Aanuraj Fasteners Private Limited
Vasai, Palghar, Maharashtra
GST No. 27AARCA3096L1Z0
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HSFG stands for High Strength Friction Grip. Where a standard commercial bolt will stop the plates in a connection from moving apart by supporting the weight on the bolt shank in the form of shear stress, an HSFG supports the weight by clamping the plates so tightly together that they can’t slip past each other.
In other words, the friction generated between the plates is equal to the force being put on the plate by the weight of the beam it supports.
To make sure that the plates don’t slip past each other, the bolt needs to be carefully preloaded.
Product Details:
| Diameter | 16 mm |
| Material | High Tensile Steel |
| Grade | 10S |
| Nut Type | High Tensile |
| Size | M10 |
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.
Product Details:
| Size | 36 |
| Brand | RAJ |
| Material | Mild Steel |
| Surface Finish | Electroplated |
| Usage/Application | Construction |
| Shape Type | Round Plain |
| Standard | DIN 125 |
Product Details:
| Size | ASTM A 194 GRADE 2H HDG HEAVY HEX NUTS |
| Material | High Tensile Steel |
| Brand | RAJ |
| Shape | HEX |
| Nut Type | HEX |
| Standard | ASME B18.2.2 |
| Packaging Type | BOX |
| Country of Origin | Made in India |
Product Details:
| Diameter | 30 mm |
| Material | High Tensile Steel |
| Grade | Grade 10S |
| Nut Type | High Tensile |
| Size | M27 |
| Country of Origin | Made in India |
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.