The NRH 8131-48 is a versatile medium-duty butt hinge built for stable pivoting of equipment cases, tool boxes and cabinet doors. It features a built-in 90-degree opening stop that locks the lid or door firmly at 90° when fully opened. This hands-free positioning avoids manual holding, prevents accidental closing, and allows unobstructed access to internal tools, instruments and cabinet contents.
Made of high-quality iron with premium chrome plating finish, the hinge delivers decent anti-corrosion performance and sleek metallic appearance. Single piece weight is 51g, with a reference load capacity of 6kg when two hinges are installed, perfectly supporting medium-weight case lids and conventional cabinet doors. The structure runs smoothly, and the integrated stop mechanism maintains stable positioning after long-term frequent use.
Precision engineered with standardized dimensions: total length 48.5mm, leaf width 32.5mm and material thickness 2mm. Equipped with Φ4.3mm mounting holes at 34.5mm standard spacing for quick and firm installation. Key dimensions including 20mm and 44mm precisely define pivot range and 90-degree limit structure. All technical data is for product selection and structural integration reference only.
Product Spotlight: The Value of a 90-Degree Stop
The biggest highlight of NRH 8131-48 is its integrated 90-degree positioning stop design. It limits the opening angle strictly within 90 degrees and keeps the door panel locked in place steadily. No need to hold the lid by hand during operation, effectively preventing accidental swing and collision with surrounding walls or equipment. Chrome plated surface ensures the stop and pivot mechanism stay smooth and durable for long-term daily use.
Technical Specifications & Core Features
Based on official specification drawings and actual product performance:
- Durable Material & Finish: Made of solid iron with chrome plating, improving surface hardness and rust resistance for long-term indoor and conventional environment use.
- Practical Load Capacity: 6kg reference load for dual hinges, ideal for medium-duty toolbox lids, instrument cases and cabinet doors.
- 90-Degree Opening Stop: Built-in angle limiting structure fixes the panel at right angle, realizing hands-free access and safer operation.
- Precision Dimensional Engineering: Standard size and hole layout for easy replacement and batch assembly.
- Key Sizes: 48.5mm (L) x 32.5mm (W) compact structure.
- Mounting: Φ4.3mm holes with 34.5mm standard center spacing.
- Stop & Pivot Design: Precise 20mm, 44mm, 3.9mm and 0.9mm dimensions ensure accurate 90° limit and smooth rotation.
Ideal Application Scenarios
With 6kg stable load, built-in 90° stop and chrome anti-rust finish, NRH 8131-48 fits multiple daily and industrial matching scenarios:
- Frequently Accessed Cases & Boxes: Perfect for toolboxes, instrument cases and storage boxes; the fixed 90° opening allows both hands to take internal tools and equipment conveniently.
- Cabinet & Furniture Doors: Suitable for workshop cabinets, storage cabinets and display case doors, keeping fully open for easy access and ventilation.
- Access Panels & Covers: Ideal for medium-sized equipment access panels and console protective covers, staying open steadily during maintenance and operation.
Achieve stable, hands-free access with a hinge designed for convenience. The NRH 8131-48 perfectly combines medium-load bearing capacity and practical 90-degree stop function, providing a cost-effective and user-friendly pivoting solution for tool cases, equipment boxes and furniture cabinets.
For technical drawings or further information, please contact our team.