Thread data sheet

Basic Thread Dimensions

Property mm Inch
Nominal Diameter 280 11.0236
Pitch (Distance) 6 0.2362
Pitch Diameter 276.103 10.8702
Minor Diameter 273.505 10.7679
Thread Height 3.248 0.1279
Addendum 1.949 0.0767
Crest (External)
Root (Internal)		 0.75 0.0295
Tap Drill Size
(75% depth)		 274.15 10.793
Lead Angle
(Single Start)		 0.4°
Thread Family Metric Fine Pitch (MF)
Relevant Standards ISO 68-1, ISO 9651-1, ISO 965-2, ISO 261,DIN 13

For more threading data scroll down, or use the Thread Calculator

Choose the Threading Data you want to explore

Unified Inch Thread Classes

Tolerance Classes

Thread Milling CNC program

Thread Milling Gcode

Turning Gcode

Over Wire

Unified Inch Thread Classes

Tolerance Classes

Thread Milling Gcode

Turning Gcode

Over Wire

M280 X 6Possible Thread Classes

External Threads

4g, 4h, 6e, 6g, 6h, 8e, 8g, 5g4g, 5h4h, 5g6g, 7g6g, 7h6h, 7e6e, 9e8e, 9g8g

Metric ISO External Thread - Tolerance sketch

Internal Threads

4H, 5H, 5G, 6H, 6G, 7H, 7G, 8G

Metric ISO Internal Thread - Tolerance sketch

M280 X 6 4g (External)

* Permisable values for thread Class 4g

# Description Value (mm) Value (Inch)
es Allowance 0.08 (Ref) 0.0031 (Ref)
d Major Diameter 279.545 - 279.92 11.0057 - 11.0205
d2 Pitch Diameter 275.823 - 276.023 10.8592 - 10.867
R Root Radius 0.75 (Min) 0.0295 (Min)
C Root Truncation 0.75 - 1.232 0.0295 - 0.0485
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 4h (External)

* Permisable values for thread Class 4h

# Description Value (mm) Value (Inch)
es Allowance 0 (Ref) 0 (Ref)
d Major Diameter 279.625 - 280 11.0089 - 11.0236
d2 Pitch Diameter 275.903 - 276.103 10.8623 - 10.8702
R Root Radius 0.75 (Min) 0.0295 (Min)
C Root Truncation 0.75 - 1.232 0.0295 - 0.0485
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 6e (External)

* Permisable values for thread Class 6e

# Description Value (mm) Value (Inch)
es Allowance 0.118 (Ref) 0.0046 (Ref)
d Major Diameter 279.282 - 279.882 10.9954 - 11.019
d2 Pitch Diameter 275.67 - 275.985 10.8531 - 10.8656
R Root Radius 0.75 (Min) 0.0295 (Min)
C Root Truncation 0.75 - 1.332 0.0295 - 0.0524
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 6g (External)

* Permisable values for thread Class 6g

# Description Value (mm) Value (Inch)
es Allowance 0.08 (Ref) 0.0031 (Ref)
d Major Diameter 279.32 - 279.92 10.9969 - 11.0205
d2 Pitch Diameter 275.708 - 276.023 10.8546 - 10.867
R Root Radius 0.75 (Min) 0.0295 (Min)
C Root Truncation 0.75 - 1.332 0.0295 - 0.0524
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 6h (External)

* Permisable values for thread Class 6h

# Description Value (mm) Value (Inch)
es Allowance 0 (Ref) 0 (Ref)
d Major Diameter 279.4 - 280 11 - 11.0236
d2 Pitch Diameter 275.788 - 276.103 10.8578 - 10.8702
R Root Radius 0.75 (Min) 0.0295 (Min)
C Root Truncation 0.75 - 1.332 0.0295 - 0.0524
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 8e (External)

* Permisable values for thread Class 8e

# Description Value (mm) Value (Inch)
es Allowance 0.118 (Ref) 0.0046 (Ref)
d Major Diameter 278.932 - 279.882 10.9816 - 11.019
d2 Pitch Diameter 275.485 - 275.985 10.8459 - 10.8656
R Root Radius 0.75 (Min) 0.0295 (Min)
C Root Truncation 0.75 - 1.471 0.0295 - 0.0579
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 8g (External)

* Permisable values for thread Class 8g

# Description Value (mm) Value (Inch)
es Allowance 0.08 (Ref) 0.0031 (Ref)
d Major Diameter 278.97 - 279.92 10.9831 - 11.0205
d2 Pitch Diameter 275.523 - 276.023 10.8474 - 10.867
R Root Radius 0.75 (Min) 0.0295 (Min)
C Root Truncation 0.75 - 1.471 0.0295 - 0.0579
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 5g4g (External)

* Permisable values for thread Class 5g4g

# Description Value (mm) Value (Inch)
es Allowance 0.08 (Ref) 0.0031 (Ref)
d Major Diameter 279.545 - 279.92 11.0057 - 11.0205
d2 Pitch Diameter 275.773 - 276.023 10.8572 - 10.867
R Root Radius 0.75 (Min) 0.0295 (Min)
C Root Truncation 0.75 - 1.277 0.0295 - 0.0503
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 5h4h (External)

* Permisable values for thread Class 5h4h

# Description Value (mm) Value (Inch)
es Allowance 0 (Ref) 0 (Ref)
d Major Diameter 279.625 - 280 11.0089 - 11.0236
d2 Pitch Diameter 275.853 - 276.103 10.8604 - 10.8702
R Root Radius 0.75 (Min) 0.0295 (Min)
C Root Truncation 0.75 - 1.277 0.0295 - 0.0503
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 5g6g (External)

* Permisable values for thread Class 5g6g

# Description Value (mm) Value (Inch)
es Allowance 0.08 (Ref) 0.0031 (Ref)
d Major Diameter 279.32 - 279.92 10.9969 - 11.0205
d2 Pitch Diameter 275.773 - 276.023 10.8572 - 10.867
R Root Radius 0.75 (Min) 0.0295 (Min)
C Root Truncation 0.75 - 1.277 0.0295 - 0.0503
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 7g6g (External)

* Permisable values for thread Class 7g6g

# Description Value (mm) Value (Inch)
es Allowance 0.08 (Ref) 0.0031 (Ref)
d Major Diameter 279.32 - 279.92 10.9969 - 11.0205
d2 Pitch Diameter 275.623 - 276.023 10.8513 - 10.867
R Root Radius 0.75 (Min) 0.0295 (Min)
C Root Truncation 0.75 - 1.398 0.0295 - 0.055
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 7h6h (External)

* Permisable values for thread Class 7h6h

# Description Value (mm) Value (Inch)
es Allowance 0 (Ref) 0 (Ref)
d Major Diameter 279.4 - 280 11 - 11.0236
d2 Pitch Diameter 275.703 - 276.103 10.8544 - 10.8702
R Root Radius 0.75 (Min) 0.0295 (Min)
C Root Truncation 0.75 - 1.398 0.0295 - 0.055
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 7e6e (External)

* Permisable values for thread Class 7e6e

# Description Value (mm) Value (Inch)
es Allowance 0.118 (Ref) 0.0046 (Ref)
d Major Diameter 279.282 - 279.882 10.9954 - 11.019
d2 Pitch Diameter 275.585 - 275.985 10.8498 - 10.8656
R Root Radius 0.75 (Min) 0.0295 (Min)
C Root Truncation 0.75 - 1.398 0.0295 - 0.055
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 9e8e (External)

* Permisable values for thread Class 9e8e

# Description Value (mm) Value (Inch)
es Allowance 0.118 (Ref) 0.0046 (Ref)
d Major Diameter 278.932 - 279.882 10.9816 - 11.019
d2 Pitch Diameter 275.355 - 275.985 10.8407 - 10.8656
R Root Radius 0.75 (Min) 0.0295 (Min)
C Root Truncation 0.75 - 1.559 0.0295 - 0.0614
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 9g8g (External)

* Permisable values for thread Class 9g8g

# Description Value (mm) Value (Inch)
es Allowance 0.08 (Ref) 0.0031 (Ref)
d Major Diameter 278.97 - 279.92 10.9831 - 11.0205
d2 Pitch Diameter 275.393 - 276.023 10.8422 - 10.867
R Root Radius 0.75 (Min) 0.0295 (Min)
C Root Truncation 0.75 - 1.559 0.0295 - 0.0614
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 4H (Internal)

* Permisable values for thread Class 4H

# Description Value (mm) VValue (Inch)
EL Allowance 0 (Ref) 0 (Ref)
D1 Minor Diameter 273.505 - 274.005 10.7679 - 10.7876
D2 Pitch Diameter 276.103 - 276.368 10.8702 - 10.8806
D Major Diameter 280 (Min) 11.0236 (Min)
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 5H (Internal)

* Permisable values for thread Class 5H

# Description Value (mm) VValue (Inch)
EL Allowance 0 (Ref) 0 (Ref)
D1 Minor Diameter 273.505 - 274.135 10.7679 - 10.7927
D2 Pitch Diameter 276.103 - 276.438 10.8702 - 10.8834
D Major Diameter 280 (Min) 11.0236 (Min)
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 5G (Internal)

* Permisable values for thread Class 5G

# Description Value (mm) VValue (Inch)
EL Allowance 0.08 (Ref) 0.0031 (Ref)
D1 Minor Diameter 273.585 - 274.215 10.7711 - 10.7959
D2 Pitch Diameter 276.183 - 276.518 10.8733 - 10.8865
D Major Diameter 280 (Min) 11.0236 (Min)
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 6H (Internal)

* Permisable values for thread Class 6H

# Description Value (mm) VValue (Inch)
EL Allowance 0 (Ref) 0 (Ref)
D1 Minor Diameter 273.505 - 274.305 10.7679 - 10.7994
D2 Pitch Diameter 276.103 - 276.528 10.8702 - 10.8869
D Major Diameter 280 (Min) 11.0236 (Min)
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 6G (Internal)

* Permisable values for thread Class 6G

# Description Value (mm) VValue (Inch)
EL Allowance 0.08 (Ref) 0.0031 (Ref)
D1 Minor Diameter 273.585 - 274.385 10.7711 - 10.8026
D2 Pitch Diameter 276.183 - 276.608 10.8733 - 10.8901
D Major Diameter 280 (Min) 11.0236 (Min)
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 7H (Internal)

* Permisable values for thread Class 7H

# Description Value (mm) VValue (Inch)
EL Allowance 0 (Ref) 0 (Ref)
D1 Minor Diameter 273.505 - 274.505 10.7679 - 10.8073
D2 Pitch Diameter 276.103 - 276.633 10.8702 - 10.8911
D Major Diameter 280 (Min) 11.0236 (Min)
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 7G (Internal)

* Permisable values for thread Class 7G

# Description Value (mm) VValue (Inch)
EL Allowance 0.08 (Ref) 0.0031 (Ref)
D1 Minor Diameter 273.585 - 274.585 10.7711 - 10.8104
D2 Pitch Diameter 276.183 - 276.713 10.8733 - 10.8942
D Major Diameter 280 (Min) 11.0236 (Min)
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

M280 X 6 8G (Internal)

* Permisable values for thread Class 8G

# Description Value (mm) VValue (Inch)
EL Allowance 0.08 (Ref) 0.0031 (Ref)
D1 Minor Diameter 273.585 - 274.835 10.7711 - 10.8203
D2 Pitch Diameter 276.183 - 276.853 10.8733 - 10.8997
D Major Diameter 280 (Min) 11.0236 (Min)
LE Normal Length of Engagement 40 - 118 1.5748 - 4.6457

* Back to Thread Class Selection

Over Wire Measurements for M280 X 6


* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it here

mm Inch
Permissible Wire Diameter Range 3.031 - 6.062 0.1193 - 0.2387
Ideal Wire Diameter 3.464 0.1364
Possible Wires
From Standard Sets		 * 3.175
* 3.464
* 4.042
* 4.619
* 5.196
* 5.774
 * 0.1283
* 0.1443
* 0.165
* 0.1777
* 0.1925
* 0.21

Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!

CNC Gcode Program for Turning of M280 X 6

The below sample Gcode is configured for:

  • Fanuc Controller
  • External RH Thread
  • Right hand tool, machining towards the chuck
  • Flank Infeed method with contant volume
  • Flank Infeed method with contant volume
  • Cutting conditions for steel
  • Default number of passes

You can configure all the above parameters and much more in our Thread Turning Gcode Generator 


%
O0100
(MACHINING DOCTOR - THREADING CNC PROGRAM)
(CONTROLER - FANUC A)
(THREAD - D=280 MM, P=6 MM, L=60 MM)
(APPLICATION - EXTERNAL TURNING, TOWARDS CHUCK, RH TOOL, RH THREAD)
(FEED - 17 PASSES, FLANK, CONSTANT VOLUME)
(FINISH PASS - 0.056 MM)
(WITH CHAMFER -  NO)
G28 U0 W0
T0101 G99 G97 S114 M03
G00 Z10.0
X 290.0 M08
G76 P010060 Q56 R0.056
G76 X272.639 Z-60.0 P3681 Q879 F6.0 R0.00 
G28 U0 W0
M09
M30
%

CNC Gcode Program for Thread Milling of M280 X 6

The below sample Gcode is configured for:

  • Fanuc Controller
  • Internal RH Thread
  • Climb Milling
  • Cutter diameter: 70% of the thread diameter
  • Single tooth Thread Mill cutter
  • Cutting conditions for steel
  • One radial pass

You can configure all the above parameters and much more in our Thread Milling Gcode Generator 


%
O101
(WWW.MACHININGDOCTOR.COM - THREADMILLING PROGRAM)
(CONTROLER - FANUC)
(THREAD - D=280 MM, P=6 MM, L=60 MM)
(APPLICATION - INTERNAL, RH THREAD, CLIMB MILLING)
(CUTTER - D=140 [SINGLE TOOTH])
N1 M06 T1
G54
G90 G40 G17 G94 G21
G00 X0 Y0 S227 M03
G43 H1 Z20.0 M08
(M-CODE "THROUGH COOLANT ON")
(PASS 1 / 1)
G90 G01 Z-60.75 F2000
G91 G01 G41 D1 X35.0 Y-35.0 F34
G03 X35.0 Y35.0 Z0.75 I0 J35.0 F9
G03 Z6.0 I-70.0 J0 F17
G03 Z6.0 I-70.0 J0
G03 Z6.0 I-70.0 J0
G03 Z6.0 I-70.0 J0
G03 Z6.0 I-70.0 J0
G03 Z6.0 I-70.0 J0
G03 Z6.0 I-70.0 J0
G03 Z6.0 I-70.0 J0
G03 Z6.0 I-70.0 J0
G03 Z6.0 I-70.0 J0
G03 X-35.0 Y35.0 Z0.75 I-35.0 J0
G01 G40 X-35.0 Y-35.0 F2000
G90 G00 Z20.0
M30
(PLEASE NOTE THIS GCODE HAS NOT BEEN TESTED ON YOUR MACHINE AND SETUP. WE CANNOT GUARANTEE ITS ACCURACY OR COMPATIBILITY. NOTE THAT YOU ARE USING IT AT YOUR OWN RISK, AND WE SHALL NOT BE HELD LIABLE FOR ANY DAMAGES OR LOSSES ARISING FROM THE USE OF THIS PROGRAM.)
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