Round Nuts are essential components in various industries, offering reliable fastening solutions for applications requiring a smooth, circular shape. Often compared to Hexagon Nut or Square Nut types, the primary distinction lies in their design; Round Nuts lack external flat surfaces for a wrench, making them ideal for situations where a low-profile, aesthetically pleasing finish is necessary. They are frequently used in conjunction with washers or within pre-tapped holes. While a Hexagon Flange Nut incorporates a built-in washer to distribute load, and a Lock Nut is engineered to resist loosening under vibration, the standard Round Nut provides a fundamental and versatile threaded connection.
The Round Nut excels in applications where a standard hexagonal or square profile is undesirable or impractical. Its seamless cylindrical exterior minimizes snagging and presents a clean, finished look, making it a preferred choice in furniture assembly, consumer electronics, and decorative metalwork. The Round Nut is typically installed using a spanner wrench that fits into the internal holes or notches machined into its face, allowing for secure tightening without marring the external surface. This design is particularly advantageous in confined spaces where a standard wrench cannot achieve the necessary rotation.
| Property | Specification / Value |
|---|---|
| Standard | ISO 4035, DIN 1587, ANSI B18.2.2 |
| Common Materials | Grade 5 Steel, 304 Stainless Steel, A36 Steel, Naval Brass |
| Strength Grades (Steel) | Grade 5, Grade 8, Class 10 |
| Common Finishes | Plain, Zinc-Plated, Hot-Dip Galvanized, Dichromate |
| Temperature Range | -50°C to +300°C (varies by material) |
| Corrosion Resistance | Excellent (Stainless Steel/Brass), Good (Plated Steel) |
| Nominal Size (M) | Width Across Flats (A) mm | Height (H) mm | Thread Pitch (mm) | Approx. Weight (per 1000 pieces, kg) |
|---|---|---|---|---|
| M4 | 7.00 | 3.20 | 0.70 | 0.95 |
| M6 | 10.00 | 5.00 | 1.00 | 3.10 |
| M8 | 13.00 | 6.50 | 1.25 | 6.80 |
| M10 | 17.00 | 8.00 | 1.50 | 13.50 |
| M12 | 19.00 | 10.00 | 1.75 | 22.00 |
| M16 | 24.00 | 13.00 | 2.00 | 48.00 |