12 x 1.75 .4725 x 14.51 3 Bot D6   18209 12 3.380 1.660 .367 .440 .275
  M12 x 1.75 .4725 x 14.51 3 Bot D6 TiN 15684 12 3.380 1.660 .367 .440 .275
  M12 x 1.25 .4725 x 20.32 3 Plug D5   18205 12 3.380 1.660 .367 .440 .275
  M12 x 1.25 .4725 x 20.32 3 Bot D5   18206 12 3.380 1.660 .367 .440 .275
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INTERNAL THREAD - CLASS 6H
 

Nominal Size and Pitch

Millimeters Inches
Minor Diameter Pitch Diameter  

Major Dia.

Minor Diameter Pitch Diameter  

Major Dia.

Min. Max. Min. Max. Min. Max. Min. Max.
  M3 x 0.5 2.459 2.599 2.675 2.775 3.000 .0968 .1023 .1053 .1092 .1181
  M3.5 x 0.6 2.850 3.010 3.110 3.222 3.500 .1122 .1185 .1224 .1268 .1378
  M4 x 0.7 3.242 3.422 3.545 3.663 4.000 .1276 .1347 .1396 .1442 .1575
  M4.5 x 0.75 3.688 3.878 4.013 4.131 4.500 .1452 .1526 .1580 .1626 .1772
  M5 x 0.8 4.134 4.334 4.480 4.605 5.000 .1628 .1706 .1764 .1813 .1968
  M6 x 1 4.917 5.153 5.350 5.550 6.000 .1936 .2029 .2106 .2165 .2362
  M7 x 1 5.917 6.153 6.350 6.500 7.000 .2330 .2422 .2500 .2559 .2756
  M8 x 1.25 6.647 6.912 7.188 7.348 8.000 .2617 .2721 .2830 .2893 .3150
  M8 x 1 6.917 7.153 7.350 7.500 8.000 .2723 .2816 .2894 .2953 .3150
  M10 x 1.5 8.376 8.676 9.026 9.206 10.000 .3298 .3416 .3554 .3624 .3937
  M10 x 1.25 8.647 8.912 9.188 9.348 10.000 .3404 .3509 .3617 .3680 .3937
  M12 x 1.75 10.106 10.441 10.863 11.063 12.000 .3979 .4111 .4277 .4356 .4724
  M12 x 1.25 10.647 10.912 11.188 11.368 12.000 .4192 .4296 .4405 .4476 .4724
  The above thread dimensions are in agreement with ANSI B1.13M-1979 and current ISO standards. Go to the top of this page.