When using fasteners in critical applications, selecting a suitable material is crucial. That is where stainless steel fasteners come into play, as they provide exceptional mechanical and corrosion resistance properties that make them ideal for harsh environments. Among all stainless steel types, 321 and 321H are two popular choices.

Stainless steel 321 is a titanium-stabilized austenitic alloy known for its high-temperature strength and resistance to intergranular corrosion. Stainless steel 321 fasteners are available in many types, including bolts, nuts, screws, washers, and studs. The fasteners can be designed with different thread types, such as fully threaded, partially threaded, or non-threaded.

Stainless steel 321H is a high-carbon version of 321 designed to offer superior resistance to high temperatures. This alloy is suitable for use in applications that involve exposure to temperatures up to 1500°F (815°C). Stainless steel 321H fasteners are widely used in high-temperature applications, including heat exchangers, chemical processing, and aerospace industries.

321 Stainless Steel Bolts, Stainless Steel 321 Nuts and Bolts, SS 321 Hex Bolt, ASTM A193 Stainless Steel 321 Stud Bolt, SS 321 Threaded Rod, 321 Stainless Steel Fasteners, SS 321 Fasteners Manufacturers In India.

Stainless Steel 321 Fasteners
  • UNS


  • WNR



    ASTM A193 / ASME SA 193


Stainless steel 321 and 321H fasteners are highly versatile and can be used in various applications. They are suitable for use in environments that involve exposure to corrosive gases and liquids, hot working conditions, and high strength requirements. These fasteners are commonly used in cryogenic applications, thermal processing, pressure vessels, and nuclear operations.

Stainless steel 321 and 321H fasteners offer several benefits, making them a preferred choice for different applications. They exhibit excellent mechanical properties, such as high tensile strength, flexibility, and resistance to creep and fatigue failures. Additionally, these fasteners feature exceptional corrosion resistance properties, which protect them from rust and degradation in harsh environments. That makes them suitable for use in corrosive environments, such as marine, chemical process, and oil and gas industries.

Choosing the suitable fastener material is critical to ensuring a structure or equipment's long-term performance and reliability. Regarding high temperature and corrosive applications, stainless steel 321 and 321H fasteners give superior mechanical and corrosion resistance properties. With its wide availability in different types and sizes, these fasteners can be customized to meet specific needs.

SS 321 Bolts, Stainless Steel 321 Bolts, Stainless Steel 321 Nuts, 321 SS Stud Bolt, SS 321H Washers, Stainless Steel 321H Fasteners, SS 321H Bolts, SS 321H Fasteners Manufacturers in India.

fevicon-logo SS 321 Bolts and Nuts Specification

Specifications ASTM A193 / ASME SA 193
Standard DIN, ISO ,JIS ,GB, IS, BS, ASTM and all International Standards
Size M3 to M90
Length 10mm to 1000mm
Dimensions DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3
Threads available UNF, BSW, BSF, METRIC, UNC, or as required
Threads Configuration ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads
Form Hex, Threading, Square, Round as per Gauge Etc.
Head Hex, Square, Round, Hex flange, Flat, T-head & Triangular etc.
Neck type Hex, Square, Triangular, Oval & Knurled etc.
Surface Coating Black Oxide, Cadmium, Galvanized, Teflon, Xylan, Zinc, Others Upon Request
Manufacturing Process Wire Drawing, Cold Heading, Insert tapping, Heat Treatment, Surface Plating, Inspection, Packing.

Stainless steel 321 and 321H fasteners are widely used in many applications that require high durability, strength, and corrosion resistance. These materials offer a range of advantages that make them ideal for various industries, including construction, food processing, and chemical processing.

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fevicon-logo Equivalent Grades Of Stainless Steel 321 Fasteners

SS 321 1.4541 S32100 SUS 321 X6CrNiTi18-10

fevicon-logo Chemical Composition of Stainless Steel 321 Fasteners

Grade C Mn Si P S Cr N Ni T
SS 321 0.08 max 2.0 max 1.0 max 0.045 max. 0.030 max 17.00 - 19.00 0.10 max 9.00 - 12.00 5(C+N) – 0.70 max

fevicon-logo Mechanical Properties of SS 321 Fasteners

Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
8.0 g/cm3 1457 °C (2650 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %

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fevicon-logo Types of Stainless Steel 321 Fasteners


SS 3 Nuts


SS 321H Bolt


SS 321 Washer

Stud Bolts

SS 321 Stud Bolts

Hex Bolt

321 SS Hex Bolt

Threaded Rod

321 SS Threaded Rod

Anchor Bolt

SS 321 Anchor Bolt

Spring Washer

SS 321H Spring Washer

Fasteners Manufacturers In India

  • Hardness testing to ISO 6508-1

  • Nut proof load testing to ISO 898-2

  • Suitability for preloading to EN 14399-2

  • Calibrated gauges and tools

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SS 321 Fasteners Suppliers in India SS 321 Fasteners Manufacturer in India
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fevicon-logo Stainless Steel 321 Fastener Application Industries

Aerospace Industry
Nuclear Industry
MEdical Industry
Marine Industry
Mining Industry
Automotive Industry
Construction Industry
Manufacturing Industry
Nut Bolt