EN 1663 (EN) and GB /T 6183.1 (GB) are equivalent fastener standards that specify the same or very similar products. Both standards cover 6 fastener types in our database.
EN 1663 (EN standard) and GB /T 6183.1 (GB standard) are equivalent standards that define the same fastener geometry and mechanical requirements. Minor differences may exist in tolerances, marking requirements, or referenced test methods, but the products are interchangeable in most applications. Always verify specific project requirements with your engineer.
| Property | EN 1663 | GB /T 6183.1 |
|---|---|---|
| Standard Body | EN | GB |
| Product Types | 6 fastener types | |
| Interchangeable? | Yes — equivalent standard | |
From: Prevailing Torque Type Hexagon Nuts with Flange and with Non-Metallic Insert — applies to both EN 1663 and GB /T 6183.1
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M10 | 2.5 | 23.96 | 24.8 | 20 | 21.6 | 1.5 | / | 39.9 | 32.95 | 3 | 42.8 |
| M5 | 1 | 8.74 | 9.1 |
Both EN 1663 and GB /T 6183.1 fasteners are available with various surface treatments. Common options for these standards include:
Request detailed technical specifications, material certifications, and availability information for your application requirements. Our engineering team can provide product recommendations, custom specifications, and technical documentation.
| ✓ |
| 6 |
| 6.75 |
| / |
| / |
| 12.2 |
| 11.05 |
| 1.1 |
| 14.2 |
| M6 | 1.5 | 13.07 | 13.5 | 10 | 10.8 | 1.25 | (1.0) | 19.6 | 16.64 | 1.5 | 21.8 |
| M8 | 2 | 17.68 | 18.2 | 14 | 15.1 | 1.5 | / | 27.6 | 23.36 | 2.1 | 29.9 |
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