Basic Thread Dimensions
Property | mm | Inch |
---|---|---|
Nominal Diameter | 7 | 0.2756 |
Pitch (Distance) | 1 | 0.0394 |
Pitch Diameter | 6.35 | 0.25 |
Minor Diameter | 5.917 | 0.233 |
Thread Height | 0.541 | 0.0213 |
Addendum | 0.325 | 0.0128 |
Crest (External) Root (Internal) |
0.125 | 0.0049 |
Tap Drill Size (75% depth) |
6.03 | 0.237 |
Lead Angle (Single Start) |
2.87° |
Thread Family | Metric Coarse Pitch (MC) | |
Relevant Standards | ISO 68-1, ISO 9651-1, ISO 965-2, ISO 261,DIN 13 | |
Equivalent InchThread | 1/4 - 28 UNF |
For more threading data scroll down, or use the Thread Calculator
Choose the Threading Data you want to explore
M7Possible Thread Classes
M7 4g (External)
* Permisable values for thread Class 4g
# | Description | Value (mm) | Value (Inch) |
---|---|---|---|
es | Allowance | 0.026 (Ref) | 0.001 (Ref) |
d | Major Diameter | 6.862 - 6.974 | 0.2702 - 0.2746 |
d2 | Pitch Diameter | 6.253 - 6.324 | 0.2462 - 0.249 |
R | Root Radius | 0.125 (Min) | 0.0049 (Min) |
C | Root Truncation | 0.125 - 0.236 | 0.0049 - 0.0093 |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 4h (External)
* Permisable values for thread Class 4h
# | Description | Value (mm) | Value (Inch) |
---|---|---|---|
es | Allowance | 0 (Ref) | 0 (Ref) |
d | Major Diameter | 6.888 - 7 | 0.2712 - 0.2756 |
d2 | Pitch Diameter | 6.279 - 6.35 | 0.2472 - 0.25 |
R | Root Radius | 0.125 (Min) | 0.0049 (Min) |
C | Root Truncation | 0.125 - 0.236 | 0.0049 - 0.0093 |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 6e (External)
* Permisable values for thread Class 6e
# | Description | Value (mm) | Value (Inch) |
---|---|---|---|
es | Allowance | 0.06 (Ref) | 0.0024 (Ref) |
d | Major Diameter | 6.76 - 6.94 | 0.2661 - 0.2732 |
d2 | Pitch Diameter | 6.178 - 6.29 | 0.2432 - 0.2476 |
R | Root Radius | 0.125 (Min) | 0.0049 (Min) |
C | Root Truncation | 0.125 - 0.264 | 0.0049 - 0.0104 |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 6g (External)
* Permisable values for thread Class 6g
# | Description | Value (mm) | Value (Inch) |
---|---|---|---|
es | Allowance | 0.026 (Ref) | 0.001 (Ref) |
d | Major Diameter | 6.794 - 6.974 | 0.2675 - 0.2746 |
d2 | Pitch Diameter | 6.212 - 6.324 | 0.2446 - 0.249 |
R | Root Radius | 0.125 (Min) | 0.0049 (Min) |
C | Root Truncation | 0.125 - 0.264 | 0.0049 - 0.0104 |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 6h (External)
* Permisable values for thread Class 6h
# | Description | Value (mm) | Value (Inch) |
---|---|---|---|
es | Allowance | 0 (Ref) | 0 (Ref) |
d | Major Diameter | 6.82 - 7 | 0.2685 - 0.2756 |
d2 | Pitch Diameter | 6.238 - 6.35 | 0.2456 - 0.25 |
R | Root Radius | 0.125 (Min) | 0.0049 (Min) |
C | Root Truncation | 0.125 - 0.264 | 0.0049 - 0.0104 |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 8e (External)
* Permisable values for thread Class 8e
# | Description | Value (mm) | Value (Inch) |
---|---|---|---|
es | Allowance | 0.06 (Ref) | 0.0024 (Ref) |
d | Major Diameter | 6.66 - 6.94 | 0.2622 - 0.2732 |
d2 | Pitch Diameter | 6.11 - 6.29 | 0.2406 - 0.2476 |
R | Root Radius | 0.125 (Min) | 0.0049 (Min) |
C | Root Truncation | 0.125 - 0.305 | 0.0049 - 0.012 |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 8g (External)
* Permisable values for thread Class 8g
# | Description | Value (mm) | Value (Inch) |
---|---|---|---|
es | Allowance | 0.026 (Ref) | 0.001 (Ref) |
d | Major Diameter | 6.694 - 6.974 | 0.2635 - 0.2746 |
d2 | Pitch Diameter | 6.144 - 6.324 | 0.2419 - 0.249 |
R | Root Radius | 0.125 (Min) | 0.0049 (Min) |
C | Root Truncation | 0.125 - 0.305 | 0.0049 - 0.012 |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 5g4g (External)
* Permisable values for thread Class 5g4g
# | Description | Value (mm) | Value (Inch) |
---|---|---|---|
es | Allowance | 0.026 (Ref) | 0.001 (Ref) |
d | Major Diameter | 6.862 - 6.974 | 0.2702 - 0.2746 |
d2 | Pitch Diameter | 6.234 - 6.324 | 0.2454 - 0.249 |
R | Root Radius | 0.125 (Min) | 0.0049 (Min) |
C | Root Truncation | 0.125 - 0.25 | 0.0049 - 0.0098 |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 5h4h (External)
* Permisable values for thread Class 5h4h
# | Description | Value (mm) | Value (Inch) |
---|---|---|---|
es | Allowance | 0 (Ref) | 0 (Ref) |
d | Major Diameter | 6.888 - 7 | 0.2712 - 0.2756 |
d2 | Pitch Diameter | 6.26 - 6.35 | 0.2465 - 0.25 |
R | Root Radius | 0.125 (Min) | 0.0049 (Min) |
C | Root Truncation | 0.125 - 0.25 | 0.0049 - 0.0098 |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 5g6g (External)
* Permisable values for thread Class 5g6g
# | Description | Value (mm) | Value (Inch) |
---|---|---|---|
es | Allowance | 0.026 (Ref) | 0.001 (Ref) |
d | Major Diameter | 6.794 - 6.974 | 0.2675 - 0.2746 |
d2 | Pitch Diameter | 6.234 - 6.324 | 0.2454 - 0.249 |
R | Root Radius | 0.125 (Min) | 0.0049 (Min) |
C | Root Truncation | 0.125 - 0.25 | 0.0049 - 0.0098 |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 7g6g (External)
* Permisable values for thread Class 7g6g
# | Description | Value (mm) | Value (Inch) |
---|---|---|---|
es | Allowance | 0.026 (Ref) | 0.001 (Ref) |
d | Major Diameter | 6.794 - 6.974 | 0.2675 - 0.2746 |
d2 | Pitch Diameter | 6.184 - 6.324 | 0.2435 - 0.249 |
R | Root Radius | 0.125 (Min) | 0.0049 (Min) |
C | Root Truncation | 0.125 - 0.282 | 0.0049 - 0.0111 |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 7h6h (External)
* Permisable values for thread Class 7h6h
# | Description | Value (mm) | Value (Inch) |
---|---|---|---|
es | Allowance | 0 (Ref) | 0 (Ref) |
d | Major Diameter | 6.82 - 7 | 0.2685 - 0.2756 |
d2 | Pitch Diameter | 6.21 - 6.35 | 0.2445 - 0.25 |
R | Root Radius | 0.125 (Min) | 0.0049 (Min) |
C | Root Truncation | 0.125 - 0.282 | 0.0049 - 0.0111 |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 7e6e (External)
* Permisable values for thread Class 7e6e
# | Description | Value (mm) | Value (Inch) |
---|---|---|---|
es | Allowance | 0.06 (Ref) | 0.0024 (Ref) |
d | Major Diameter | 6.76 - 6.94 | 0.2661 - 0.2732 |
d2 | Pitch Diameter | 6.15 - 6.29 | 0.2421 - 0.2476 |
R | Root Radius | 0.125 (Min) | 0.0049 (Min) |
C | Root Truncation | 0.125 - 0.282 | 0.0049 - 0.0111 |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 9e8e (External)
* Permisable values for thread Class 9e8e
# | Description | Value (mm) | Value (Inch) |
---|---|---|---|
es | Allowance | 0.06 (Ref) | 0.0024 (Ref) |
d | Major Diameter | 6.66 - 6.94 | 0.2622 - 0.2732 |
d2 | Pitch Diameter | 6.066 - 6.29 | 0.2388 - 0.2476 |
R | Root Radius | 0.125 (Min) | 0.0049 (Min) |
C | Root Truncation | 0.125 - 0.328 | 0.0049 - 0.0129 |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 9g8g (External)
* Permisable values for thread Class 9g8g
# | Description | Value (mm) | Value (Inch) |
---|---|---|---|
es | Allowance | 0.026 (Ref) | 0.001 (Ref) |
d | Major Diameter | 6.694 - 6.974 | 0.2635 - 0.2746 |
d2 | Pitch Diameter | 6.1 - 6.324 | 0.2402 - 0.249 |
R | Root Radius | 0.125 (Min) | 0.0049 (Min) |
C | Root Truncation | 0.125 - 0.328 | 0.0049 - 0.0129 |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 4H (Internal)
* Permisable values for thread Class 4H
# | Description | Value (mm) | VValue (Inch) |
---|---|---|---|
EL | Allowance | 0 (Ref) | 0 (Ref) |
D1 | Minor Diameter | 5.917 - 6.067 | 0.233 - 0.2389 |
D2 | Pitch Diameter | 6.35 - 6.445 | 0.25 - 0.2537 |
D | Major Diameter | 7 (Min) | 0.2756 (Min) |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 5H (Internal)
* Permisable values for thread Class 5H
# | Description | Value (mm) | VValue (Inch) |
---|---|---|---|
EL | Allowance | 0 (Ref) | 0 (Ref) |
D1 | Minor Diameter | 5.917 - 6.107 | 0.233 - 0.2404 |
D2 | Pitch Diameter | 6.35 - 6.468 | 0.25 - 0.2546 |
D | Major Diameter | 7 (Min) | 0.2756 (Min) |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 5G (Internal)
* Permisable values for thread Class 5G
# | Description | Value (mm) | VValue (Inch) |
---|---|---|---|
EL | Allowance | 0.026 (Ref) | 0.001 (Ref) |
D1 | Minor Diameter | 5.943 - 6.133 | 0.234 - 0.2415 |
D2 | Pitch Diameter | 6.376 - 6.494 | 0.251 - 0.2557 |
D | Major Diameter | 7 (Min) | 0.2756 (Min) |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 6H (Internal)
* Permisable values for thread Class 6H
# | Description | Value (mm) | VValue (Inch) |
---|---|---|---|
EL | Allowance | 0 (Ref) | 0 (Ref) |
D1 | Minor Diameter | 5.917 - 6.153 | 0.233 - 0.2422 |
D2 | Pitch Diameter | 6.35 - 6.5 | 0.25 - 0.2559 |
D | Major Diameter | 7 (Min) | 0.2756 (Min) |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 6G (Internal)
* Permisable values for thread Class 6G
# | Description | Value (mm) | VValue (Inch) |
---|---|---|---|
EL | Allowance | 0.026 (Ref) | 0.001 (Ref) |
D1 | Minor Diameter | 5.943 - 6.179 | 0.234 - 0.2433 |
D2 | Pitch Diameter | 6.376 - 6.526 | 0.251 - 0.2569 |
D | Major Diameter | 7 (Min) | 0.2756 (Min) |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 7H (Internal)
* Permisable values for thread Class 7H
# | Description | Value (mm) | VValue (Inch) |
---|---|---|---|
EL | Allowance | 0 (Ref) | 0 (Ref) |
D1 | Minor Diameter | 5.917 - 6.217 | 0.233 - 0.2448 |
D2 | Pitch Diameter | 6.35 - 6.54 | 0.25 - 0.2575 |
D | Major Diameter | 7 (Min) | 0.2756 (Min) |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 7G (Internal)
* Permisable values for thread Class 7G
# | Description | Value (mm) | VValue (Inch) |
---|---|---|---|
EL | Allowance | 0.026 (Ref) | 0.001 (Ref) |
D1 | Minor Diameter | 5.943 - 6.243 | 0.234 - 0.2458 |
D2 | Pitch Diameter | 6.376 - 6.566 | 0.251 - 0.2585 |
D | Major Diameter | 7 (Min) | 0.2756 (Min) |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
M7 8G (Internal)
* Permisable values for thread Class 8G
# | Description | Value (mm) | VValue (Inch) |
---|---|---|---|
EL | Allowance | 0.026 (Ref) | 0.001 (Ref) |
D1 | Minor Diameter | 5.943 - 6.318 | 0.234 - 0.2487 |
D2 | Pitch Diameter | 6.376 - 6.612 | 0.251 - 0.2603 |
D | Major Diameter | 7 (Min) | 0.2756 (Min) |
LE | Normal Length of Engagement | 3 - 9 | 0.1181 - 0.3543 |
* Back to Thread Class Selection
Tap Drill Sizes for M7
- If not specified, assume a thread depth of 75%.
- You can learn more about thread depth in tapping here.
- To get the tap drill size in other depths, use our Tap Drill Size Calculator .
Thread Depth | Tap Drill Size (Inch) | Tap Drill Size (mm) |
---|---|---|
55% | 0.247 | 6.29 |
60% | 0.245 | 6.22 |
65% | 0.242 | 6.16 |
70% | 0.240 | 6.09 |
75% | 0.237 | 6.03 |
80% | 0.235 | 5.96 |
85% | 0.232 | 5.90 |
Over Wire Measurements for M7
* 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 | 0.505 - 1.01 | 0.0199 - 0.0398 |
Ideal Wire Diameter | 0.577 | 0.0227 |
Possible Wires From Standard Sets |
* 0.52 * 0.577 * 0.722 * 0.866 |
* 0.0206 * 0.0214 * 0.0222 * 0.0241 * 0.0262 * 0.0289 |
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 M7
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=7 MM, P=1 MM, L=10 MM)
(APPLICATION - EXTERNAL TURNING, TOWARDS CHUCK, RH TOOL, RH THREAD)
(FEED - 6 PASSES, FLANK, CONSTANT VOLUME)
(FINISH PASS - 0.025 MM)
(WITH CHAMFER - NO)
G28 U0 W0
T0101 G99 G97 S4547 M03
G00 Z5.0
X 9.2 M08
G76 P010060 Q25 R0.025
G76 X5.773 Z-10.0 P613 Q240 F1.0 R0.00
G28 U0 W0
M09
M30
%