SS 304 Fasteners Manufacturer, Supplier & Exporter

Industrial ASTM A193 B8 grade SS 304 stainless steel bolts, nuts, and washers ready for dispatch from stock

Technical Product Details

Material Grade	Austenitic Stainless Steel 304 (UNS S30400 / SS 304L / SS 304H)
Governing Specifications	ASTM A193 / A194 / A320, ASME B18.2.1, ASME B18.2.2, ASME B18.21.1, DIN 931 / 933 / 934 / 125 / 127
Supply Configurations	Cold Forged Fasteners, Hot Forged Fasteners, CNC Machined Threaded Components, Precision Stamped Washers
Dimensional Scope	Size Range: M2 to M100 (1/8" to 4") \| Length: Up to 1500 mm / Custom Cut Lengths
In-House Quality Verification	PMI Chemical Analysis, Vernier Caliper & Micrometer Dimensional Checks, Ultrasonic Testing (UT) per ASTM A388, EN 10204 3.1 Certification

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Table of Contents

SS 304 Fasteners Overview
Technical Specifications
Types of SS 304 Fasteners Available
SS 304 Chemical Composition & Mechanical Properties
Key Advantages of SS 304 Fasteners
Key Industrial Applications
Torque Values & Load-Bearing Performance Parameters
Global Supply & Export Network
Quality Assurance & Inspection
Frequently Asked Questions
Request a Quote for SS 304 Fasteners

SS 304 Fasteners Overview

Nirvaan Overseas is a premier SS 304 Fasteners Manufacturer in India, precision-forging high-tensile 18/8 stainless steel bolts, nuts, studs, and washers. Grade 304 delivers exceptional atmospheric corrosion resistance and structural strength for heavy industrial assemblies.

Every batch undergoes 100% PMI testing, dimensional checks, and proof load verification to guarantee zero-defect thread engagement and joint clamping security. All shipments include EN 10204 3.1 Material Test Certificates (MTC) and TPI reports.

Operating as an established SS 304 Fasteners Exporter, we regularly ship certified fastener packages to major industrial hubs across Saudi Arabia, UAE, Qatar, Oman, Kuwait, Germany, Italy, Poland, Singapore, Malaysia, Vietnam, Indonesia, and the United States.

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Technical Specifications

Parameter	Technical Details
Standards	ASTM A193 Grade B8, ASTM A194 Grade 8, ASME B18.2.1, ASME B18.2.2, ASME B18.21.1, DIN 931 / 933 / 934 / 125 / 127
Material Grades	Stainless Steel 304 (UNS S30400), 304L (UNS S30403), 304H (UNS S30409)
Product Scope	Nuts & Bolts: Heavy Hex Bolts, Stud Bolts, Hex Nuts, Lock Nuts, Socket Cap Screws Washers: Flat Plain Washers, Spring Lock Washers, Belleville Washers
Size Range	M2 to M100 (1/8" to 4" Diameter) \| Length: Up to 1500 mm / Custom Cut Lengths
Thread Profiles	METRIC, BSW, BSF, UNC, UNF, UNEF, NPT, ACME Threading
Coatings & Finish	Passivated, Teflon (PTFE) Coated, Bright Zinc Plated (BZP), Hot Dip Galvanized (HDG), Cadmium

Stainless Steel 304 bolts, nuts and washers stored as industrial fastener stock for fabrication requirements

Types of SS 304 Fasteners Available

SS 304 Nuts & Bolts: Cold-forged heavy hex bolts, stud rods, and lock nuts to ASME B18.2.1/DIN 931. Browse our SS 304 Nuts & Bolts range for high-tensile piping flanges and machinery.
SS 304 Washers: Precision-stamped flat, spring lock, and Belleville load washers (DIN 125/127). Browse our complete SS 304 Washers inventory designed for uniform load distribution and vibration resistance.
SS 304 Hex Bolts & Heavy Hex Bolts: Precision cold-forged fasteners for structural machinery, heavy industrial equipment, and piping flanges.
SS 304 Stud Bolts & Threaded Rods: Full-thread and double-end studs engineered for secure pressure vessel and flange bolting.
SS 304 Hex Nuts & Lock Nuts: Precision-threaded mating nuts (ASME B18.2.2 / DIN 934) built to withstand dynamic load stress and thread stripping.
SS 304 Flat Washers (DIN 125): Stamped distribution washers engineered to protect surface finishes and evenly spread bolt tension.
SS 304 Spring Lock Washers (DIN 127): Helical spring washers designed to prevent bolt loosening under dynamic structural vibration.

SS 304 Chemical Composition & Mechanical Properties

Equivalent Grades Standard Table

Standard Designation	Specification Detail
UNS Designation	UNS S30400
Werkstoff Nr.	1.4301
EN Standard	X5CrNi18-10
JIS (Japan)	SUS304
Bolt / Stud Standard	ASTM A193 Grade B8 Class 1 / Class 2
Nut Standard	ASTM A194 Grade 8

Chemical Composition (%)

Element	SS 304 Fastener	SS 304L Fastener	SS 304H Fastener
Carbon (C)	0.08 max	0.030 max	0.04 – 0.10
Manganese (Mn)	2.00 max	2.00 max	2.00 max
Silicon (Si)	0.75 max	0.75 max	0.75 max
Phosphorus (P)	0.045 max	0.045 max	0.045 max
Sulfur (S)	0.030 max	0.030 max	0.030 max
Chromium (Cr)	18.0 – 20.0	18.0 – 20.0	18.0 – 20.0
Nickel (Ni)	8.0 – 10.5	8.0 – 12.0	8.0 – 10.5
Nitrogen (N)	0.10 max	0.10 max	—

Mechanical Properties

Mechanical Property	SS 304 Fastener	SS 304L Fastener	SS 304H Fastener
Tensile Strength (MPa) Min	515	485	515
Yield Strength (0.2% Offset, MPa) Min	205	170	205
Elongation (%) Min	40	40	40
Hardness (HB) Max	201	201	201
Hardness (HRB) Max	92	92	92

Key Advantages of SS 304 Fasteners

Atmospheric & Organic Acid Resistance: 18% chromium content forms an instant passive oxide layer that prevents surface oxidation and rusting in potable water and organic fluid exposure.
Cryogenic Impact Toughness: The non-magnetic austenitic matrix maintains high mechanical notch toughness at temperatures as low as -196°C without brittle failure.
High Clamping Integrity: Precision CNC-machined and roll-threaded surfaces eliminate thread galling and ensure uniform torque-tension behavior.
Smooth Surface Finish & Hygiene: Passivated bright surfaces prevent product accumulation and allow easy cleaning in food and sanitary processing setups.
High Weldability & Fabrication Integrity: Low susceptibility to thermal cracking allows easy inline welding of studs and custom anchors without pre-heat treatment.

Key Industrial Applications

Food, Beverage & Sanitary Processing: Hygienic jointing in dairy machinery, brewery equipment, and CIP fluid lines.
Municipal Water Treatment & Desalination: High-pressure pump mounts, pipe flange connections, and structural frames.
Chemical & Organic Solvent Handling: Structural fasteners for tanks, vessels, and pumps conveying organic acids and solvents.
Power Generation & Utility Infrastructure: Auxiliary equipment assembly, boiler housing frame bolting, and cooling tower structures.
Architecture & Structural Framing: Exterior curtain wall bolting, industrial handrails, and heavy machinery foundations.

SS 304 Fasteners Torque Chart & Specifications

Designed to ASME and DIN standards, our Grade 304 fasteners manage tensile loads, shear stress, and clamping preloads. Below are the recommended tightening torque and proof load capabilities:

Fastener Size	Metric / Inch Grade	Proof Load Stress (MPa)	Tensile Strength Min (MPa)	Recommended Torque (Nm) - Dry
M6 / 1/4"	A2-70 / Class 70	450	700	9.5
M8 / 5/16"	A2-70 / Class 70	450	700	23.0
M10 / 3/8"	A2-70 / Class 70	450	700	46.0
M12 / 1/2"	A2-70 / Class 70	450	700	80.0
M16 / 5/8"	A2-70 / Class 70	450	700	195.0
M20 / 3/4"	A2-70 / Class 70	450	700	380.0

Global Supply & Export Network

Operating as an established SS 304 Fasteners Exporter, we maintain an active supply network to meet international project requirements across key industrial regions:

🇮🇳 India

Mumbai
Pune
Chennai
Faridabad

Middle East

Saudi Arabia
Qatar
Oman
Kuwait

Europe

Germany
Italy
Netherlands
Poland

Asia Pacific

Singapore
Malaysia
Vietnam
Indonesia

🇺🇸 United States

Michigan
Illinois
Texas

Quality Assurance & Inspection

Inspection Stage	Testing & Compliance Standard
Dimensional Verification	Calibrated thread gauge, pitch micrometer, and caliper checks for pitch tolerances and length limits.
Chemical & PMI Testing	100% In-House XRF Spectro testing to verify 18–20% Chromium and 8–10.5% Nickel chemistry.
Mechanical & Hardness Testing	Tensile strength, proof load, wedge testing, and Brinell/Rockwell B hardness testing to match ASTM A193/A194.
Surface Inspection	Optical scanning and dye penetrant testing to guarantee zero thread cracks, burrs, or forging laps.
MTC & Certification	Full EN 10204 3.1 / 3.2 Material Test Certificates with NABL-accredited laboratory reports.
Third-Party Inspection	Pre-dispatch TPI available upon request via SGS, TUV, Bureau Veritas, DNV, or Lloyds.

Frequently Asked Questions

Q: What is the standard bolt equivalent for SS 304 stainless steel?

A: The standard high-temperature and pressure specification equivalent for Grade 304 stainless steel bolts is ASTM A193 Grade B8 (with ASTM A194 Grade 8 nuts).

Q: What is the diameter and size scope for your SS 304 fasteners?

A: As a leading SS 304 Fasteners Manufacturer in India, we supply metric and imperial sizes ranging from M2 up to M100 (1/8" to 4") in lengths up to 1500 mm.

Q: Are Grade 304 fasteners suitable for marine environments?

A: SS 304 performs exceptionally in atmospheric and fresh water conditions; however, for direct submerged marine or high-chloride coastal exposure, we recommend molybdenum-alloyed SS 316 fasteners to prevent pitting corrosion.

Q: What testing standards are applied prior to export?

A: Every fastener batch undergoes 100% PMI testing, proof load testing, thread ring gauge verification, and dimensional checks before dispatch.

Q: Which regions do you export to as an SS 304 Fasteners Exporter?

A: As an active SS 304 Fasteners Exporter, we regularly ship certified fastener packages to Saudi Arabia, UAE, Qatar, Oman, Kuwait, Germany, Italy, Poland, Singapore, Malaysia, Vietnam, Indonesia, and the United States.

Request a Quote for SS 304 Fasteners

Contact Nirvaan Overseas—your trusted SS 304 Fasteners Manufacturer & Exporter in India—for factory-direct pricing, custom manufacturing, EN 10204 3.1 MTCs, and fast global dispatch.

Email: sales@nirvaanoverseas.com

Phone / WhatsApp: +91 77386 88058

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