Modern main door hinge with fire rated

Stainless Steel Flag Door Hinge with Flat Head - Model DDSS031

1. Product Overview

As a key part of D&D HARDWARE’s premium door hardware lineup, the Stainless Steel Flag Door Hinge with Flat Head (Model: DDSS031) combines universal compatibility with exceptional durability. Designed for both residential and commercial door hinges applications, this flag hinge features a sleek flat head structure that ensures a secure, flush fit—eliminating protruding edges and creating a clean, polished finish on any door or frame.

Crafted from high-grade stainless steel, it delivers strong corrosion resistance and long-lasting mechanical performance, making it suitable for diverse environments from hotel lobbies to residential bathrooms. Its versatile design seamlessly integrates with D&D’s door handles, door locks, and door closers, forming a cohesive door system that enhances both functionality and aesthetics. Whether you’re upgrading existing door accessories or equipping new buildings, the DDSS031 flag hinge is a reliable choice for smooth, consistent door operation.

2. Technical Specifications

• Brand: D&D HARDWARE
• Model Number: DDSS031
• Product Type: Flag Door Hinge with Flat Head
• Material: Stainless Steel 201, 304, 316 (optional, based on environmental needs)
• Surface Finish: SSS (Satin Stainless Steel), PSS (Polished Stainless Steel), AB (Antique Brass), AC (Antique Copper), PVD (Physical Vapor Deposition)
• Standard Size: 102x85x3.0mm (optimized for most standard door thicknesses)
• Design Style: Modern, Traditional, Contemporary, Industrial (compatible with diverse architectural themes)
• Warranty: 5 Years (backed by D&D’s professional after-sales support)
• After-sales Service: Online Technical Support (response within 24 hours for troubleshooting)
• Engineering Capabilities: Graphic Design, 3D Model Design (supports custom technical documentation)
• Place of Origin: Jiangmen, Guangdong, China (manufactured in D&D’s ISO-certified facility)

3. Product Images and Videos

4. Product Features & Advantages

• Flat Head Design for Clean Aesthetics: Eliminates protruding parts, creating a flush fit with door frames—ideal for modern interiors where sleek design is a priority. Avoids dust accumulation and simplifies cleaning compared to hinges with raised heads.
• High-Grade Stainless Steel Durability: Available in SUS201 (cost-effective for dry indoor areas), SUS304 (general-purpose corrosion resistance), and SUS316 (high resistance for coastal/humid environments like bathrooms or outdoor entries). Ensures no rust or deformation even after long-term use.
• Universal Compatibility: Fits most door types (wooden, metal, composite) and thicknesses, making it suitable for residential apartments, commercial offices, and hospitality projects. Seamlessly pairs with D&D’s panic exit devices and door closers for commercial safety compliance.
• Smooth & Quiet Operation: Precision-machined hinge pins and bushings reduce friction, ensuring door opening/closing is silent and smooth—critical for noise-sensitive areas like hospitals, libraries, or hotel guest rooms.
• Strict Quality Control: Manufactured under D&D’s ISO 9001 quality management system. Each hinge undergoes load testing (supports up to 80kg door weight) and salt spray corrosion testing, meeting international standards (CE, UL, ANSI) for reliable performance.

5. Installation Steps

1. Prepare Tools & Materials: Gather a drill, Phillips screwdriver, measuring tape, pencil, and the included mounting screws (provided with each hinge). For heavy doors, prepare a door jack to support the door during installation.
2. Mark Hinge Positions: Use a measuring tape to mark 3-4 hinge positions on the door edge and corresponding frame (standard spacing: 150mm from top/bottom of the door, with additional hinges evenly spaced for tall/heavy doors). Align marks with a level to ensure vertical accuracy.
3. Install Hinge Plates on Door Frame: Attach the fixed plate of the flag hinge to the door frame using the provided screws. Tighten screws evenly to avoid warping the plate—ensure the flat head sits flush with the frame surface.
4. Mount Hinge Plates on Door Edge: Attach the movable plate of the hinge to the door edge, aligning it with the frame plate. Use a drill to pre-drill pilot holes (to prevent wood splitting) before inserting screws.
5. Test Operation & Adjust: Lift the door into place and test opening/closing. Check for smooth movement—if the door sticks, loosen screws slightly and re-align the hinge plates. Tighten all screws fully once adjustment is complete.
6. Final Inspection: Confirm the flat head design is flush with both door and frame. For commercial projects, pair with D&D’s door stops to prevent hinge damage from excessive door swing.

6. Application Scenarios

The DDSS031 Stainless Steel Flag Door Hinge with Flat Head is a versatile door accessory designed for diverse residential and commercial environments, including:

In commercial settings (e.g., hospitals, malls), it pairs with D&D’s panic exit devices to meet safety codes, while in residential spaces, it complements cabinet handles and door knobs for a unified interior style. Its corrosion resistance makes it ideal for bathrooms and outdoor entries, where moisture is a concern.

7. Value for Buyers

• Cost Efficiency: Durable stainless steel construction reduces replacement frequency (5-year warranty), while the universal design eliminates the need for multiple hinge types—lowering inventory and procurement costs.
• Design Versatility: Multiple finishes (SSS, PSS, AB, AC, PVD) and compatibility with diverse design styles allow seamless integration into any project, from industrial offices to traditional villas.
• Compliance Assurance: Meets international standards (CE, UL, ANSI) and pairs with D&D’s certified door hardware, ensuring projects pass local building codes—critical for global buyers.
• Reliable Supply: Monthly production capacity of 200,000 pieces supports large-scale orders, with flexible Incoterms (FOB, CFR, CIF, EXW, FCA, DDP, DDU, Express Delivery) to meet diverse logistics needs.
• Reduced Maintenance: Corrosion-resistant materials and smooth operation minimize maintenance efforts—ideal for property managers or hospitality clients who prioritize low-upkeep solutions.

8. Certifications and Compliance

The DDSS031 Flag Door Hinge adheres to D&D HARDWARE’s strict compliance standards, ensuring compatibility with global markets:

• System Certification: Manufactured in an ISO 9001-certified facility, ensuring consistent quality across every production batch.
• Product Certifications: Complies with CE (European safety standards) and UL (American safety standards), with design alignment to ANSI/BHMA (American National Standards Institute/Builders Hardware Manufacturers Association) guidelines for door hinges.
• Material Compliance: Stainless steel materials (SUS201/SUS304/SUS316) meet RoHS requirements, ensuring no harmful substances—suitable for eco-friendly building projects.

9. Customization Options

D&D HARDWARE offers OEM/ODM customization for the DDSS031 hinge to meet buyer-specific needs:

• Material Customization: Select SUS201 (budget-friendly for dry areas), SUS304 (general-purpose), or SUS316 (high corrosion resistance for coastal/humid regions) based on project requirements.
• Finish Customization: Add custom finishes (e.g., matte black PVD, brushed gold) to match brand aesthetics or project design themes—ideal for luxury hotels or high-end residential projects.
• Size Customization: Adjust dimensions (length, width, thickness) to fit non-standard doors or frames, supported by D&D’s 3D model design service for technical validation.
• Packaging Customization: Use custom-printed boxes (with buyer logos or product information) instead of standard white/color boxes—suitable for distributors or brand owners.