M30 SS202 Plain Washers – Best Stainless Steel Flat Washers for Industrial Use

Introduction

In the ever-evolving world of industrial components, M30 SS202 Plain Washers have emerged as a critical element across various sectors due to their versatility, strength, and reliability. At Nafees Metal Industries, based in Mumbai, we specialize in manufacturing and supplying a wide range of stainless steel washers designed to meet the diverse requirements of modern engineering and industrial setups.

M30 SS202 Plain Washers are flat, circular discs with a central hole designed to distribute the load of a threaded fastener. Whether used in heavy machinery, automotive assemblies, or high-pressure systems, these washers help prevent surface damage and enhance joint integrity. The SS202 grade stainless steel offers a cost-effective yet strong alternative to other grades like SS304, making it ideal for many industrial applications that do not require high corrosion resistance but still need dependable mechanical strength.

This comprehensive guide walks you through the key features, detailed applications, technical advantages, and real-world usage of M30 SS202 Plain Washers while also answering the most frequently asked questions to help you make an informed decision for your projects.

Product Overview

The M30 SS202 Plain Washers are designed for bolts with M30 thread sizes and are typically used with nuts or bolts to ensure even pressure distribution. Manufactured using SS202 stainless steel, they offer excellent mechanical strength, moderate corrosion resistance, and cost efficiency—making them a practical choice for large-scale industries.

Key Technical Specifications:

• Material: SS202 Stainless Steel

• Outer Diameter: ~56-60 mm

• Inner Diameter: 30 mm (to fit M30 bolts)

• Thickness: 3.0 mm – 5.0 mm (as per DIN standards)

• Finish: Bright, Pickled, or Polished

• Tolerance: As per DIN 125, ISO 7089, or customized standards

These washers are manufactured using cold stamping or CNC machining, followed by finishing treatments that ensure durability and precision fitment. As one of the leading washer manufacturers in Mumbai, we ensure consistent quality across every batch.

Key Features of M30 SS202 Plain Washers

1. High Mechanical Strength
   The SS202 stainless steel composition makes these washers ideal for applications where moderate tensile strength and wear resistance are essential. They can withstand high bolt torques without deforming.

2. Economic Alternative to SS304
   SS202 offers nearly comparable mechanical properties to SS304 but at a significantly lower cost. This makes M30 SS202 Plain Washers highly preferred in cost-sensitive industrial environments.

3. Corrosion Resistance in Non-Marine Environments
   While SS202 is not as corrosion-resistant as SS316 or SS304, it performs well in indoor, dry, and mildly humid conditions—ideal for general machinery, infrastructure, and automotive use.

4. Uniform Load Distribution
   These washers distribute the load over a larger surface area, reducing the chance of bolt or nut pull-through, surface damage, and localized stress on materials.

5. Compatibility with a Wide Range of Materials
   The neutral electrochemical behavior of SS202 makes these washers suitable for use with mild steel, aluminum, cast iron, and other structural materials.

6. Customized Thickness and Diameter Options
   We provide tailored manufacturing for clients who need specific thicknesses or outer diameters to suit their machinery or structural requirements.

7. Low Maintenance
   Once installed, M30 SS202 Plain Washers do not require frequent replacement or inspection, adding value to long-term maintenance planning.

8. Excellent Surface Finish
   Our polishing and surface treatment options improve both appearance and corrosion resistance, particularly in automotive and structural use cases.

9. Made in Mumbai, Trusted Worldwide
   With our factory based in Mumbai, we ensure quick delivery timelines, responsive customer service, and superior quality control.

Applications of M30 SS202 Plain Washers

M30 SS202 Plain Washers are widely used across a diverse array of industrial applications. Their adaptability and performance make them indispensable in scenarios that demand high mechanical reliability.

1. Infrastructure and Construction
   These washers are used in structural steel assemblies such as girders, columns, and base plates. They ensure load-bearing capacity without stressing or damaging structural elements.

2. Automotive and Heavy Vehicles
   Frequently employed in engine mounts, suspension systems, chassis frames, and exhaust manifolds, M30 SS202 Plain Washers help secure large bolts and prevent damage from vibration.

3. Machinery and Equipment Manufacturing
   From large presses to conveyor belts, these washers are used wherever M30 bolts are part of the fastening system—ensuring longevity and precision.

4. Railways and Metro Infrastructure
   Used in fastening large panels, beams, and joints, they deliver reliable performance under heavy loads and frequent dynamic stresses.

5. Elevators and Escalators
   High-rise commercial complexes use these washers in mechanical lifts and escalator assemblies, ensuring smooth operation and safety.

6. Industrial HVAC and Ducting Systems
   M30 SS202 Plain Washers ensure leak-proof, secure bolt tightening in ducting systems and large ventilation units.

7. Textile and Packaging Machines
   High-speed machines in textile units and packaging plants rely on these washers to maintain consistent pressure on fasteners.

8. Cranes and Lifting Equipment
   Washers ensure secure bolting in cranes, hoists, and lifting platforms, distributing stress and minimizing wear on anchoring points.

9. Wind and Solar Energy Structures
   Renewable energy infrastructure often uses stainless steel components to withstand environmental conditions; SS202 is ideal for moderately demanding outdoor use.

Use Cases in Real-World Applications of M30 SS202 Plain Washers

At Nafees Metal Industries, we manufacture M30 SS202 Plain Washers to serve demanding industrial environments where strength, durability, and corrosion resistance are non-negotiable. As a leading washer manufacturer from Mumbai, we supply these heavy-duty Stainless Steel Flat Washers to a variety of industries and real-world applications that require performance under high-load, high-vibration, and corrosive conditions.

Below are some of the most impactful and high-utility use cases for our M30 SS202 Plain Washers:

1. Structural Steel & Heavy Engineering

In large-scale structural steel projects, including commercial buildings, bridges, and stadiums, M30 SS202 Plain Washers are used in conjunction with M30 bolts to:

• Distribute heavy loads across a wider surface area.

• Prevent indentation and surface damage to steel beams and plates.

• Maintain bolt preload under thermal expansion and mechanical vibration.

• Improve long-term structural stability by resisting washer deformation under stress.

Use Case Example: In metro station construction, M30 washers are frequently used in base plate and column anchoring systems.

2. Heavy Machinery Assembly

Industrial machines such as crushers, turbines, boilers, hydraulic presses, and power press machines require highly durable washers that can maintain joint integrity even under intense torque and vibration.

• The SS202 grade ensures protection against wear and corrosion due to oil, grease, and dust exposure.

• Their robustness helps secure nuts and bolts in rotating machinery and dynamic load applications.

Use Case Example: In cement plants and rolling mills, M30 SS202 Plain Washers are fitted under anchor bolts of massive rotary equipment.

3. Wind Energy & Renewable Infrastructure

Wind turbines involve large M30 bolts at the tower flanges and base plates, where flat washers are crucial to:

• Withstand constant mechanical load from rotor vibrations.

• Prevent stress concentration on the steel frame due to fluctuating wind forces.

• Offer long-term resistance to corrosion, especially in offshore and coastal areas.

Use Case Example: Renewable energy contractors use Stainless Steel Flat Washers in wind turbine tower installations and solar panel mounting structures.

4. Oil & Gas Pipelines

Pipeline systems and refineries often employ M30-size fasteners to join flanges, supports, and anchor blocks. In such cases:

• SS202 plain washers act as a buffer to resist high-pressure flow vibration.

• Their chemical-resistant property makes them suitable for contact with petroleum derivatives.

• They reduce the risk of galling and bolt thread damage during installation and servicing.

Use Case Example: Midstream pipeline maintenance teams use M30 SS202 Plain Washers during periodic flange replacements and pressure valve installations.

5. Railway and Metro Infrastructure

In rail track assembly and metro tunnel works, M30 bolts are used extensively. Our SS202 Plain Washers help in:

• Distributing mechanical stress on track support plates.

• Reducing wear from thermal expansion and vibration caused by high-speed train movements.

• Ensuring long-term maintenance-free performance under extreme outdoor exposure.

Use Case Example: Metro rail contractors across India use Best M30 SS202 Plain Washers manufactured by us for anchor bolt assemblies and girder connections.

6. Shipbuilding & Marine Equipment

Marine environments pose severe challenges due to high salinity and humidity. Our SS202 Washers provide:

• High corrosion resistance suitable for above-water marine components.

• Strength to withstand dynamic wave loading on steel structures.

• Reduced maintenance costs in ship deck fittings and coastal construction hardware.

Use Case Example: Shipyards rely on M30 SS202 Plain Washers to install heavy anchor support systems and cargo tie-down plates on freighters and patrol vessels.

7. Power Plants & Transmission Projects

In thermal and hydropower plants, robust fastener assemblies are crucial to manage structural vibration and dynamic forces:

• These plain washers act as flat cushions to secure large electrical components, transformer units, and generator anchor points.

• Help maintain mechanical integrity of bolted joints even under high operating temperatures.

Use Case Example: Power transmission companies use Buy M30 SS202 Plain Washers in Bulk for bolting substation frames and turbine support beams.

8. Automobile and Heavy Vehicle Industries

Although generally used in smaller sizes for automobiles, M30 washers have applications in heavy vehicle chassis, commercial trailers, and off-road machinery where high-load bolts are used.

• They prevent distortion of softer mounting surfaces.

• Maintain joint alignment over long operation cycles.

Use Case Example: Trailer manufacturers use M30 SS202 Plain Washers to reinforce axle and suspension joint fasteners.

9. Cranes and Lifting Equipment

Cranes, hoists, and rigging structures rely on M30 bolts to secure arms and pivots. Our washers offer:

• Load spreading to protect structural connections.

• Resistance to shock and fatigue due to lifting and dropping motion.

Use Case Example: Construction equipment manufacturers install SS202 Washers in crane joints to reduce bolt loosening under jerks.

10. Prefabricated Modular Construction

In modular buildings and pre-engineered warehouses, M30 bolts and washers are used for:

• Connecting steel frames, trusses, and rooftop structures.

• Ensuring quick installation with minimal on-site welding.

• Providing corrosion resistance in outdoor and semi-exposed modules.

Use Case Example: Modular factory units in industrial parks often use M30 SS202 Plain Washers for beam-to-beam connections and slab anchors.

Real-World Case Study: Industrial Application of M30 SS202 Plain Washers

In one of our recent large-scale projects involving a leading infrastructure company in India, M30 SS202 Plain Washers played a critical role in ensuring structural integrity and longevity of connections across heavy-duty steel framework installations. The company was commissioned to develop an expansive commercial facility consisting of interconnected prefabricated steel structures, where each connection point required a reliable solution to withstand high mechanical stress, thermal variation, and environmental exposure.

Problem Statement

The engineering team faced challenges with traditional washers during initial construction mock-ups. The existing fastener assemblies were suffering from early loosening due to vibration, corrosion at joint areas, and surface wear from torque-related stresses. The failure to maintain bolt preload led to increased maintenance downtime and elevated risk of structural compromise. The project required a washer solution that could:

• Withstand high tensile loads and torque pressures.

• Offer resistance against corrosion in humid and semi-coastal environments.

• Prevent bolt head indentation and protect structural components.

• Deliver consistent performance over extended operational lifespans.

Selection Criteria & Solution

After a technical evaluation and multiple on-site consultations, the decision-makers opted for M30 SS202 Plain Washers manufactured at our Mumbai-based facility. The reason for choosing this product was grounded in the following key properties:

• The SS202 material provided excellent corrosion resistance suitable for semi-coastal climate conditions.

• The M30 size ensured the required load distribution across high-torque bolt joints used in the construction.

• Our precision manufacturing ensured tight dimensional tolerances and surface finish which further helped prevent galling and uneven load transfer.

• The Stainless Steel Flat Washers were compliant with IS, ASTM, and DIN standards, ensuring compatibility with the rest of the project’s fastener specifications.

Execution

Over 12,000 units of M30 SS202 Plain Washers were supplied in multiple batches as per the project’s phased timeline. To ensure supply chain efficiency and quality consistency, our team implemented the following measures:

• Each batch was individually tested for tensile strength and dimensional accuracy.

• Surface finish was inspected using precision gauges to ensure burr-free, mirror-polished edges that reduce friction.

• Packaging was optimized for moisture protection and ease of on-site handling.

The washers were installed across structural columns, base plates, and truss connections where large bolts required equal stress distribution and durability. Technicians were given guidelines for optimal torque tightening, ensuring the washers functioned as designed.

Outcome & Performance Results

Within the first 6 months of post-installation review, engineers reported:

• Zero instances of bolt loosening or joint failure.

• Improved torque retention due to even load distribution by the M30 SS202 Plain Washers.

• Faster assembly time, as the washers were easy to align and seat under bolt heads and nuts.

• Significant reduction in corrosion spots at joint locations, especially compared to previous projects that used mild steel washers.

Overall, the adoption of SS Flat Washers not only improved the structural performance but also helped the company achieve long-term maintenance savings.

Why Choose Nafees Metal Industries for M30 SS202 Plain Washers?

• Mumbai-Based Manufacturing Facility
  Strategically located in Mumbai, we offer fast logistics support across India and the Middle East.

• Customization Capabilities
  We offer OEM support, custom dimensions, and finish types to suit your project.

• Strict Quality Control
  Our washers undergo rigorous dimensional checks, tensile strength tests, and corrosion evaluations before dispatch.

• Bulk Order Fulfillment
  Whether you need 500 or 50,000 washers, we fulfill large-scale orders with consistent quality.

• End-to-End Support
  From inquiry to delivery, our dedicated team provides support, documentation, and certification.

Frequently Asked Questions (FAQs)

Q1: What is the difference between M30 SS202 Plain Washers and MS Flat Washers?
A: M30 SS202 Plain Washers are made from stainless steel (SS202), offering better corrosion resistance and strength compared to mild steel (MS) flat washers.

Q2: Are these washers suitable for marine environments?
A: No. SS202 is not ideal for marine or highly corrosive environments. SS316 would be a better choice in such cases.

Q3: Can I order customized thickness or outer diameter?
A: Yes. We accept custom specifications for both thickness and outer diameter depending on your project requirements.

Q4: Are these washers magnetic?
A: SS202 washers are partially magnetic due to their composition.

Q5: Where can I Buy M30 SS202 Plain Washers in Bulk?
A: You can place a bulk order directly with Nafees Metal Industries, Mumbai. We offer competitive pricing and doorstep delivery.

Q6: Do these washers meet DIN or ISO standards?
A: Yes. All our M30 SS202 Plain Washers comply with DIN 125, ISO 7089, or custom client standards.

Q7: What surface finish is available?
A: We offer plain, polished, bright, and pickled finishes based on your application.

Conclusion

M30 SS202 Plain Washers strike the right balance between durability, strength, and affordability—making them an ideal solution for a wide variety of industrial applications. With excellent load distribution capability and dependable performance, these washers are trusted by professionals across sectors. As a reputed manufacturer based in Mumbai, Nafees Metal Industries ensures top-quality production, competitive pricing, and reliable after-sales support.

If you’re looking to Best M30 SS202 Plain Washers Manufacturer, contact us today for a free quote and sample. We are proud to be recognized among the Best M30 SS202 Washers for Industrial Use, delivering excellence one washer at a time.