Fastners

Rajsuri Industries is a leading Manufacturer and Exporter of high-quality Fasteners, engineered to meet the highest industry standards. Headquartered in Mumbai, India, we specialize in delivering precision-crafted fasteners known for their superior strength, durability, and performance across a wide range of industrial and construction applications.

Our fasteners are manufactured using top-grade raw materials such as Stainless Steel, Carbon Steel, Alloy Steel, Duplex & Super Duplex Steel, and other specialty alloys. Each product undergoes rigorous quality control measures and non-destructive testing (NDT) to ensure exceptional mechanical properties, corrosion resistance, and precise dimensional accuracy.

Rajsuri Industries offers a diverse selection of fasteners, including bolts, nuts, washers, screws, anchors, and rivets, designed for demanding operations in industries such as Construction, Power Plants, Petrochemical, Marine, Oil & Gas, Heavy Engineering, and Infrastructure.

We adhere to both National and International Standards, guaranteeing that our fasteners provide outstanding strength, safety, and reliability. With a commitment to innovation and technical excellence, we ensure that our fasteners deliver secure, leak-proof connections for a variety of industrial needs.

At Rajsuri Industries, we take pride in offering customized fastener solutions tailored to meet the unique requirements of specific projects. Our fasteners not only improve the structural integrity of various applications but also offer cost-effective, long-lasting solutions that reduce maintenance and enhance overall operational efficiency.


Available Grades of Fasteners

Material Standard Grade Type Coating
Stainless Steel ASTM A193 / A194 B8, B8M Bolts, Nuts, Washers Passivated, Zinc Plated
ISO 3506 A2, A4 Screws, Studs Electropolished
DIN 933 / 934 SS 304, SS 316 Hex Bolts, Hex Nuts Self-Color
Carbon Steel ASTM A307 Grade A, Grade B Bolts, Nuts Black Oxide, HDG
ASTM A325 Type 1, Type 3 Structural Bolts Phosphate Coated
Alloy Steel ASTM A193 B7, B7M Studs, Heavy Hex Nuts Teflon Coated
Duplex Steel ASTM A479 2205, 2507 Bolts, Nuts Plain Finish
Nickel Alloy ASTM B166 Inconel 600, Monel 400 Screws, Nuts Nickel Plated

Types of Fasteners

Hex Bolts are one of the most commonly used fasteners, designed for high-strength and secure fastening in various industrial and construction applications. Featuring a six-sided head, these bolts provide excellent grip and torque for easy installation using a wrench or socket. Hex Bolts are available in multiple materials, coatings, and sizes, making them suitable for industries such as construction, automotive, machinery, and heavy engineering.

Key Features

  • Features a six-sided head for easy tightening with a wrench or socket.

  • Available in various materials, including stainless steel, carbon steel, alloy steel, and specialty alloys.

  • Suitable for high-stress applications in construction, automotive, and heavy machinery.

Stud Bolts are fully threaded or partially threaded fasteners used for high-strength clamping applications in various industries. Unlike conventional bolts, they do not have a head and are designed to be used with two nuts for a secure fastening. These bolts are widely utilized in flanged connections, pressure vessels, pipelines, and structural applications requiring strong, reliable joints.

Key Features

  • Available in different sizes ranging from M3 to M56 and custom sizes as per industry requirements.

  • Available in various materials, including stainless steel, carbon steel, alloy steel, and exotic alloys.

  • Manufactured as per DIN, ASTM, BS, and other international standards.

Hex Nuts are six-sided internally threaded fasteners used in conjunction with bolts, screws, and studs to create secure and strong connections. Designed for high-strength fastening, these nuts provide excellent torque resistance and load distribution. Hex Nuts are available in various materials, finishes, and sizes, making them suitable for industries such as construction, automotive, machinery, and heavy engineering.

Key Features

  • Provides excellent load distribution and torque resistance for high-strength applications.

  • Six-sided internally threaded design for secure fastening with bolts and studs.

Socket Head Cap Screws are high-strength fasteners designed for applications requiring precise and secure tightening. Featuring a cylindrical head with an internal hexagonal drive, these screws allow for easy installation in confined spaces using an Allen wrench or hex key. They are widely used in industries such as aerospace, automotive, machinery, and heavy engineering due to their superior tensile strength and reliable performance.

Key Features

  • Cylindrical head with an internal hexagonal drive for precise torque control.

  • Ideal for applications requiring strong, reliable fastening in limited space.

  • Made from high-strength materials such as stainless steel, alloy steel, and titanium.

Machine Screws are precision-threaded fasteners designed for secure and reliable assembly in metal, plastic, and other materials. These screws typically feature a uniform diameter and are used with tapped holes or nuts for fastening applications. Machine Screws are available in a variety of head styles, drive types, and materials, making them ideal for applications in electrical, automotive, machinery, and industrial equipment industries

Key Features

  • Precision-threaded design for use with tapped holes or nuts in assembly applications.

  • Offered in various drive types, including Phillips, slotted, Torx, and hex.

  • Available in multiple head styles, including flat, pan, round, and oval heads.

Washers are thin, disk-shaped components used to distribute the load of a fastener, reduce friction, and prevent loosening in mechanical assemblies. They come in various types, including flat washers, spring washers, and lock washers, each serving a specific function. Washers are widely used in industries such as construction, automotive, machinery, and electronics to enhance fastening performance and durability.

Key Features

  • Evenly distributes load and prevents surface damage from fasteners.

  • Available in different types, including flat washers, spring washers, and lock washers for specific applications.

  • Enhances fastening reliability by reducing friction and preventing loosening due to vibrations.

Spring Washers are specially designed fasteners that provide tension and prevent loosening in bolted assemblies subjected to vibrations and dynamic loads. These washers apply a continuous force to maintain secure fastening, reducing the risk of fastener loosening over time. Available in various designs, including split, conical, and wave washers, they are widely used in industries such as automotive, machinery, aerospace, and construction.

Key Features

  • Provides tension and prevents loosening in bolted assemblies.

  • Made from stainless steel, carbon steel, alloy steel, and phosphor bronze for enhanced durability.

  • Ideal for use in high-vibration environments such as machinery, automotive, and aerospace industries.

U-Bolts and J-Bolts are specialized fasteners designed for securing pipes, cables, and structural elements in various industrial applications. U-Bolts have a U-shaped design with threaded ends, making them ideal for clamping cylindrical objects, while J-Bolts feature a J-shaped hook for anchoring and hanging components. These bolts are commonly used in construction, automotive, plumbing, and marine industries due to their robust holding strength and versatility.

Key Features

  • J-Bolts are designed for anchoring and hanging structural components.

  • U-Bolts provide secure clamping for pipes, poles, and round bars.

  • Manufactured from stainless steel, carbon steel, alloy steel, and galvanized steel for durability and corrosion resistance.

Anchor Bolts are heavy-duty fasteners designed to secure structures and equipment to concrete foundations. These bolts provide strong, stable anchoring and are essential for ensuring structural integrity in construction and industrial applications. Available in different types such as L-shaped, J-shaped, wedge, and sleeve anchor bolts, they are widely used in bridges, buildings, machinery, and infrastructure projects.

Key Features

  • Provides secure anchoring of structures and equipment to concrete foundations.

  • Made from high-strength materials such as stainless steel, carbon steel, and galvanized steel for corrosion resistance.

  • Available in various types, including L-bolts, J-bolts, wedge anchors, and sleeve anchors.

Wing Screws are specialized fasteners designed for tool-free manual tightening and loosening. Featuring large wing-like projections on the head, they allow for easy grip and quick adjustments without requiring additional tools. These screws are widely used in applications requiring frequent assembly and disassembly, such as industrial equipment, machinery, electronics, and furniture.

Key Features

  • Features wing-like projections for easy hand tightening without tools.

  • Ideal for applications requiring quick assembly and frequent adjustments.

  • Made from durable materials such as stainless steel, carbon steel, brass, and plastic for various environments.

Eye Bolts are heavy-duty fasteners featuring a looped head designed for lifting, securing, and anchoring applications. These bolts provide a reliable attachment point for ropes, cables, and chains in construction, marine, rigging, and industrial applications. Available in different types such as plain eye bolts, shoulder eye bolts, and swivel eye bolts, they ensure strong and stable connections in heavy-load conditions.

Key Features

  • Designed with a looped head for secure attachment of ropes, cables, and chains.

  • Available in various types, including plain eye bolts, shoulder eye bolts, and swivel eye bolts for different applications.

  • Manufactured from high-strength materials such as stainless steel, carbon steel, alloy steel, and galvanized steel for durability and corrosion resistance.

Foundation Bolts are specialized fasteners used for anchoring heavy structures to concrete foundations. These bolts provide exceptional strength and stability, making them essential for securing machinery, steel structures, and industrial equipment. Available in various types, such as L-shaped, J-shaped, U-shaped, and straight anchor bolts, they are widely used in construction, power plants, bridges, and heavy engineering applications.

Key Features

  • Designed for securing heavy structures and equipment to concrete foundations.

  • Available in different types, including L-bolts, J-bolts, U-bolts, and straight anchor bolts for various applications.

  • Ideal for use in construction, bridges, power plants, and industrial foundations.

Structural Bolts are high-strength fasteners designed for connecting steel-to-steel components in construction and industrial applications. These bolts are commonly used in bridges, buildings, and heavy machinery where load-bearing capacity and durability are essential. Structural bolts are available in various grades and coatings to enhance strength, corrosion resistance, and longevity.

Key Features

  • Available in different grades such as ASTM A325, A490, and DIN 6914 for heavy-duty performance.

  • Provides exceptional tensile and shear strength for load-bearing structures

  • Designed for high-strength applications in steel construction and structural frameworks.

T-Head Bolts are specialized fasteners with a T-shaped head designed to fit into T-slots or channels, providing a secure and adjustable fastening solution. These bolts are widely used in construction, machinery, and industrial assemblies where quick and precise positioning is required. T-Head Bolts offer strong and reliable connections in applications such as machine tool fixtures, rail systems, and structural frameworks.

Mushroom Head Square Neck Bolts are specialized fasteners featuring a low-profile, dome-shaped head with a square neck under the head. The square neck prevents rotation during installation, ensuring a secure and stable fit. These bolts are commonly used in timber construction, railway tracks, and metal structures where a flush finish and strong hold are required.