An M5 bolt has a major diameter of 5.0 mm. This designation is part of the ISO metric screw thread standard, where 'M' indicates a metric thread and the number following it refers to the nominal major diameter of the thread in millimeters.
Understanding M5 Thread Dimensions
The 'M' series specifies standard dimensions for bolts, screws, and nuts, ensuring interchangeability across various applications. For an M5 bolt, the 5 mm major diameter represents the largest diameter of the thread, measured from the crest of the thread on one side to the crest on the opposite side.
In addition to the major diameter, metric threads also have a defined thread pitch, which is the distance between adjacent thread crests. For an M5 bolt, the standard thread pitch is 0.80 mm. This combination of major diameter and pitch ensures proper fit and engagement with corresponding nuts or threaded holes.
The following table details the standard dimensions for M5 and closely related metric thread sizes:
| Thread Size | Major Diameter (mm) | Thread Pitch (mm) |
|---|---|---|
| M4.5 | 4.5 | 0.75 |
| M5 | 5.0 | 0.80 |
| M6 | 6.0 | 1.00 |
| M7 | 7.0 | 1.00 |
Practical Applications of M5 Bolts
M5 bolts are commonly used in a wide array of applications due to their versatile size, including:
- Electronics: Securing components within enclosures.
- Automotive: Fastening small parts and accessories.
- Furniture Assembly: Connecting various parts of flat-pack furniture.
- Machinery: Light-duty assembly in small mechanical devices.
Understanding these dimensions is crucial for selecting the correct fasteners and ensuring proper fit in engineering and manufacturing. For more comprehensive information on metric thread standards, you can refer to detailed resources on ISO Metric Thread Dimensions.
