Yale Defender 16" Restricted Friction Stay Hinges (Pair) – Left Hand | EDSR16-PL
Yale Defender 16" Restricted Friction Stay Window Hinges (Left Hand Pair) | EDSR16-PL
Upgrade the safety of your outward-opening casement windows with genuine Yale Defender 16” Restricted Friction Stay Hinges. Supplied as a left-hand pair (13mm stack height), these hinges feature a built-in restrictor mechanism to limit window opening to 100mm, providing essential child safety and fall prevention while allowing for smooth, everyday ventilation.
Product Overview
The Yale Defender 16” Restricted Friction Stay Hinge (Product code: EDSR16-PL) is the industry-standard replacement for side-hung casement windows requiring restricted opening. Designed to maximize safety in residential settings, high-rise apartments, and multi-occupancy buildings, these hinges restrict the initial window opening to a maximum of 100mm to comply with Building Regulations Part K.
The built-in child-resistant catch is located on the bottom hinge. When full access is needed for cleaning or maximum ventilation, a quick-release lever allows the sash to open completely. For ultimate peace of mind, the restrictor automatically relocates and resets as soon as the window is pulled shut, ensuring the safety feature is never accidentally left disengaged.
Manufactured in Britain to precise standards, the Yale Defender features a robust cam friction device to prevent screw misuse, an asymmetric location system for reliable closure, and an extended end cap for superior weather sealing.
Please Note: Side-hung restricted hinges are supplied as a handed pair. The set includes one restricted hinge (which must be fitted at the bottom) and one standard non-restricted hinge (for the top).
Key Features
- Built-in Safety Restrictor: Limits initial opening to 100mm to prevent accidental falls (BS EN 13126-5 tested).
- Auto-Reset Mechanism: The restrictor automatically re-engages when the window is closed.
- Quick Release Lever: Allows the window to open fully for safe, easy cleaning from the inside.
- Improved Weather Sealing: Extended enclosed end cap and vent arm design for exceptional draught-proofing (BS 6375-1).
- Highly Durable: Endurance cycle tested to 30,000 operations and corrosion tested to 96 hours.
- Fully Certified: Secured by Design approved and BBA certified.
- Made in Britain: Genuine Yale (ASSA ABLOY) manufacturing.
Technical Specifications
| Brand | Yale (ASSA ABLOY) |
| Range | Defender Restricted |
| Product Code | EDSR16-PL |
| Hinge Type | Side-Hung Friction Stay |
| Length | 16 Inch (approx. 413mm) |
| Stack Height | 13mm |
| Track Width | 18mm |
| Handing | Left Hand (LH) |
| Max Window Weight | 24 kg |
| Max Window Width | 700 mm |
| Sold As | 1 Pair (1x restricted bottom hinge, 1x standard top hinge) |
Frequently Asked Questions & Fitment Guide
How do I know if I need a Left Hand (LH) hinge?
View your window from the outside of the building. If the hinges are mounted on the left side when the window opens outward, you need a Left-Hand pair.
How do I measure the "stack height"?
Open the window and measure the thickness of the hinge mechanism where the metal arms stack together against the frame. This specific model has a 13mm stack height (typically recognized by completely flat hinge arms). If your current hinge arms have a visible kink or dip, you likely need a 17mm stack height.
Does the restricted hinge go at the top or bottom?
For side-hung casement windows, the restricted hinge included in this pack must be fitted at the bottom of the window. The standard (non-restricted) hinge goes at the top.
How does the auto-reset safety feature work?
When you open the window, the built-in restrictor automatically stops it at a maximum of 100mm. To open the window fully (e.g., for cleaning), press the quick-release lever. The best part is the auto-reset: as soon as you pull the window shut, the restrictor automatically re-engages so it's always protecting your family the next time the window is opened.
