ASTM A193 Machine Bolts & SS 304 Fasteners Manufacturer in India
AstroForge Fitting Industries is a leading manufacturer and exporter of ASTM A193 Machine Bolts and Stainless Steel 304 Fasteners in India. Recognized globally by trade names such as Grade 18-8 or UNS S30400, Stainless Steel 304 Fasteners are among the most versatile and widely used alloys in various industries.
The term 18-8 reflects the alloy’s composition — approximately 18% chromium and 8% nickel. The higher chromium content in these UNS S30400 Bolts provides excellent resistance to oxidation and corrosion. Chromium forms a self-healing passive oxide layer on the surface of the SS 304 Bolts and Nuts, making them highly durable and resistant to wear.
These SS 304 Fasteners offer outstanding oxidation resistance when used intermittently at temperatures up to 870°C and continuously up to 925°C, making them ideal for high-temperature applications.
Nickel, present at around 8%, enhances corrosion resistance and stabilizes the austenitic structure of the alloy. In A2 Fasteners, nickel promotes the formation of austenite, which provides superior toughness, impact strength, and tensile strength across both high and low temperatures. Cold working further improves the tensile strength and hardness of SS 304 Nuts and Bolts, although the alloy may become slightly magnetic.
The 304 Stainless Steel Bolts are highly formable, making them suitable for various fabrication and machining processes. At AstroForge Fitting Industries, we manufacture SS 304 Bolts, Nuts, and Washers in compliance with international standards such as ASTM A193, which governs the use of stainless steel fasteners in high-temperature environments. This standard ensures chemical consistency, restricting the addition of unspecified elements.
In addition to their mechanical strength, 304 Stainless Steel Fasteners from AstroForge Fitting Industries demonstrate excellent resistance to atmospheric corrosion and a wide range of chemical and alkaline environments. These fasteners are widely used in the food, beverage, chemical, and pharmaceutical industries due to their ability to withstand moderately oxidizing and reducing conditions.
The high chromium content offers excellent resistance to oxidizing agents such as nitric acid (up to 55% concentration at 176°F). However, in highly reducing environments containing chlorides or sulfuric acid, performance may decline. Despite this, SS 304 Bolts and Nuts remain a preferred choice for numerous applications because they offer:
Excellent corrosion and oxidation resistance
Cost-effectiveness compared to higher alloy grades
Better performance than carbon steel fasteners
Wide availability and ease of fabrication
Depending on the carbon variation, SS 304 Fasteners can be dual-certified as 304L (low carbon) or 304H (high carbon) grades for specific service conditions.
At AstroForge Fitting Industries, we deliver precision-engineered Stainless Steel 304 Fasteners that meet international quality standards, ensuring reliability, durability, and superior performance in every application.
Buy directly from the manufacturer of SS 304 Bolts in India. We offer the largest fixing range of ASME SA193 Type 304 Stud Bolts, Nuts, and Plain Spring Washers for industrial applications.
| Stainless Steel 304 Bolts | ANSI B18.2.1, DIN 931/ 933 |
| A2 Stainless Steel Bolts Size Metric |
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| UNS S30400 Bolts Size Inch |
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| A2 grade 304 Eye Bolts Metric Size |
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| 304 Stainless Steel Nut (DIA) |
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| AISI 304 S30400 Plain Washer (DIA) |
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| Other products |
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| Stainless Steel 304 Bolts and Nuts International Standard | IS, ANSI, ASTM DIN, ISO, JIS, GB, ASME, BS, UNI |
| WNR 1.4301 Bolts Standard Sizes | M10, M4, M16, M36 M2.5, M6, M30, M12, M8, M14, M2, M3, M20, M24, M5 to M160 |
| Stainless Steel 1.4301 Fasteners Threads | BSF, UNF METRIC, UNC, UNEF, BSW or as required |
| ASME/ ANSI – American Standard Stainless Steel 304 Bolts and Nuts |
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| DIN German Standard Stainless Steel 304 Bolts and Nuts | DIN 933, DIN 931, DIN 970, DIN 934 |
| ISO Standard SUS 304 Bolts | ISO 4033, : ISO 4032, JIS standards |
| Stainless Steel S30400 Bolt Head Drive style | Phillips/ Slot, Phillips, Oval, Flat 82 degree, Pan, flat undercut, Round, Truss, flat head 100 degree, binding, fillister head, indented hex head, Slotted, Six-Lobe |
| MTC (Manufacturer Test Certificate) | EN 10204 / 3.1 |
| A193 304 SS Nut Bolt Finishing |
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| Steel grade 304 Fasteners Production Process |
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| Stainless Steel 304 Bolts and Nuts Coating |
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| Stainless 304 Fasteners Packing | Wooden Pallet, Canton, Carton / Small Box or as required |
| Relevant Grades | 304/ 304H/ 304L stainless steel bolts |
| Most selling SS 304 Fasteners |
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Explore moreFAQs - Stainless Steel Stud Bolts & Nuts Set
Stainless Steel Stud Bolts & Nuts Sets are fasteners consisting of threaded rods (stud bolts) and matching nuts, used to assemble flanges, machinery, and piping systems. They provide high strength and corrosion resistance for industrial applications.
They are typically made from SS 304, SS 304L, SS 316, and SS 316L, offering excellent corrosion resistance and mechanical strength suitable for harsh environments.
These fasteners are manufactured according to ASTM A193, ASTM A194, ASME B18.2.1, and DIN/ISO standards, ensuring reliability and compatibility with industrial requirements.
Sizes generally range from M6 to M100 (or ¼” to 4”), with various lengths available as per custom requirements. They are available in different thread types, such as UNC, UNF, and metric.
They are widely used in oil & gas, petrochemical, chemical, power, shipbuilding, and construction industries for assembling high-pressure equipment and pipelines.
High corrosion resistance
Strength to withstand high pressure and temperature
Durable and long-lasting
Suitable for critical industrial applications
SS 316 offers higher corrosion resistance than SS 304, particularly against chlorides and acidic environments, making it suitable for marine and chemical industries.
Yes, if the threads are intact and undamaged, these sets can often be reused, but care must be taken to avoid overtightening and thread wear.
Regular inspection, cleaning, and avoiding exposure to harsh chemicals help prevent corrosion and maintain mechanical integrity. Lubrication during installation also improves longevity.
They provide superior corrosion resistance, mechanical strength, and reliability, making them ideal for critical, high-pressure, and high-temperature industrial applications where safety and durability are essential.