M10x1.5 Thread
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M10x1.5 thread in power hydraulics: dimensions, measurement, and application
The M10x1.5 thread is a metric thread with a nominal diameter of 10 mm and a pitch of 1.5 mm. In power hydraulics, it is found in hose ends, connections, adapters, and other fasteners. The M10x1.5 designation should always be read in full, as M10x1 threads are also found in hydraulic systems, which, despite having the same nominal diameter, have a different pitch and are not interchangeable.
On this page, you will find the most important information needed to identify the M10x1.5 thread: its diameter, pitch, practical measurement method, and tips for selecting hydraulic components.
Key dimensions of the M10x1.5 thread
- thread type: metric,
- designation: M10x1.5,
- nominal diameter: 10 mm,
- thread pitch: 1.5 mm,
- practical measurement of the external thread diameter: approximately 9.7-9.9 mm,
- practical measurement of the internal thread diameter: approximately 8.2-8.6 mm,
- standard direction: right-hand, unless specified otherwise by the manufacturer,
- application: hydraulic, pneumatic, and machine components.
What does M10x1.5 mean?
The letter M stands for metric thread. The number 10 defines its nominal diameter in millimeters, while the value 1.5 indicates the thread pitch. After performing one full revolution, the mating elements move axially by 1.5 mm.
The full M10x1.5 designation is important during part identification. Measuring the diameter alone at approximately 10 mm is not sufficient for correct fitting selection, as there are other M10 threads with a different pitch.
M10x1.5 vs M10x1 - an important difference
| Designation | Nominal diameter | Pitch | Interchangeability |
|---|---|---|---|
| M10x1.5 | 10 mm | 1.5 mm | no |
| M10x1 | 10 mm | 1.0 mm | no |
Both threads have a similar diameter measured with a caliper, but their threads have different spacing. Attempting to screw M10x1.5 with M10x1 can damage the thread and will not provide a proper connection.
How to measure the M10x1.5 thread?
For initial identification, a caliper and a thread pitch gauge are sufficient. First, measure the diameter, and then check the distance between successive threads.
- Clean the thread of dirt and damage that might hinder measurement.
- Measure the largest diameter of the external thread with a caliper.
- A value around 9.7-9.9 mm indicates a nominal size of M10.
- Measure the pitch using a thread pitch gauge.
- For M10x1.5, the distance between corresponding points of adjacent threads is 1.5 mm.
- Only after confirming the diameter and pitch should you select the mating component.
How to measure a 1.5 mm pitch without a gauge?
If you do not have a thread gauge, a more accurate result can be obtained by measuring several threads at once. For example, the distance covering 10 threads of an M10x1.5 thread should be approximately 15 mm.
Measuring several threads limits the error that easily occurs when trying to measure a single 1.5 mm gap with a caliper.
M10x1.5 external and internal thread
The M10x1.5 thread can appear as an external thread (male) or an internal thread (female). You will find external threads on fittings and adapters, while internal threads can be found in nuts, couplings, and other connection elements.
When measuring an internal thread, the caliper reading will be significantly smaller than 10 mm. A value around 8.2-8.6 mm may indicate M10x1.5, but the identification should also be confirmed by measuring the pitch.
Does the M10x1.5 thread alone provide a seal?
No. In many hydraulic connections, the thread is primarily responsible for tightening and clamping the components, while the actual sealing takes place on a separate sealing surface.
This can be, among others, a cone, a ring, a gasket, or another geometry provided by the manufacturer. Therefore, compliance with the M10x1.5 designation does not automatically mean compatibility between two hydraulic components.
M10x1.5 in the 24° metric system
In the hydraulic offer, the M10x1.5 thread can also appear in components belonging to the metric system with a 24° cone. An example is the size 5L connection, used in the light series of fittings for 5 mm tubes.
However, this does not mean that every M10x1.5 component automatically belongs to the 5L system. Before ordering, check the full fitting designation, sealing type, and the purpose of the specific part.
Where is the M10x1.5 thread used?
- hydraulic hose ends,
- metric connections,
- adapters and reducers,
- couplings and nuts,
- pneumatic system components,
- machine and equipment parts,
- selected automotive installation components.
How to select an M10x1.5 hydraulic component?
When selecting a fitting or hose end, you should not rely solely on the thread diameter. In hydraulics, several parameters must be checked simultaneously:
- M10x1.5 thread designation,
- external or internal thread,
- type of sealing surface,
- cone angle, if present,
- tube or hose diameter,
- fitting series, if applicable,
- working pressure,
- medium and operating temperature.
Most common errors in M10x1.5 identification
- confusing M10x1.5 with M10x1,
- identifying the thread based solely on the diameter,
- failure to measure the pitch,
- assuming that thread compatibility means compatibility of the sealing method,
- connecting elements with different cones or sealing surfaces,
- selecting a component without checking the permissible working pressure.
Metric threads in HYDRON power hydraulics
If you are identifying another connection, also check other metric thread sizes. Comparing diameter and pitch significantly reduces the risk of ordering the wrong component.
It is also worth looking for components with metric threads in the category hydraulic hose ends and among hydraulic fittings.
FAQ - M10x1.5 thread
What is the diameter of an M10x1.5 thread?
The nominal thread diameter is 10 mm. In practical external thread measurement with a caliper, you can get approximately 9.7-9.9 mm.
What is the pitch of an M10x1.5 thread?
The pitch is 1.5 mm, which means after one full revolution, the component moves axially by 1.5 mm.
Are M10x1 and M10x1.5 interchangeable?
No. They have the same nominal diameter of 10 mm but a different thread pitch: 1 mm and 1.5 mm, respectively.
Is every M10x1.5 thread in hydraulics the same?
No. The same thread can appear in various fitting designs. You must also check the connection type, sealing surface, series, and other component parameters.
How to recognize M10x1.5?
You should measure the thread diameter and its pitch. The external thread will have a diameter close to 10 mm, and the distance between successive threads will be 1.5 mm.