Special Grade Nuts Manufacturer & Exporter in India

Industrial-Grade Nuts

Ragnar Metals & Tubes is a leading manufacturer and exporter of industrial-grade nuts engineered for high-performance fastening applications across oil & gas, petrochemical, marine, offshore, construction, and power generation industries. Our industrial nuts are designed to provide secure load distribution, vibration resistance, and long-term reliability even under extreme pressure, temperature, and corrosive conditions.

We manufacture precision-machined nuts in metric and imperial sizes, complying with international standards such as ASTM, ASME, DIN, ISO, and EN. Our range includes Hex Nuts, Heavy Hex Nuts, Coupling Nuts, Jam Nuts, Flange Nuts, Nylock Nuts, Slotted Nuts, and other special fastening solutions. Each nut undergoes strict dimensional inspection, thread gauging, hardness testing, and quality control procedures to ensure perfect fitment, superior tensile strength, and extended service life in critical industrial assemblies.

Material Grades

Our industrial nuts are manufactured using premium-quality raw materials sourced from approved mills to ensure maximum strength, corrosion resistance, and durability. We offer a comprehensive range of material grades suitable for both general-purpose and high-performance industrial applications.

• Stainless Steel: 304, 304L, 316, 316L, 310, 321, 347 – Excellent corrosion resistance for marine, chemical, and food-grade environments
• Duplex & Super Duplex: UNS S31803, S32205, S32750, S32760 – High mechanical strength with superior resistance to stress corrosion cracking
• Alloy Steel: ASTM A194 2H, 7, 7M – Suitable for high-pressure and high-temperature bolting applications
• Nickel Alloys: Inconel, Monel, Hastelloy – Ideal for extreme temperature and aggressive chemical conditions
• Carbon Steel & Special Custom Grades: As per project specifications and client requirements

All nuts are supplied with EN 10204 3.1 / 3.2 Mill Test Certification and can be provided with hot-dip galvanizing, zinc plating, PTFE coating, black oxide, or other surface treatments based on project needs. Custom threading, special dimensions, and bulk export packaging are also available.

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Hex Nut

We manufacture high-strength Hex Nuts in stainless steel, duplex, alloy steel and nickel alloys. These nuts are widely used in structural and pipeline applications and comply with ASTM A194 and ASME standards.

Hex Jam Nut

Hex Jam Nuts are thinner nuts used for locking purposes. Available in precision threads and various material grades for industrial fastening applications.

Hex Coupling Nut

Hex Coupling Nuts are long nuts designed to connect threaded rods and studs. Supplied in custom lengths and special grades for heavy engineering industries.

Hex Flange Nut

Hex Flange Nuts feature an integrated washer base for better load distribution. Ideal for vibration-resistant applications.

Slotted Nut

Slotted Nuts are designed for use with cotter pins to prevent loosening. Commonly used in automotive and mechanical assemblies.

Nylock Nut

Nylock Nuts include a nylon insert to prevent loosening due to vibration. Widely used in high-movement and mechanical systems.

Acorn Nut

Acorn Nuts (Dome Nuts) provide safety and aesthetic finishing by covering exposed threads. Used in architectural and automotive applications.

Way Lock Nut

Way Lock Nuts are designed for high vibration and heavy-duty industrial fastening systems.

Nylock Jam Nut

Nylock Jam Nuts combine thin profile and nylon locking system for secure fastening in limited-space applications.

Material Grades

Our industrial bolts are manufactured using premium raw materials sourced from approved mills to ensure maximum strength, corrosion resistance, and reliability. We offer a wide range of material grades suitable for both standard and high-performance industrial environments.

• Stainless Steel: 304, 304L, 316, 316L, 310, 321, 347 – Excellent corrosion resistance for marine and chemical environments
• Duplex & Super Duplex: UNS S31803, S32205, S32750, S32760 – High strength and superior resistance to stress corrosion cracking
• Alloy Steel: ASTM A193 B7, B7M, B16 – Ideal for high-pressure and high-temperature applications
• Nickel Alloys: Inconel, Monel, Hastelloy – Suitable for extreme temperature and aggressive chemical conditions
• Carbon Steel & Special Custom Grades: As per client specifications and project requirements

All bolts are available with EN 10204 3.1 / 3.2 Mill Test Certification and can be supplied with custom coatings, galvanizing, PTFE coating, or other surface treatments as per project requirements.

Looking for custom sizes or bulk export supply? Contact our sales team today.

Standards & Specifications

• ASTM A194 / ASME B18.2.2
• DIN / EN / ISO Standards
• Custom dimensions as per client drawings
• Metric and UNC/UNF thread options

Applications

Our special grade nuts are widely used in:

• Oil & Gas Industries
• Petrochemical & Refineries
• Power Plants
• Marine & Offshore Engineering
• Construction & Heavy Engineering

Why Choose Ragnar Metals & Tubes for Industrial Nuts?

We are a globally trusted nuts manufacturer in India offering precision-engineered fastening solutions for critical industrial applications. Our nuts undergo strict quality testing, dimensional inspection and third-party verification to ensure superior mechanical strength and corrosion resistance.

• In-house quality inspection
• EN 10204 3.1 / 3.2 Certification
• Custom coating & plating available
• Export packaging for global shipment
• Competitive bulk pricing

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Frequently Asked Questions (FAQs)