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The SDA Nut, together with the bearing plate, forms the “nail head” or “pile head,” the key point where the anchor’s load is securely transferred to the ground.
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SDA Nuts
Domed/Hex
Application Areas
- Soil Nailing
- Tunnel Support
- Slope Stabilization
- Rock Bolting
- Structural Reinforcement
- Foundations
- Underpinning
SDA Nut
Technical Data
| Domed Nuts | Key Size (Across Flats) | Length | Dome Diameter | Thread Size | Ultimate Load | Tensile Load | Weight |
|---|---|---|---|---|---|---|---|
| R25 | 41 mm | 41 mm | 50 mm | 21.8*1.5/12.7 mm | > 250 kN | > 190 kN | 0.30 kg/pcs |
| R32 | 46 mm | 45 mm | 60 mm | 28.4*1.5/12.7 mm | > 360 kN | > 280 kN | 0.45 kg/pcs |
| R38 | 55 mm | 65 mm | 70 mm | 35*1.5/12.7 mm | > 500 kN | > 400 kN | 0.82 kg/pcs |
| R51 | 75 mm | 70 mm | 90 mm | 47*1.5/12.7 mm | > 800 kN | > 630 kN | 1.85 kg/pcs |
| Hex Nuts | Key Size (Across Flats) | Length | Thread Size | Ultimate Load | Tensile Load | Weight |
|---|---|---|---|---|---|---|
| R25N | 41 mm | 41 mm | 21.8*1.5/12.7 mm | > 200 kN | > 150 kN | 0.29 kg/pcs |
| R25S | 41 mm | 62 mm | 21.8*1.5/12.7 mm | > 250 kN | > 190 kN | 0.45 kg/pcs |
| R32N | 46 mm | 45 mm | 28.4*1.5/12.7 mm | > 280 kN | > 230 kN | 0.38 kg/pcs |
| R32S | 46 mm | 65 mm | 28.4*1.5/12.7 mm | > 360 kN | > 280 kN | 0.53 kg/pcs |
| R38N | 50 mm | 60 mm | 35*1.5/12.7 mm | > 500 kN | > 400 kN | 0.50 kg/pcs |
| R38S | 50 mm | 80 mm | 35*1.5/12.7 mm | > 550 kN | > 450 kN | 0.63 kg/pcs |
| R51L | 75 mm | 70 mm | 47*1.5/12.7 mm | > 550 kN | > 450 kN | 1.60 kg/pcs |
| R51N | 75 mm | 90 mm | 47*1.5/12.7 mm | > 800 kN | > 630 kN | 2.00 kg/pcs |
| Domed Nuts | Key Size (across flats) | Length | Dome Diameter | Basic Thread Size | Ultimate Load | Tensile Load | Weight |
|---|---|---|---|---|---|---|---|
| T30 | 46 mm | 41 mm | 56 mm | 26*2.2/13.2 mm | > 320 kN | > 260 kN | 0.38 kg/pcs |
| T40 | 60 mm | 68 mm | 74 mm | 37*2.2/13.2 mm | > 660 kN | > 525 kN | 1.01 kg/pcs |
| T52 | 75 mm | 70 mm | 90 mm | 49.5*1.5/13.2 mm | > 930 kN | > 730 kN | 1.80 kg/pcs |
| Hex Nuts | Key Size (across flats) | Length | Basic Thread Size | Ultimate Load | Tensile Load | Weight |
|---|---|---|---|---|---|---|
| T30 | 46 mm | 41 mm | 26*2.2/13.2 mm | > 320 kN | > 260 kN | 0.35 kg/pcs |
| T40 | 60 mm | 68 mm | 37*2.2/13.2 mm | > 660 kN | > 525 kN | 0.95 kg/pcs |
| T52 | 75 mm | 70 mm | 49.5*1.5/13.2 mm | > 930 kN | > 730 kN | 1.56 kg/pcs |
| Domed Nuts | Key Size (across flats) | Length | Dome Diameter | Basic Thread Size | Ultimate Load | Tensile Load | Weight |
|---|---|---|---|---|---|---|---|
| T76 | 100 mm | 85 mm | 120 mm | 70*3.1/12.7 mm | > 1900 kN | > 1500 kN | 2.85 kg/pcs |
| T103N | 125 mm | 90 mm | 150 mm | 96*3.1/12.7 mm | > 2300 kN | > 1800 kN | 4.2 kg/pcs |
| T103S | 145 mm | 120 mm | 170 mm | 96*3.1/12.7 mm | > 3700 kN | > 2600 kN | 9.45 kg/pcs |
| Hex Nuts | Key Size (across flats) | Length | Basic Thread Size | Ultimate Load | Tensile Load | Weight |
|---|---|---|---|---|---|---|
| T76L | 100 mm | 60 mm | 70*3.1/12.7 mm | > 1200 kN | > 1000 kN | 2.00 kg/pcs |
| T76N | 100 mm | 70 mm | 70*3.1/12.7 mm | > 1600 kN | > 1200 kN | 2.32 kg/pcs |
| T76M | 100 mm | 80 mm | 70*3.1/12.7 mm | > 1700 kN | > 1300 kN | 2.65 kg/pcs |
| T76S | 100 mm | 90 mm | 70*3.1/12.7 mm | > 1900 kN | > 1500 kN | 3.00 kg/pcs |
| T103N | 125 mm | 90 mm | 96*3.1/12.7 mm | > 2300 kN | > 1800 kN | 3.95 kg/pcs |
| T103S | 145 mm | 120 mm | 96*3.1/12.7 mm | > 3700 kN | > 2600 kN | 9.10 kg/pcs |
| T111 | 150 mm | 120 mm | > 3650 kN | > 2750 kN | 9.30 kg/pcs |
Features of Rayon Nuts:
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Made from high-precision tempered steel with a spherical end.
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Stronger than the anchor bars themselves.
- Hot-dip galvanized finish available for all nuts.
Standards & Compliance
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ISO 9001 certified manufacturing
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ASTM / EN material standards compliance
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Compatible with international SDA systems
Notes for Export
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Technical parameters can be customized per project specifications
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Can supply with OEM branding for international clients
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Available in bulk and cut-to-length options
