An M5 Cap Nut is a hex nut with a domed, closed end. This design serves both an aesthetic purpose (covering the end of a threaded bolt for a finished look) and a safety purpose (protecting against contact with the exposed thread).
These are the most critical specifications for engineering and purchasing. Dimensions are in millimeters (mm).
| Feature | Specification (mm) | Explanation / Notes |
|---|---|---|
| Thread Size | M5 | Metric thread with a 5mm nominal diameter. |
| Thread Pitch | 0.8 mm | Standard coarse pitch for M5. The distance between threads. |
| Width Across Flats (W) | 8 mm | The size of the wrench needed to tighten it. |
| Height (H) | 5 mm | Height of the hexagonal base section. |
| Total Height (T) | ~8 – 10 mm | Total height including the domed cap. Can vary slightly by manufacturer. |
| Cap Diameter (D) | ~9.0 – 9.5 mm | The approximate maximum outer diameter of the dome. |
| Thread Length | ~5 – 6 mm | The internal depth of the actual threaded portion. |
Furniture Assembly: To cover bolt ends for safety and a clean look.
Automotive: Where exposed threads could cause injury or snag wiring.
Playground Equipment: For safety to prevent scrapes and cuts.
Decorative Fixtures: Where the finished appearance is important.
Electrical Enclosures: To prevent contact with live terminals.
| Weight | 0.002 kg |
|---|
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