• At Metallica, we supply the market with top quality stainless steel and marine grade fasteners. We offer exceptional durability and competitive prices when it comes to 18-8, 304 or 316 grade stainless steel fasteners. Metallica provides the value added services, such as the heat treating, cutting, machining, painting and assembly. Stainless steel fasteners are specified to BS EN ISO 3506. Various kinds sizes of fasteners are available: M2-M100.
  • Stainless Steel Fasteners Available on Sale, by India’s Largest Stockholder and Manufacturer. Metallica makes it easy for you to source top quality stainless steel fasteners at the lowest prices in India. We specialize in providing deliveries to your factory directly from our warehouse or our principal suppliers.
  • Metallica is a supplier of a huge range of chrome plated and stainless steel fasteners in Metric, Metric Fine, UNF, UNC, BA, BSF and BSCY (cycle) threads.
  •  We welcome our customers to purchase high quality stainless steel fasteners in stock at cheap price from our factory. For customized and OEM services, contact us now.
  • The Steel Pipes Factory, Metallica Group is established since 1975 and is known for providing competitive prices, high-quality technical services and on-time delivery. We have more than 15 advanced production lines and advanced testing equipment for quality inspection and quality assurance. The use of advanced technology, scientific management model, and professional technical personnel ensure the excellent quality of each branch. Advanced production equipment, scientific and standardized management, strict quality assurance system and high-quality core team are the core competitiveness of the company.
Stainless Steel Fasteners Manufacturer, Wholesaler, Dealer, Supplier, Stockist and Distributor In India and Abroad
  • As one of the largest manufacturer of Stainless Steel Fastener, we have over 6000 tons in stock

  • Stainless Steel Fasteners Available at around Rs. 200/KG for Sale in India.

  • Our Annual Sales Volume for Stainless Steel Valves is Over 25,000 tons in India and Overseas.

  • Stainless Steel Pipes and Tubes, are Sold with Complete Range of Related Pipe Fittings and Flanges

  • On-Time Delivery with Quality Assurance and Price Guarantee for Stainless Steel Fasteners

  • Email Us on sales@metallicametals.com | Call Us On +918928722715.

Buy High Quality Stainless Steel Fasteners at Best Competitive Price! Stainless Steel Fasteners on Sale! 

Types of Stainless Steel Fasteners

Most stainless steel fasteners are much less magnetic than regular steel fasteners though some grades will be slightly magnetic.

201    (1Cr17Mn6Ni5N) 202    (1Cr18Mn8Ni5N)
304    (0Cr18Ni9) 304L  (00Cr18Ni10)
316    (0Cr17Ni12Mo2) 316L   (0Cr17Ni14Mo2)
321/321H 409
409L 430

Parts of Stainless Steel Fasteners

  1. Nuts – Used with a bolt and washer to create a joint. It is considered a temporary joint because it can be easily removed.
  2. Bolts – Held on by a nut, typically with a shoulder, bolts have a much higher strength than screws and are used when removing the connection is likely.
  3. Washers – Used typically on the nut side of a nut and bolt assembly to provide the nut with a flat and smooth surface to fasten against. They can also protect the material surface.
  4. Screws – Used to hold materials together and considered permanent, screws hold themselves into the materials they are installed in without a nut.
    Types of Fastener Head

    Types of Fastener Head

  5. Rivets – Considered a permanent install, rivets hold materials together by expanding on one side of the hole resulting in a firm hold.
  6. Anchors – Typically permanent. Most are placed in a hole and somehow expanded to fill the hole and prevent pull-through
  7. Retaining Rings – A ring the is either expanded or compressed and fit into a recess on a shaft. They are commonly used on shocks to hold springs under pressure.
  8. Dowel Pins – A cylindrical metal pin used in machinery to keep pieces in place.
  9. Security Screws – Serve the Same functionality as screws but with unusual head styles that may add extra security to your assembly

Note: There are many kinds of each fastener that can serve different purposes. For example sheet metal screws have sharp cutting threads that will easily cut through soft metals where as a wood screw is used primarily in wood to wood applications.

Stock Range of Stainless Steel Fasteners

Product Stainless Steel Fasteners
Standard DIN, ISO, JIS, GB, IS, BS, ASTM
Length 3 mm to 200mm
Size Range M02 to M33
Form Square, Round, Threading as per Gauge Etc.
Head Drive Phillips, Slotted, Phillips/Slot, Six-Lobe, etc.
Types Stainless Steel Fasteners, Bolts (Eyebolt),  Stud, Nuts (Nylock, Lock), Washer (Star, Plain), Allen Caps, Screws (CSK, Pen Head, Philip, Mushroom, Cheese), Clamp (U, J, L), Grab, Rivet (Pop & Hollo) Etc.
Material Available Stainless Steel, High Tensile, Nickel Alloy, Alloy Steel, Mild Steel, Copper, Brass, Aluminium
Nickel Alloy Hastelloy, Cupro Nickel, Nickel, Monel, Inconel, Alloy 20 Etc.
Packing Wooden cases or wooden pallet or as per customers requirement
Delivery Time 25 days after order conformed
Payment By T/T or L/C
Test Certificate Manufacturer Test Certificate as per EN 10204 / 3.1

What is a Fastener?

Fastener Terminology

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A fastener or fastening is a hardware device that mechanically joins or affixes two or more objects together. In general, fasteners are used to create non-permanent joints; that is, joints that can be removed or dismantled without damaging the joining components. Welding is an example of creating permanent joints. Steel fasteners are usually made of stainless steel, carbon steel, or alloy steel.

What are the Applications of Stainless Steel Fasteners?

  • Components that are exposed to saltwater, chemicals or other corrosive environments
  • High wear parts
  • Sanitary equipment
  • Components that are exposed to high heat and high stress
  • Components that require superior strength and stability.
  • Fasteners are widely used in various industries, including energy, electronics, electrical appliances, machinery, chemical industry, metallurgy, dies, hydraulic and other industries.

Standards for Stainless Steel Fasteners

The American Society of Mechanical Engineers (ASME) publishes several Standards on fasteners. Some are:

  • B18.3 Socket Cap, Shoulder, Set Screws, and Hex Keys (Inch Series)
  • B18.6.1 Wood Screws (Inch Series)
  • B18.6.2 Slotted Head Cap Screws, Square Head Set Screws, And Slotted Headless Set Screws (Inch Series)
  • B18.6.3 Machine Screws, Tapping Screws, and Metallic Drive Screws (Inch Series)
  • B18.18 Quality Assurance For Fasteners
  • B18.24 Part Identifying Number (PIN) Code System Standard for B18 Fastener Products

Markings on the head of Stainless Steel Fasteners

  1. A manufacturer marking which simply indicated the company that manufactured the fastener.
  2. The strength class which consists of two numbers separated by a decimal point. Common classes are 4.8, 8.8, 10.9, and 12.9. The number of the left indicates 1% of the tensile strength in MPa, or N/mm2. The number on the right indicates the proportion of the yield strength in relation to the tensile strength.

Manufacturing Process of Stainless Steel Fasteners

There are two basic methods for producing fasteners—machining and cold heading—both of which are applicable to stainless steels.

  1. Machining:- Machining is the oldest method of fastener production, and it is still specified for very large diameters and for small production runs. Machining, however, has a drawback,it disrupts metal grain flow and creates planes of weakness in the critical head-to-shank fillet area. The result is some loss in load-carrying ability and a drastic reduction in fatigue resistance.
  2. Cold Heading:- Cold Heading is a method of forming wire into various shapes by causing it to plastically flow into die and punch cavities without preheating the material. Cold heading has many important advantages in both quality and economy.

There are other operations involved in fastener production, such as head slotting, shank slotting (for thread-cutting screws), head drilling, etc. But the making of and threading the blank are the two major processes.

What are the Features and Advantages of Stainless Steel Fasteners?

  • Stainless steel owes its high corrosion resistance to its low carbon steel and chromium content. Fasteners made from stainless steel will not lose their corrosion resistance if scratched during installation or use.
  • Stainless steel is used primarily for long lasting applications, due to its corrosion-resistant nature and durability. Scratching or burring the metal will not create surface rust as the corrosion resistance exists within the metal itself.
  • Stainless is a soft metal due to the low carbon content, therefore most stainless steel bolts are cold-formed and not heat treated or thru-hardened.
  • Cold forming and threading cause stainless bolts to become slightly magnetic, some fasteners will be more magnetic than others depending on size and how quick the cold forming process is.
  • Stainless fasteners are typically a clean silver color, which also makes them common in finishing and decorative applications.
  • Stainless Steel should never be used with aluminum, galvanic corrosion is likely to occur.
  • Stainless steel will not rust due to scratching due to the thin layer of chromium creating an invisible protective layer. This thin layer will rebuild itself in the presence of oxygen. Note: If you are not in an oxygen rich environment the material will take longer to rebuild or not rebuild at all. This will leave it open to possible corrosion.

What are the Disadvantages of Stainless Steel Fastener?

  1. Need to Be Properly Fastened – With stainless steel fasteners you need to make sure that they are properly affixed with spacers or else you run the risk of metal-on-metal corrosion.
  2. Slightly More Expensive – As we’ve stressed above, stainless steel will typically be slightly more expensive than other alternatives. So, equipping your entire project with stainless steel fasteners can be more expensive.

Chemical Composition Of Stainless Steel Fasteners

Chemical Composition %
Grade C Si Mn P S Ni Cr Mo N
201    (1Cr17Mn6Ni5N) ≤0.15 ≤1.0 ≤5.5 ≤0.06 ≤0.03 3.5-5.5 16.0-18.0 ≤0.25
202    (1Cr18Mn8Ni5N) ≤0.15 ≤0.07 ≤7.5 ≤0.06 ≤0.03 4.0-6.0 17.0-19.0 ≤0.25
304    0Cr18Ni9) ≤0.08 ≤0.07 ≤2.0 ≤0.04 ≤0.03 8.0-11.0 18.0-20.0
304L  (00Cr18Ni10) ≤0.03 ≤0.07 ≤2.0 ≤0.04 ≤0.03 8.0-11.0 18.0-20.0
316    (0Cr17Ni12Mo2) ≤0.08 ≤0.07 ≤2.0 ≤0.04 ≤0.03 11.0-14.0 16.0-18.0 2.0-3.0
316L   (0Cr17Ni14Mo2) ≤0.03 ≤0.07 ≤2.0 ≤0.04 ≤0.03 11.0-14.0 16.0-18.0 2.0-3.0
321     ≤0.08 ≤1.0 ≤2.0 ≤0.04 ≤0.03 9.0-12.0 17.0-19.0 Ti≥5xC
409 ≤0.08 ≤1.0 ≤1.0 ≤0.04 ≤0.03 ≤0.5 10.5-11.7 Ti6xC%≤0.70
409L ≤0.03 ≤1.0 ≤1.0 ≤0.04 ≤0.03 0.5 10.5-11.7 Ti8xC%≤0.70
430 ≤0.12 ≤1.0 ≤1.0 ≤0.04 ≤0.03 16.0-18.0

Heat Treatment For Stainless Steel Fasteners

The most common heat treatments in manufacturing fasteners are:
1. Annealing
2. Normalizing (Recrystallization)
3. Stress-relieving
4. Hardening
5. Tempering
6. Quenching and tempering
7. Decarburizing
8. Case carburizing
9. Induction hardening

What are the Various Grades of Stainless Steel, Metallica Deals in?

As one of the biggest stainless steel suppliers in India, we stock and supply all major grades of stainless steel.
Austenitic Stainless Steels
301 High strength for roll formed structural components
304, 304L, 304H Standard 18/8 grades
310, 310S, 310H High temperature resistant grades
316, 316L, 316H Improved resistance to pitting corrosion in chloride environments
321, 321H, 347 Stabilized grades for heavy section welding and high temperature applications
904L High resistance to general corrosion, pitting and stress corrosion cracking
Ferritic Stainless Steels
409 Automotive exhaust grade – weld stabilized
430, 430F Resistant to mildly corrosive environments
439 Resistant to mildly corrosive environments – weld stabilized
444 A ferritic alternative to grade 316 / 316L – weld stabilized
Duplex Stainless Steels
2101 Lean duplex – economical alternative to 304 and 316
2304 Duplex alternative to grade 316
2205 Standard duplex stainless steel – high resistance to pitting and stress corrosion
2507 Super duplex with very high resistance to pitting and stress corrosion
Martensitic Stainless Steels
410 Standard martensitic grade for low-duty hardened applications
416 Free-machining bar grade
420 Higher hardness martensitic grade for cutlery, cutting tools and dies
431 High hardness and toughness grade, primarily for shafting
440A, 440B, 440C Very high hardness grades used in cutting tools
Precipitation Hardening Stainless Steel
630 (17-4PH) High strength shafting grade

What are the Maximum Operating Temperatures of Stainless Steel Grades?

Stainless steels have good strength and good resistance to corrosion and oxidation at elevated temperatures. Stainless steels are used at temperatures up to 1700° F for 304 and 316 and up to 2000 F for the high temperature stainless grade 309(S) and up to 2100° F for 310(S).

Maximum Operating Temperatures of Stainless Steel Grades

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What is the Impact of Various Alloying Elements on the Properties of Stainless Steel?

Element Effect on Stainless Steel
Chromium Forms a passive film with oxygen that prevent the further diffusion of oxygen into the surface
Composition needs to contain at least 10.5% to be a stainless steel
Nickel Increases ductility and toughness. Increase corrosion resistance to acids
Additon creates non-magnetic structure
Molybdenum Increases pitting and crevice corrosin resistance. Increase resistance to chlorides
Copper Increase corrosion resistance to sulfuric acid
Manganese Substitute for nickel (200 series)
Titanium/Niobium Ties up carbon and prevents inter-granular corrosion in welded zone of ferritic grades
Nitrogen Increase strength and corrosion resistance in austenitic and duplex grades
Silicon Improves resistance to high temperature scaling
Sulfur Usually kept low excet for “free-machining” grades
Carbon Usually kept low.  Used in martensitic grades to increase strength and hardness

What are the Steel Pipe Sizes?

Steel pipe sizes

Pipe size is quoted as a “Nominal Pipe Size” or NPS. The origin of the NPS numbers for smaller pipes (< NPS 12) is different to the origin for larger diameter pipes. However, all pipes of a specific NPS number have the same external or outer diameter (OD). The internal diameter will vary depending on the wall thickness of the metal. The reason for this is so that the same structural supports can be used for all piping of a specific NPS number regardless of the wall thickness.


Steel pipe schedules are a way to describe the wall thickness of the pipe. This is a critical parameter as it is directly related to the strength of the pipe and the suitability for specific applications. A pipe schedule is a dimensionless number and is calculated based on the design formula for wall thickness, given the design pressure and allowable stress.

Examples of schedule numbers are as follows: 5, 5S, 10, 20, 30, 40, 50, 60, 80, 100, 120, 140, 160, STD, XS, and XXS—with the most common being schedules 40 and 80. As the schedule number increases, the wall thickness of the pipe increases. The schedule number of a pipe therefore defines the internal diameter, as the OD is fixed by the NPS number.

Over 1000 Tons in Stock for Stainless Steel Fasteners!

ISMT & Jindal Steel Pipes Dealers, Original MTR's Provided with All Materials

As one of the biggest stainless steel fastener stockholder and supplier in India, Metallica carries inventory of over 10,000 tons in its warehouses in Mumbai, Maharashtra India. We sell our stainless steel fasteners throughout India, and to international clients. We can supply our stainless steel fasteners not only in industry-standard lengths and diameters, but also in custom length and diameters.

How are Steel Pipes Certified?

Certification of Steel Pipes

Manufacturers issue a Material Test Report or Mill Test Report to validate that the product meets the chemical analysis and mechanical properties specification. The MTR will contain all relevant data to the product and will accompany the product through its lifecycle.

The following are typical parameters that may be recorded on an MTR:

  • Chemical composition including carbon content, alloys, and sulfur
  • Material size, weight, identification, and grade
  • Material heat number, which ties back to the processing batch
  • Mechanical properties like tensile strength, yield strength, and elongation

At Metallica, we will Provide you with Original MTR’s for all Stainless Steel Pipe Products! We will Send Our Test Certificates, along with Quotation