Fasteners are mechanical components used to join or secure two or more objects together. They come in various shapes and sizes and are essential in a wide range of industries, including construction, automotive, aerospace, electronics, and manufacturing. Here's an overview of fasteners, including materials, features, applications, and advantages:

Common Materials:

Stainless Steel: Known for its corrosion resistance and strength, stainless steel fasteners are commonly used in applications where durability and aesthetic appearance are important, such as marine, construction, and food processing industries.

Nickel Alloys: These alloys offer excellent corrosion resistance, high temperature resistance, and strength. They are often used in chemical processing, aerospace, and marine applications where harsh environments are present.

Copper Alloys: Copper fasteners are valued for their excellent electrical conductivity, corrosion resistance, and antimicrobial properties. They find applications in electrical and electronic industries, as well as in plumbing and roofing.

Aluminium Alloys: Aluminium fasteners are lightweight and corrosion-resistant, making them suitable for applications where weight reduction and corrosion resistance are critical, such as aerospace, automotive, and construction industries.

Titanium Alloy: Titanium fasteners are known for their high strength-to-weight ratio, corrosion resistance, and biocompatibility. They are commonly used in aerospace, marine, and medical applications where high strength and corrosion resistance are required.


Manufacturing Process Of Fasteners

Cold Forging

Cold forging increases the strength and durability of fasteners by aligning the grain structure of the metal, resulting in superior mechanical properties

Hot Forging

Hot forging fasteners involves heating metal until it becomes malleable and then shaping it into the desired form using dies or molds.


Machining fasteners involves the production of various types of fasteners, such as screws and bolts, through machining processes like CNC machining.

Thread Forming

Thread forming fasteners, also known as thread rolling screws or thread-forming screws, create threads within a pre-drilled hole rather than cutting threads like traditional screws.

Cold forming of Nuts

Cold forming of nuts involves the process of shaping metal blanks into nuts at room temperature or slightly above.

Heat And Surface Treatment

Fastener heat treatment processes like hardening and tempering improve their mechanical properties, such as strength and toughness, by subjecting them to controlled heating and cooling cycles.

Features of Fasteners:

Thread Type: Fasteners can have various thread types such as machine threads, self-tapping threads, and wood threads, each designed for specific applications.
Head Types: Fasteners can have different head types including hexagonal, Phillips, slotted, and socket heads, providing versatility in installation and removal.
Coatings: Many fasteners come with coatings like zinc plating, galvanization, or organic coatings to enhance corrosion resistance and improve appearance.
Strength Class: Fasteners are often classified based on their strength, with grades such as ASTM A193 for bolts and ASTM F593 for stainless steel bolts.

Applications of Fasteners:

Construction: Fasteners are used in building structures, bridges, and roads.
Automotive: Fasteners hold together various components in vehicles, from chassis to interior trim.
Aerospace: Critical applications in aircraft construction require high-performance fasteners.
Electronics: Fasteners secure components in electronic devices and circuitry.
Manufacturing: Fasteners are used in assembly lines for various consumer and industrial products.

Advantages of Fasteners:

Versatility: Fasteners come in various types and sizes, making them suitable for a wide range of applications.
Ease of Installation: Fasteners are relatively easy to install and remove, facilitating assembly and maintenance processes.
Strength and Durability: Depending on the material chosen, fasteners can offer high strength and durability, ensuring long-term performance in demanding environments.
Corrosion Resistance: Many fastener materials, such as stainless steel, nickel alloys, and titanium, offer excellent resistance to corrosion, prolonging the lifespan of the joint.
Cost-Effectiveness: Fasteners provide a cost-effective solution for joining components compared to welding or adhesive bonding methods.

Calico Metal Alloy Pvt Ltd stands out as a premier supplier and exporter of fasteners for several compelling reasons. With an unwavering commitment to quality, we deliver fasteners crafted from top-grade materials, ensuring durability and reliability in every product. Our extensive range caters to diverse industry needs, offering solutions for various applications. Moreover, we prioritize customer satisfaction, providing prompt and efficient services backed by our knowledgeable team. Transparency, integrity, and adherence to international standards define our operations, fostering trust and long-term partnerships with clients worldwide. Choose Calico Metal Alloy Pvt Ltd for unparalleled quality, extensive selection, and exceptional service in the fastener industry.

Fasteners Specifications

Bolt / Screw Size M3 – M56 | 3/6″ to 2″ | Custom Sizes
Nuts Size M3 – M56 | 3/6″ to 2″ | Custom Sizes
Washers Size M3 – M56 | 3/6″ to 2″ | Custom Sizes
Machine Screws Size M1.6 – M12
Self Tapping Screw Size No.2 – No. 14
Length 3 mm to 200 mm
Threads UNF, BSW, BSF, METRIC, UNC, or as required
  • DIN : DIN 934, DIN 931, DIN 970, DIN 933
  • ISO : JIS standards, ISO 4033, ISO 4032,
  • ANSI – American National Standards Institute
  • ASME B18.5
  • ANSI B 28.2.4 1M
  • as per defined in ASME B16.5 standard Stud Bolt length
  • ANSI B 18.2.4 2M
  • as per defined in ASME B18.2.2 Hex nuts
Form Hex, Threading, Square, Round as per Gauge Etc.
Raw materials Source JSPL, Mukund Steel, Tata Steel, Dhamm Steel, Usha Martin,etc.
Threads Configuration ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads
Certification Dual Certified As per ASTM & ASME Codes
Dimensions DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3
Threads Unless otherwise specified, the threads shall be rolled or cut and tapped horizontally or vertically
Test Certificate as per EN 10204 / 3.1 Manufacturer Test Certificate
Additional Certifications PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified
Production Process M24-M100: hot forging , M2-M24: Cold Froging, for custom-made connecting element machining and CNC
Types Bolts, Nuts, Stud Bolts, Washers, Threaded Rod, Anchor Fasteners, Eye Bolt, Stud, Cotter Pin, Socket Screw, Fine Fasteners & Spares, Foundation Fasteners, Hexagon Castle Nuts, Hexagon Domed Cap Bolts, Hexagon Thin Nuts etc.

Types Of Fasteners










Stud Bolts


Anchor Bolts


Other Types Of Fasteners

SS Nut Bolt Duplex Steel U Bolts
Super Duplex Steel Screws Inconel Hex Head Bolts
Monel Washers Stainless Steel Heavy Hex Bolts
SDSS Carriage Bolts Hastelloy Square Bolts
Copper Anchor Fasteners SS Heavy Hex Nuts
Stainless Steel Socket Set Screws M8 SS Bolts
Duplex Steel Studs SS Nuts And Bolts
Duplex Stainless Steel Eye Bolts Super Duplex Fender Washer

Fastener Industrial Application

Electrical Industry


Automotive Industry


Construction Industry


Defence Industry


Pharmaceutical Industry


Petroleum Industry


Petrochemical Industry


Milk & Dairy Industry

Milk & Dairy

Export & Supply Destinations Of Fasteners

Austria, Azerbaijan, Belarus, Belgium, Bulgaria, Croatia, Cyprus, Czechia/Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Moldova, Monaco, Netherlands, Norway, Poland, Portugal, Romania, Russia, Serbia, Slovakia, Spain, Sweden, Switzerland, Turkey, Ukraine, United Kingdom.

Afghanistan, Armenia, Azerbaijan, Bahrain, Bangladesh, Bhutan, British, China, Egypt, Hong Kong, India, Indonesia, Iran, Iraq, Israel, Japan, Jordan, Kuwait, Kyrgyzstan, Lebanon, Macau, Malaysia, Maldives, Mongolia, Myanmar, Nepal, North Korea, Oman, Philippines, Qatar, Russia, Saudi Arabia, Singapore, South Korea, Sri Lanka, Taiwan, Thailand, Turkey, United Arab Emirates, Vietnam.

Algeria, Angola, Botswana, Burkina Faso, Burundi, Cameroon, Central African Republic, Egypt, Eswatini, Ethiopia, Gambia, Kenya, Liberia, Libya, Madagascar, Mauritania, Mauritius, Morocco, Mozambique, Namibia, Niger, Nigeria, Rwanda, Senegal, Seychelles, South Africa, Tanzania, Tunisia, Uganda, Zambia, Zimbabwe.

Antigua and Barbuda, Bahamas, Barbados, Belize, Canada, Costa Rica, Cuba, Dominica, Dominican Republic, El Salvador, Grenada, Guatemala, Haiti, Honduras, Jamaica, Mexico, Nicaragua, Panama, Saint Lucia, Saint Vincent and the Grenadines, Trinidad and Tobago, United States of America.

Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela.