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S355 Steel Washers

S355 Steel Washers
s355 steel washers

Precision-Engineered S355 Steel Washers from Stephens Gaskets
Call 0121 544 5808 Today

Bespoke Manufacturing

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Instant Quote Service

Worldwide Delivery

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Various Gauges/Thicknesses

Bespoke Manufacturing

l

Instant Quote Service

Worldwide Delivery

R

Various Gauges/Thicknesses

At Stephens Gaskets, we specialise in supplying structural-grade S355 steel washers for high-load and safety-critical applications. With over 70 years of experience in engineering excellence, we are a trusted UK-based S355 steel washers manufacturer.
Our washers are built for performance, available in custom sizes, and delivered fast to meet the demands of industry.
Whether you’re designing structural steelwork or specifying components for heavy machinery, our S355 steel washers deliver the strength, reliability, and support your project needs.

What Are S355 Steel Washers?

S355 Steel Washers are flat, disc-shaped components made from high-strength S355 structural steel. They’re designed to distribute the load of a fastener, such as a bolt or nut, over a wider area. This reduces surface wear, prevents deformation, and ensures a stable, long-lasting connection.

These washers are chosen when the strength of mild steel is not enough. With a yield strength of 355 MPa, S355 steel washers offer superior load-bearing capability for critical joints.

Material Overview: What Is S355 Steel?

S355 is a non-alloy structural steel defined under EN 10025-2 standards. It is widely used across engineering and construction because of its strength, toughness, and ease of fabrication.

Key properties include:

  • Minimum yield strength of 355 MPa.
  • High tensile strength for structural durability.
  • Excellent machinability and weldability.
  • Suitable for both static and dynamic loads.
  • Available in subgrades like S355JR, S355J2, S355MC, and S355ML.
This makes it an excellent base material for washers used in both standard and specialist applications.

Why Choose Stephens Gaskets?

Stephens Gaskets is a leading S355 steel washers company serving UK and international clients. We offer:

  • In-house manufacturing with full traceability.
  • Certified S355 steel compliant with EN 10025-2.
  • Customisable sizing, coatings, and subgrades.
  • Quick lead times and competitive pricing.
  • Expert guidance and technical support.
From infrastructure contractors to OEM engineers, our clients rely on us for dependable parts, consistent quality, and tailored service.

Benefits of S355 Steel Washers

1. High Strength and Load Capacity

With a minimum yield strength of 355 MPa, these washers are ideal for demanding fastening applications. They resist deformation and maintain integrity under pressure.

2. Excellent Load Distribution

S355 steel washers prevent bolt pull-through and protect surfaces. This improves the lifespan of fasteners and the structures they support.

3. Versatility Across Industries

Used in construction, machinery, rail, marine, automotive, energy, and agriculture. These washers are suited for dynamic and static load environments.

4. Surface Treatment Options

They can be galvanised, zinc-plated, powder-coated, or epoxy-treated for improved corrosion resistance. This ensures performance in outdoor or marine conditions.

5. Custom Manufacturing Available

Choose the exact thickness, diameter, or finish your project demands. We work to drawings, specs, and British Standards.

6. Long-Term Value

Compared to alloy or stainless washers, S355 offers high performance at a lower cost – with reduced need for replacement or maintenance.

Common Applications of S355 Steel Washers

S355 steel washers are used where reliability and strength are essential. Their most common uses include:

1. Construction and Infrastructure
Used in bolted joints for bridges, structural frames, and steel supports. S355 washers protect against bolt loosening and load-induced wear.
2. Heavy Machinery
Ideal for cranes, earthmovers, and processing machines. They reduce vibration and shear stress at high-impact junctions.
3. Automotive and Commercial Vehicles
Used in trailer chassis, suspension systems, and mounting brackets where load-bearing fasteners are essential.
4. Rail and Transport Systems
Installed in rail tracks, sleeper connections, and rolling stock to absorb movement and resist fatigue.
5. Marine and Offshore Engineering
Applied in offshore rigs, ship hulls, and dockside infrastructure with protective coatings to resist corrosion.
6. Wind Energy and Renewables
Used in turbine towers and anchor systems to ensure structural integrity under environmental stress.
7. Agricultural Equipment
Mounted in silos, conveyors, and farm machinery to support heavy use and harsh conditions.

Industry-Specific Material Selection

At Stephens Gaskets, we tailor each washer to meet the specific requirements of your sector:

Industry Preferred S355 Grade Recommended Treatment
Construction S355J2, S355JR Hot-dip galvanising, zinc plating
Heavy Machinery S355J2+N Phosphate coating, heat treatment
Automotive S355MC Electroplating, anti-corrosion
Rail and Transport S355K2, S355J2+AR Galvanising, outdoor paint systems
Marine & Offshore S355 + Coatings Epoxy, hot-dip galvanising
Wind Energy S355ML C5 corrosion protection coatings
We help you select the right subgrade and finish for your application – so your washers perform exactly as needed.

Avoid Common Pitfalls When Buying S355 Steel Washers

  • Inconsistent Quality
    Some washers labelled “S355” don’t meet industry standards. We provide EN 10204 3.1 certification and full traceability.
  • Limited Availability of Custom Sizes
    Many suppliers only stock standard dimensions. We manufacture to any spec with short lead times.
  • Corrosion Issues
    Untreated S355 can rust outdoors. We supply pre-treated or coated washers for marine, industrial, or weather-exposed use.
  • Overengineering Costs
    Clients sometimes overspend on stainless steel when S355 is more appropriate. Our engineers can help you spec correctly.
  • Slow Lead Times from Overseas
    As a UK-based manufacturer, we offer faster delivery and responsive support for urgent or ongoing contracts.
  • Lack of Technical Guidance
    We offer expert advice, detailed datasheets, and a consultative approach – helping you buy with confidence.

FAQs

What are S355 steel washers?
They’re high-strength washers made from S355 steel. Used to spread load and prevent surface damage in structural connections.
Why choose S355 over mild steel?
S355 is stronger and more durable. It resists deformation and is better suited for heavy-duty or safety-critical applications.
What industries use them?
Construction, automotive, rail, marine, renewables, and heavy machinery sectors.
What S355 subgrades are available?
S355JR, S355J2, S355MC, S355ML – each offering different toughness, impact resistance, or formability.
Can I order custom sizes or coatings?
Yes. We offer washers in any thickness, bore, or outer diameter with optional galvanising, zinc, or epoxy coatings.
Are they rust-resistant?
Not without treatment. We offer multiple corrosion-resistant options tailored to your environment.
Do you supply certificates?
Yes. All washers come with EN 10204 3.1 mill certificates and full material traceability.
What makes Stephens Gaskets different?
We combine decades of experience, precision UK manufacturing, and responsive service. Quality is consistent, and delivery is reliable.
Can I speak to someone about technical specs?
Yes. Our engineering team can help you select the right washer and material for your application.
Do you support large contracts?
Yes. We serve major projects and OEMs across the UK with consistent quality and supply guarantees.

A Trusted S355 Steel Washers Manufacturer

At Stephens Gaskets, we’ve built our reputation on consistency, quality, and speed. We understand the pressures of structural engineering and high-stakes manufacturing. That’s why every washer we produce meets rigorous standards – and why engineers, project managers, and buyers come back to us.
From single-item prototypes to high-volume production, we deliver S355 steel washers that meet your spec and exceed your expectations.

 

Speak to Our Technical Team Today

Whether you need a quick quote or a detailed technical consultation, Stephens Gaskets is ready to help. As your dedicated S355 steel washers supplier, we’re committed to supplying reliable, certified components fast.

Contact Us
Call: 0121 544 5808 | Email: sales@stephensgaskets.co.uk
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