Fasteners & Bolts – Hex Bars for Nuts, Bolts & Studs | Inox Steel India
Inox Steel India is a manufacturer, supplier, and exporter of hex bars for fasteners and bolts, supplying controlled-quality hexagonal bar stock for the production of nuts, bolts, studs, anchors, and threaded fasteners across India, GCC countries, the Middle East, Africa, Europe, and the Americas.
Hex bars used for fastener manufacturing are supplied with accurate hex profile, close dimensional tolerance, and consistent mechanical properties to ensure reliable thread rolling, machining, and forming. These bars are selected to meet fastener-grade requirements across automotive, construction, industrial, and engineering sectors.
Inox Steel India supplies fastener-grade hex bars across carbon steel, alloy steel, stainless steel, duplex, tool steel, nickel alloys, and titanium, manufactured and processed as per applicable ASTM, ASME, EN, DIN, and IS standards.
Hex bars for fasteners are solid hexagonal bars specifically processed for manufacturing nuts, bolts, and studs. Compared to general-purpose hex bars, fastener-grade hex bars emphasize profile accuracy, straightness, surface condition, and metallurgical consistency.
These bars are commonly supplied in bright (cold drawn), polished, or forged condition, depending on the fastener size, strength class, and end-use application.
⚙ How Hex Bars Are Prepared for Fastener Manufacturing
Hex bars for fasteners are processed to meet the requirements of thread rolling, machining, and forming operations.
Preparation Route:
1️⃣ Selection of Suitable Grade & Standard
Material is selected based on required strength class and corrosion resistance.
2️⃣ Cold Drawing / Forging / Polishing
Bars are processed to achieve accurate hex profile and surface quality.
3️⃣ Heat Treatment (As Required)
Annealing, quenching & tempering, or solution annealing is applied to achieve target properties.
4️⃣ Straightening & Cutting
Bars are straightened and supplied in standard or custom cut lengths.
5️⃣ Inspection & Traceability
Dimensional checks, mechanical consistency, and heat number identification are verified.
These characteristics ensure dimensional stability, production efficiency, and reliable fastener performance.
🧩 Materials Commonly Used for Fasteners & Bolts
Hex bars for fasteners are supplied in multiple material categories, including:
Material selection depends on strength class, corrosion exposure, and application environment.
When selecting hex bars for nuts, bolts, and studs, the following parameters should be evaluated:
1️⃣ Fastener Strength Class Requirement
2️⃣ Thread Rolling vs Machining Process
3️⃣ Surface Finish and Tolerance
4️⃣ Heat Treatment Condition
5️⃣ Compliance with Applicable Standards
Correct selection ensures consistent fastener quality and long service life.
🌍 Usage & Demand Overview
In India, fastener-grade hex bars are widely used by nut and bolt manufacturers, automotive fastener suppliers, construction hardware producers, and industrial fastener OEMs, particularly in regions such as Ludhiana, Rohtak, Pune, Chennai, and Ahmedabad.
Export demand is driven by automotive, infrastructure, and industrial fastener markets requiring certified and traceable hex bar stock.
⚙ Applications and Technical Specifications
Fastener-grade hex bars supplied by Inox Steel India are engineered for thread rolling, machining, and forming operations where hex accuracy, straightness, and metallurgical consistency are critical to fastener performance and batch repeatability.
Nuts Manufacturing
Service Use: Accurate hex profile and uniform hardness for tapping/threading.
Typical Applications: Hex nuts, lock nuts, special nuts.
Industry Sectors: Fasteners | Automotive | Construction Hardware
Bolts & Screws
Service Use: Controlled chemistry and straightness for rolling/machining threads.
Typical Applications: Hex bolts, machine screws, anchor bolts.
Industry Sectors: Automotive | Infrastructure | Industrial Assembly
Studs & Threaded Rods
Service Use: Consistent mechanical properties along length.
Typical Applications: Stud bolts, double-end studs, threaded rods.
Industry Sectors: Oil & Gas | Power | Heavy Engineering
📐 Sizes, Tolerances & Supply Condition
Fastener hex bars are supplied with fastener-grade tolerances to support high-volume production.
(Refer to standard hex bar sizes in mm PDF and hex bar size chart in mm India for nominal dimensions.)
⚖ Weight Reference (Indicative)
| AF Size (mm) | Approx. Weight (kg/m) |
|---|---|
| 8 | 0.43 |
| 10 | 0.68 |
| 12 | 0.98 |
| 16 | 1.74 |
| 20 | 2.72 |
| 25 | 4.25 |
| 30 | 6.11 |
Indicative values; actual weight depends on material grade and finish.
💰 Pricing Considerations (Indicative)
Pricing for fastener-grade hex bars depends on:
Note: Fastener-grade processing may carry a premium over general hex bars due to tighter tolerances and quality controls.
🔢 HSN / HS Code
HSN Code: As per base material
(Commonly 7215 / 7222 / 7228 depending on alloy category)
Fastener hex bars are inspected to ensure process suitability and consistency.
Testing includes:
Material can be supplied with EN 10204 3.1 / 3.2 certification on request.
🏭 Why Choose Inox Steel India
Inox Steel India supplies fastener-grade hex bars with controlled metallurgy, precise hex geometry, and consistent straightness to support high-volume production of nuts, bolts, and studs. Processing and inspections are aligned to fastener manufacturing requirements for repeatability and reliability.
Key supply features:
🧩 Industries Served
Fastener-grade hex bars are supplied to:
Material selection is aligned with strength class, corrosion exposure, and forming method (thread rolling vs machining).
📦 Packaging & Supply
Hex bars for fasteners are packed to preserve straightness and surface quality:
Dispatch supported through JNPT (Mumbai), Mundra, and Hazira ports for exports.
Typically 6 mm to 60 mm, depending on fastener size and standard. Yes, custom cut lengths are available to improve production efficiency. Material and processing can be aligned to applicable ASTM, EN, DIN, and IS fastener requirements. Yes, heat number traceability and EN 10204 certification are maintained. What AF size range is commonly used?
Can hex bars be supplied in custom cut lengths for fastener lines?
Are fastener standards supported?
Is certification available after cutting?