JIS B1181 Hex Nuts
JIS B1181 hexagon nuts are fasteners manufactured in accordance with the Japanese Industrial Standard, covering both standard and thin hex nut specifications. With subtle dimensional adjustments tailored to Japanese industrial norms, they are optimized for compatibility with Japanese-manufactured equipment and export-grade machinery.
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Product introduction
JIS B1181 hexagon nuts are fasteners manufactured in accordance with the Japanese Industrial Standard, covering both standard and thin hex nut specifications. With subtle dimensional adjustments tailored to Japanese industrial norms, they are optimized for compatibility with Japanese-manufactured equipment and export-grade machinery.
Common Specifications
| Materials | Carbon steel |
| Class | 5, 6, 8, 10,12 |
| Range | M3 - M64 |
| Thread | Coarse , Fine, Extra Fine, Special-Fine |
| Surface | Plain, zinc plated, hot-dip galvanized, GEOMET, ZINC-NICKLE, DACROMATE etc. |
Key Features
- Conforms to JIS B 1181 standard
- Dimensional specifications aligned with Japanese equipment design norms
- Covers both standard and thin hex nut variants for versatile use
- High precision manufacturing ensuring compatibility with Japanese bolts
- Corrosion-resistant options for electronics and marine applications
Application industry
- Japanese Automotive & Electronics Manufacturing
- Export-Grade Machinery & Equipment Assembly
- Japanese Domestic Market Industrial Systems
- Consumer Electronics & Precision Device Assembly
- Marine & Offshore Equipment for Japanese Market
data table
| Size | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 | M27 | M30 | M33 | M36 | M39 | M42 | M45 | M48 | M52 | M56 | M60 | M64 |
| Coase | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 | 2.5 | 3 | 3 | 3.5 | 3.5 | 4 | 4 | 4.5 | 4.5 | 5 | 5 | 5.5 | 5.5 | 6 |
| Fine | 0.75 | 1 | 1.25 | 1.5 | 1.5 | 1.5 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 |
| Extra Fine | - | 0.75 | 1 | 1.25 | 1 | 1 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 2 | 2 | - | - | - | - | - | - | - | - | - |
| s Min (mm) | 9.40 | 12.30 | 16.30 | 18.20 | 21.20 | 23.20 | 26.20 | 29.20 | 31.00 | 35.00 | 40.00 | 45.00 | 49.00 | 53.80 | 58.80 | 63.80 | 68.80 | 73.80 | 78.80 | 82.60 | 73.60 | 78.60 |
| s Max (mm) | 10.00 | 13.00 | 17.00 | 19.00 | 22.00 | 24.00 | 27.00 | 30.00 | 32.00 | 36.00 | 41.00 | 46.00 | 50.00 | 55.00 | 60.00 | 65.00 | 70.00 | 75.00 | 80.00 | 85.00 | 75.00 | 80.00 |
| e Min (mm) | 11.05 | 14.38 | 17.77 | 20.03 | 23.36 | 26.75 | 29.56 | 32.95 | 37.29 | 39.55 | 45.20 | 50.85 | 55.37 | 60.79 | 66.44 | 71.30 | 76.95 | 82.60 | 88.25 | 93.56 | 99.21 | 104.86 |
| m Min (mm) | 4.52 | 5.92 | 7.42 | 9.42 | 10.30 | 12.30 | 14.30 | 15.30 | 17.30 | 18.16 | 21.16 | 23.16 | 25.16 | 28.16 | 30.00 | 33.00 | 35.00 | 37.00 | 41.00 | 44.00 | 47.00 | 49.80 |
| m Max (mm) | 6.00 | 6.50 | 8.00 | 10.00 | 11.00 | 13.00 | 15.00 | 16.00 | 18.00 | 19.00 | 22.00 | 24.00 | 26.00 | 29.00 | 31.00 | 34.00 | 36.00 | 38.00 | 42.00 | 45.00 | 48.00 | 51.00 |
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