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QC1 fasteners

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QC1 fasteners are classified under a ‘Quality Control Level 1 (QC1)’ standard, representing the highest levels of inspection, material traceability, certified documentation, tight tolerances and verified performance.

QC1 nuclear-grade fasteners and machined components

At the LoneStar Group, our QC1 standards cover precision-engineered, high-performance, approved and accredited fasteners, bolts, nuts, studs, washers and many other advanced sealing technologies that are manufactured for use in critical industries, including

  • Nuclear (civil)
  • Energy
  • Power plants

Our QC1 nuclear-grade components are trusted to strengthen nuclear power plants and other advanced nuclear applications. They are designed, manufactured, tested and supplied to meet – and often surpass – the most extreme requirements of these demanding and safety-critical environments.

In addition to our QC1-categorised products, we also manufacture and supply ITS (Important to Nuclear Safety) category A, B and C fasteners, bolting and precision-machined components for the nuclear sector

Comprehensive documentation and quality assurance

We operate in full compliance with multiple internationally-recognised standards to ensure the highest levels of quality and safety.

Nuclear culture

We have ingrained a nuclear culture and a right-first-time, zero-defect mentality into our operations to drive excellence across the LoneStar Group.

Rigour and reliability

When specified, our products are manufactured using EN 10204: 2004 Type 3.2 certified materials, with full batch traceability and rigorous cleanliness controls throughout the production process.  

QC1 excellence throughout our market-leading product range

Alongside our QC1-categorised products, we supply Category A, B, and C ITS (Important to Safety) fasteners, bolting, and precision-machined components for nuclear applications. These components help to strengthen numerous applications across nuclear power plants, small modular reactors (SMRs) and waste management facilities.

Examples of where our QC1 and ITS fasteners have been deployed include:

  • Reactor pressure vessels 
  • Steam generators
  • Heat exchangers 
  • Containment systems 
  • Structural supports in containment buildings 
  • Pump and valve assemblies 
  • Waste containers 
  • Decommissioning projects

Contact our QC1 fasteners experts to discuss your requirements.

We look forward to collaborating with you.

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