JIS B 1186 High Strength Hexagon Nuts
JIS B 1186 specifies high strength hexagon nuts for friction grip joints, designed as a complete set with high strength bolts and plain washers for steel structure applications. These nuts feature large widths across flats and increased thickness, providing reliable fastening performance in critical structural connections.
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Product introduction
JIS B 1186 specifies high strength hexagon nuts for friction grip joints, designed as a complete set with high strength bolts and plain washers for steel structure applications. These nuts feature large widths across flats and increased thickness, providing reliable fastening performance in critical structural connections.
Common Specifications
| Materials | Carbon steel |
| Class | 2H |
| Range | M12 – M30 |
| Thread | Coarse , Fine, Extra Fine, Special-Fine |
| Surface | Plain, zinc plated, hot-dip galvanized, GEOMET, ZINC-NICKLE, DACROMATE etc. |
Key Features
- Large width across flats for reduced bearing pressure
- Designed for friction grip joints in steel structures
- Compatible with JIS B 1186 high strength bolts and washers
- Conforms to JIS B 1186:2013 Japanese standard
- Suitable for shear and tension connections
Application industry
- Japanese bridge construction and civil engineering
- High-rise building steel frameworks
- Industrial plant structures
- Railway infrastructure and stations
data table
| Size | M12 | M16 | M20 | M22 | M24 | M27 | M30 |
| Coase | 1.75 | 2 | 2.5 | 2.5 | 3 | 3 | 3.5 |
| Fine | 1.5 | 1.5 | 2 | 2 | 2 | 2 | 3 |
| Extra Fine | 1.25 | 1 | 1.5 | 1.5 | 1.5 | 1.5 | 2 |
| s Min (mm) | 21.20 | 26.20 | 31.00 | 35.00 | 40.00 | 45.00 | 49.00 |
| s Max (mm) | 22.00 | 27.00 | 32.00 | 36.00 | 41.00 | 46.00 | 50.00 |
| e Max (mm) | 25.40 | 31.20 | 37.00 | 41.60 | 47.30 | 53.10 | 57.70 |
| m Min (mm) | 11.65 | 15.65 | 19.60 | 21.60 | 23.60 | 26.60 | 29.60 |
| m Max (mm) | 12.35 | 16.35 | 20.40 | 22.40 | 24.40 | 27.40 | 30.40 |
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