An ideal choice for highly durable and long-lasting window hinges with superior corrosion resistance. At McCoy Hardware, we believe in offering the best quality window hardware. McCoy's Thunder Series SS304 Grade Friction Stay’s performance, durability, and corrosion resistance are superior to its competitors. This 4-bar friction hinge has been designed for light commercial and residential projects requiring long-term, reliable performance.
1. Superior Material Composition (SS304 - EN 1.4301)
SS304, or EN 1.4301, is one of the window hardware materials made from a stainless steel alloy with excellent durability. The SS304 composition includes an alloy mix showing high strength, resistance to corrosion, and ease of maintenance. Below is an accurate breakdown of the alloy mix:

Chromium: ≥ 17.5%
Nickel: ≥ 8%
Manganese: ~2%
Silicon: ~1%
Carbon: < 0.08%
Phosphorous: ~ 0.045%
Sulfur: ~ 0.03%
These elements contribute to SS304's exceptional properties, including:
Ultimate Tensile Strength: 1180 MPa
Fatigue Strength: 440 MPa
Shear Strength: 690 MPa
Hardness: Up to 360 BHN
Young's Modulus: 200 GPa
Because of these enhanced mechanical characteristics of SS304 alloys, the McCoy Thunder Series Friction Stay can work for windows with high usage and endure significant exposure to friction, impact, and fatigue for long durations without risk of damage.
2. Exceptional Resistance to Corrosion
Window hardware, which is subjected to varying surroundings, suffers the most from corrosion. Fortunately, Thunder Series McCoy Friction Stays solve this problem with their remarkable corrosion resistance features.
Pitting Resistance Equivalent Number (PREN): 20
Grade V Corrosion Resistance: Pass (Completed 500 hrs of salt spray test).
Unparalleled resistance to Intergranular corrosion.
These characteristics guarantee that the hinges are effective in highly corrosive environments, including regions near the coast or areas with high humidity.
3. Limiting Designs And Dimensions For Wider Use
For windows made of different materials, the McCoy Thunder Series Friction Stay has been made to be more flexible and adaptable. These are his specifications:
13 mm Stack Height - Accommodating for both Aluminium and uPVC (PVC-U) window profiles.
18 mm Base Channel Width - Appropriate for a large variety of frames for side hung as well as top hung vents in Aluminium and uPVC windows.
This set of dimensions enables the incorporation of the hinges in most window frames, including new as well as replacements.
4. Features of Performance That Impress

McCoy's Thunder Series of friction stays are tailored for maximum productivity, no matter the environment. They self-balance to avoid vibrations and allow the ability to open or close the window with absolute precision.
Depending on size, the window opening is between 40 and 88 degrees, and it allows for superb ventilation while maintaining the ability to access the window easily. When the window is closed, friction performs its primary function, supplying additional security and stability.
Capable of enduring strong positive and negative winds without causing the sash to be open. The outside face of the glass is extremely easy to maintain, allowing for the comfort of use while facilitating a cooling facade.
The design of the friction stay enables it to be clean and maintain long-lasting performance without needing constant care. These selected attributes of the product make the McCoy Thunder Series of friction stay a practical and easily operable product for the use of windows.
5. Window Dimensions & Weight Endurance
McCoy Thunder Series Friction Stay performs well with almost all window sizes and weights. Special features are as follows:
Appraised for side-hung vents as large as 1200 mm x 1200 mm and weight between 8kg to 30 kg
It also comes in a version for top-hung vents, which enables the use of most window types.
This permits the installation of even much larger, heavier windows, enabling them to function effortlessly without compromising the secure, strong, and enduring installation offered.
Why Choose The McCoy Thunder Series Friction Stay SS304 Grade Friction Stay?
The McCoy Thunder Series Friction Stay combines the modern needs of window hardware construction with a perfect solution. This is not just a hinge; it's a robust solution for both sides-hung and top-hung windows. The combined efficiencies of advanced materials, superior designs, and operational features make this friction durable and secure, providing the functionality required for reliable window systems.
They include:
Unparalleled corrosion resistance, especially within challenging environments
Increased strength and durability, making it suitable for residential and light commercial use
Practical, user-friendly design for maintenance-free, easy installation
10 Years of Performance Guarantee with Long-lasting Reliability and 24/7 Technical Support
McCoy Thunder Series Friction Stay is the perfect option for anyone looking for premium, durable, and corrosion-resistant window hinges because it is of the highest quality. The advanced SS304 material makes these friction hinges surpass all performance capabilities and provide long-term reliability, which is perfect for residential windows and light commercial constructions.
Get the advantage of advanced window functionality and durability with McCoy Thunder Series now!
Product Page, Product Video, and TDS: McCoy Thunder Series Friction Stay
For assistance, call us today at +91-8010434434 or email order@mccoygroup.in
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