Precision-Engineered Super Duplex Socket Studbolts
UK Manufacturer – ISO 9001-certified – UK and EU-sourced materials – Full traceability
Super Duplex Socket Studbolts
We are a premier UK manufacturer of Super Duplex Studbolts, expertly crafted at our state-of-the-art Sheffield facility. Renowned for precision engineering, our studbolts leverage the exceptional qualities of Super Duplex, offering unparalleled strength and superior resistance to harsh corrosive environments.
Every Super Duplex Studbolt is manufactured to order, utilising high-grade materials sourced exclusively from approved UK and EU suppliers. Our ISO 9001-certified quality management system guarantees comprehensive traceability and unwavering consistency across every production batch, ensuring reliable performance in critical applications.
These robust fasteners are ideally suited for demanding industries such as subsea, offshore, oil & gas, and chemical processing, where extreme conditions necessitate components with outstanding durability and performance.
Why Choose Super Duplex Studbolts?
Super duplex stainless steels combine the benefits of austenitic and ferritic structures, offering:
- Exceptional defence against stress-induced corrosion
- High tensile and yield strength for secure load-bearing
- Superior resistance to pitting and crevice corrosion
- Outstanding longevity in aggressive operational settings
These properties make super duplex studbolts an ideal choice for environments where reliability, longevity and safety are paramount.
Manufactured to Your Specification
Every fastener we produce is made to customer-specific drawings, standards, and tolerances. Our in-house machining and inspection facilities allow us to deliver:
- Metric and imperial sizes
- Thread forms including UNC, UNF, and metric coarse/fine
- Bespoke lengths and head configurations
- Optional coatings, passivation, and testing documentation
We work closely with engineers and procurement teams to ensure that every order meets the exact performance requirements of its intended application.
We work in a huge range of materials, our most common Super Dupex grades are:
Super Duplex UNS S32550
Super Duplex UNS S32750
Super Duplex UNS S32760
ISO 9001-certified processes
Our rigorous quality management system ensures that every Super Duplex Studbolts we produce meets the highest standards of quality and consistency.
UK and EU-sourced materials
We source our Super Duplex materials locally to guarantee safety, compliance, reliability, and sustainability.
Exotic alloy expertise
The Super Duplex we use is designed to withstand the most challenging environments, such as seawater corrosion, chemical applications and extreme pressures.
Full traceability
Our manufacturing processes include comprehensive documentation, ensuring every component is traceable from raw material to finished product.
Applications of Super Duplex Socket Studbolts
Studbolts manufactured by West Special Fasteners are trusted across a variety of industries:
Trusted by defence primes for non-weapon applications. Designed for strength and durability, our fasteners are critical in assembly and maintenance.
Used for nuclear critical infrastructure applications. Engineered for extreme reliability, our fasteners support the safety and longevity of power systems.
Using exotic metals designed for harsh offshore and marine environments, our fasteners deliver proven strength and corrosion resistance.
Our fasteners ensure structural integrity and long-term performance in bridges, tunnels, and critical frameworks.
Precision-manufactured for corrosive and high-temperature conditions, offering reliable performance in chemical applications.
Offering durability in extreme environments, our fasteners support wind, solar, and tidal energy projects.
Super Duplex Information, Composition & Properties
Super Duplex stainless steels are high-performance alloys characterised by a dual-phase microstructure consisting of approximately equal proportions of austenite and ferrite. This balanced structure allows Super Duplex studbolts to provide the combined benefits of austenitic and ferritic steels, resulting in a material that offers twice the yield strength of standard 300-series stainless steels while maintaining excellent ductility and toughness. These studbolts are engineered specifically for high-stress applications where structural integrity cannot be compromised.
The superior performance of Super Duplex is derived from its highly alloyed chemical composition, typically containing 24-28% chromium, 6-8% nickel, and 3-5% molybdenum, along with significant additions of nitrogen. This combination results in a Pitting Resistance Equivalent Number (PREN) exceeding 40, ensuring outstanding resistance to localised corrosion, including pitting and crevice attack. Furthermore, the alloy’s specialised composition provides exceptional defence against chloride-induced stress corrosion cracking and erosion, making Super Duplex studbolts indispensable for critical fastening in marine, subsea, and aggressive chemical processing environments.”
At West Special Fasteners, we take pride in every Super Duplex Studbolts we produce, no matter the application.
Certified Quality and Traceability
West Special Fasteners operates a fully accredited ISO 9001 quality system with comprehensive documentation and batch traceability. All material certificates and inspection reports are supplied as standard, ensuring complete confidence in the origin and integrity of every component.
About West Special Fasteners
Based in Sheffield, West Special Fasteners has been manufacturing precision-engineered fasteners since 1999. We specialise in super duplex, duplex, stainless steel, titanium, and nickel alloy components, serving clients across the UK and overseas.
Our commitment to quality, reliability, and service has made us a trusted partner to major industries worldwide.
Super Duplex Studbolt Manufacturing Capabilities
Our Sheffield-based manufacturing facility specialises in the production of high-integrity Super Duplex studbolts, utilising advanced hot forging and precision machining techniques to meet the most demanding industrial standards. As one of the few UK manufacturers with dedicated hot press forging capabilities, we ensure the material integrity of every studbolt is preserved for high-stress applications. Our hybrid workshop combines CNC and manual technology, allowing us to produce studbolts in a comprehensive range from M3 to M100 (metric) and 3/16″ to 4″ (imperial), with lengths up to 500mm tailored to bespoke project requirements.
To ensure superior performance in safety-critical environments, we utilise cold-form thread rolling for diameters up to M72, which enhances tensile strength and fatigue resistance by displacing material rather than cutting it. Every production run is supported by rigorous quality assurance, including in-house PMI testing, hardness testing, and API-approved heat treatment processes such as solution annealing and stress relieving. From specialised coatings like PTFE and Xylan to full NDT certification and material traceability, our manufacturing capabilities are designed to meet the non-negotiable standards of the subsea, offshore, and chemical processing industries.
99% on-time delivery
At West Special Fasteners, we deliver precision-engineered fasteners with a proven 99% on-time delivery record, ensuring your projects stay on schedule. With lead times as short as 4 weeks for full-service orders, we provide unmatched reliability for industries where timing is critical.
- Minimise delays – Receive your special fasteners exactly when needed, helping you avoid costly project interruptions.
- Support critical operations – Our dependable delivery is essential for sectors like defence, offshore, and renewables, where timing is non-negotiable.
- Boost project efficiency – Reliable deliveries streamline your workflow, allowing you to focus on execution without supply chain concerns.
- Maintain your reputation – Trust in our punctuality to ensure your commitments to your clients are met, every time.
- Transparent communication – Realistic timelines and proactive updates at every stage.
- Efficient production – Our advanced facilities and streamlined processes enable us to deliver on time, even for complex and bespoke projects.
Our ability to always deliver on time sets us apart in the fastener industry. While with many competitors you can face frequent delays, we ensure your orders are delivered with precision and professionalism – backed by our fully traceable production process and industry-leading expertise.
Hex Bolts
A Unique Architectural Achievement
West Special Fasteners Ltd’s A4-80 Hexagon Bolts play a crucial role in securing the complex and visually stunning Helix Bridge in Singapore’s Marina Bay.
CONTACT US
Speak to an expert
Whether you have a question, want to explore collaboration possibilities, or require expert advice, we are here to assist you.
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Location
Callywhite Ln, Dronfield, S18 2XR
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