Aanuraj Fasteners Private Limited
Vasai, Palghar, Maharashtra
GST No. 27AARCA3096L1Z0
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Product Details:
| Diameter | 20 mm |
| Material | High Tensile Steel |
| Grade | Grade 10S |
| Nut Type | High Tensile |
| Size | M20 |
| Country of Origin | Made in India |
| Availabilyty | Exstock |
1. Standard & Grade
IS 6623: Indian Standard for High Strength Structural Nuts
Property Class: 10S (equivalent to ISO 898-2, Grade 10)
Material: Medium carbon alloy steel, heat-treated (quenched & tempered)
2. Chemical Composition (Typical Range as per IS 6623 / ISO 898-2)
| Element | % (Approx.) |
|---|---|
| Carbon (C) | 0.25 – 0.55 |
| Manganese (Mn) | 0.50 – 1.00 |
| Phosphorus (P) | ≤ 0.035 |
| Sulphur (S) | ≤ 0.035 |
| Boron (B) | 0.003 – 0.005 |
| Others (Mo/Cr/Ni) | As required for strength |
3. Mechanical Properties – IS 6623 (Class 10S Nuts)
| Property | Requirement |
|---|---|
| Proof Load Stress (MPa) | 830 min |
| Tensile Strength (MPa) | 1040 – 1220 |
| Hardness (HBW) | 320 – 370 |
| Impact Strength (Charpy V) | ≥ 27 J at room temp |
| Surface Finish | Blackened / Galvanized / HDG / Phosphated |
4. Applications of High Strength Structural Nuts (IS 6623 10S)
Steel Structures – Bridges, towers, heavy industrial sheds
Infrastructure Projects – Metro, railways, airports, highways
Construction – High-rise buildings, stadiums, power plants
Oil & Gas, Refineries – For structural bolted joints
Heavy Engineering – Equipment foundations requiring vibration resistance
5. Why Choose Aanuraj Fasteners for IS 6623 10S Structural Nuts?
✅ Precision Manufacturing: Forged and CNC-machined for accuracy in fit.
✅ Certified Materials: Manufactured from tested alloy steels with mill certificates.
✅ Heat Treatment Excellence: Quenched & tempered for required hardness & toughness.
✅ Quality Assurance: Proof load, hardness, and metallurgical testing as per IS standards.
✅ Surface Protection: Available in zinc plated, hot dip galvanized, and black oxide finish.
✅ Trusted in Projects: Widely supplied for infrastructure, bridges, and heavy structural applications across India.
⚡ Conclusion:
Aanuraj Fasteners Pvt Ltd supplies IS 6623 High Strength Structural Nuts – 10S that guarantee safety, reliability, and durability in critical structural connections. Our nuts are engineered to match high tensile structural bolts (IS 3757, Grade 10.9S), ensuring performance in heavy-duty construction and infrastructure projects.