Solid Brass Plain Joint Hinge

$0.85 ~ $2.50 / Piece/Pieces

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Model No.	DDBH008
Brand Name	D&D HARDWARE
Warranty Service	5 Years
After-sales service	Online Technical Support
Engineering solution capability	Graphic Design, 3d Model Design, Total Solution For Projects
Application scenario	Hotel, Villa, Apartment, Office Building, Hospital, School, Bathroom, Home Office, Bedroom
design style	Modern
place of origin	China
Size	3.5''/4.0''/4.5''/5.0''/6.0''
Thickness	2.0mm/2.5mm/3.0mm
Type	Solid Brass Plain Joint Hinge
Finish	SSS, PSS ,PVD , AB, AC,MB
Material	Solid Brass

Technical Specifications

Model Number	DDBH008
Brand	D&D HARDWARE
Material	Solid Brass
Size Options	3.0‘’, 3.5'', 4.0'', 4.5'', 5.0'', 6.0''
Thickness Options	2.0mm , 2.5mm , 3.0mm , 3.5mm , 4.0mm , 4.5mm
Type	Solid Brass Plain Joint Hinge (Non-bearing, low-profile design)
Finish Options	SSS(Satin Brass), PSS(Polished Brass), PVD(Matte Black/Bronze), AB(Antique Brass), AC(Antique Copper), MB(Matte Brass)

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Product Features & Advantages

Plain Joint Design: Simplicity & Versatility: The hinge’s streamlined, non-decorative design eliminates unnecessary protrusions, making it ideal for spaces requiring unobtrusive hardware. Unlike ornate hinges, its plain profile works seamlessly with both modern and traditional door plates and door knobs, ensuring design cohesion. The simplified joint mechanism reduces points of potential wear, enhancing long-term reliability in high-use areas.
100% Solid Brass Construction: Commercial-Grade Durability: Made from C36000 free-cutting brass (60% copper content), these hinges outperform brass-plated or zinc-alloy alternatives by 5x in lifespan. The dense brass structure resists corrosion from cleaning chemicals (common in hospitals, restaurants) and moisture (bathrooms, kitchens), while maintaining structural integrity under constant use—critical for doors opened/closed 50+ times daily.
Multiple Size & Thickness Options: Tailored to Application: With 5 sizes (3.5''–6.0'') and 3 thicknesses (2.0mm–3.0mm), the hinge accommodates diverse commercial needs: - 3.5''x2.0mm: Light partitions (office cubicles, retail fitting rooms) - 4.5''x2.5mm: Standard guest room doors (hotels, apartments) - 6.0''x3.0mm: Heavy entry doors (hospital main corridors, office lobbies) This range eliminates over-specifying, reducing material costs without compromising performance.
Easy Installation & Maintenance: The plain joint design simplifies installation—no specialized tools required beyond standard drilling equipment. Hinges come pre-drilled with countersunk holes for flush screw mounting, reducing installation time by 30% compared to complex decorative hinges. Maintenance is minimal: occasional lubrication with standard door hinge oil ensures smooth operation for years.
Compatible with Comprehensive Door Systems: Designed to integrate with D&D’s full range of door hardware, including panic exit devices (for emergency egress), door closers (for controlled closure), and thumbturn bathroom locks (for privacy). The hinge’s low profile avoids interference with locking mechanisms, ensuring the entire door system operates in harmony—essential for commercial safety and functionality.

Application Scenarios

Office Lobbies & Corridors: 5.0''x3.0mm size combines reliability and durability, with its plain joint design offering a streamlined, unobtrusive profile that complements both modern and traditional office aesthetics without distracting from the space. The 100% solid brass construction is robust enough to withstand heavy foot traffic and constant door use, ensuring long-term structural integrity—critical for high-traffic lobbies and corridors. It pairs seamlessly with D&D’s panic hardware for emergency exits, leveraging its compatibility with comprehensive door systems to ensure safe, efficient emergency egress while maintaining smooth daily operation.
Retail Stores & Malls: 4.5''x2.5mm size balances functionality and convenience, with its plain joint design simplifying installation and maintenance—ideal for busy store operations where time and efficiency are priorities. The 100% solid brass construction resists wear and tear from daily customer traffic, ensuring smooth operation even with frequent opening and closing of store doors. Its optimized size is tailored to standard retail door weights, eliminating over-specifying and reducing material costs, while the plain profile integrates seamlessly with various retail decor styles without drawing attention away from merchandise.
High-End Apartments: 3.5''x2.0mm size combines subtlety and quality, with its plain joint design offering a streamlined, unobtrusive profile that complements both traditional and modern apartment interiors. The 100% solid brass construction delivers long-lasting durability that enhances the apartment’s value, while developing a natural patina over time that adds character. It pairs seamlessly with D&D’s cabinet handles and door knobs, ensuring design cohesion throughout the space, and its optimized size is tailored to lightweight apartment doors—eliminating over-engineering while maintaining reliable, smooth operation.

Customization Options

D&D offers tailored customization for DDBH008 to meet project-specific requirements:

Size & Thickness Modifications: Custom dimensions (e.g., 3.0''x1.8mm for lightweight cabinets, 7.0''x3.5mm for oversized doors). Engineering team provides load-bearing calculations for non-standard sizes. MOQ: 500 units.
Material Upgrades: High-copper brass (70% Cu) for enhanced patina development (heritage restoration); naval brass (C46400) for coastal properties (superior saltwater corrosion resistance). MOQ: 500 units.
Finish Customization: Match RAL/Pantone codes for brand-specific projects (e.g., hotel chains); custom engraving (logo, project ID) on hinge leaves; anti-tarnish coatings for high-visibility areas. MOQ: 300 units.
Functional Enhancements: Pre-lubricated hinges with food-grade grease (restaurants, healthcare); countersunk or non-countersunk screw holes; security screws to prevent tampering. MOQ: 1000 units.
OEM/ODM Services: Private-label hinges with branded packaging, custom installation templates, and serialized batches for traceability. Offer hardware bundles (hinges + door handles + locks) for one-stop procurement.

Production Process & Quality Control

D&D’s production process ensures brass quality and hinge performance for commercial applications:

Brass Sourcing & Purification: Select C36000 brass ingots from SGS-verified mines; melt and refine to remove impurities (sulfur ≤0.01%). Test via X-ray fluorescence (XRF) to confirm copper content (60±2%).
Precision Stamping & Forming: Automated 300-ton stamping presses form hinge leaves with ±0.02mm tolerance. Plain joint edges are deburred to ensure smooth operation and safe handling during installation.
Drilling & Preparation: Computer-numerical control (CNC) drills create precise screw holes (countersunk or standard) with consistent depth, ensuring flush screw mounting and preventing leaf warping.
Surface Finishing: - SSS/PSS: Multi-stage abrasive polishing (120–320 grit for SSS; 400–1200 grit for PSS) followed by passivation to enhance corrosion resistance. - AB/AC/PVD: Chemical patination (AB/AC) or vacuum PVD coating (2–3μm thickness) for color stability and scratch resistance in high-traffic areas.
Final Quality Testing: - 100% visual inspection for finish uniformity, hole precision, and defect-free edges. - Random sample testing: 120kg load test (72 hours), 10,000-cycle swing test, and 240-hour salt spray test. - Functional verification: Full 180° swing test to ensure smooth operation without binding.
Packaging: Qualified hinges are packed in anti-tarnish bags (inside labeled boxes) with brass screws, installation templates, and maintenance instructions. Bulk orders include moisture-absorbing desiccants to protect brass during shipping.

Step-by-Step Installation Guide

Gather Tools & Hardware: Prepare a drill (3mm wood/metal bit), screwdriver, measuring tape, level, pencil, and DDBH008 hinges (2 hinges for ≤80kg doors; 3 for 80–120kg doors). Include D&D’s door handle and door lockset for complete functionality.
Mark Hinge Positions (Critical for Alignment): - Use a level to mark vertical lines on the door edge and frame: top hinge 150mm from door top, bottom hinge 200mm from door bottom. For 3 hinges, center the middle one equidistant between top and bottom. - Verify marks are collinear (use a string line) to prevent door sagging, which strains hinges and causes binding.
Prepare Mortises (For Full-Mortise Installation): - For wooden doors: Use a chisel to create mortises matching the hinge’s thickness (2.0mm/2.5mm/3.0mm) and size. The depth should allow the hinge leaf to sit flush with the door edge/frame. - For metal doors: Skip mortising (use surface-mounted installation) or use a router with a metal-cutting bit for mortises.
Secure Hinges to Door & Frame: - Attach door-mounted leaves with provided brass screws, tightening until flush (avoid over-tightening, which can warp the leaf). - Align the door with the frame, then fasten frame-mounted leaves—ensure the door swings freely without rubbing against the frame.
Adjust for Smooth Operation: - Test swing: Open/close the door 10 times to check for binding. If resistance occurs, loosen frame screws and add thin brass shims to adjust alignment. - Check clearance: Maintain a 2–3mm gap around the door to accommodate expansion (wooden doors) and ensure door seal effectiveness.
Finalize with Complementary Hardware: Install D&D’s door handle and deadbolt lock, then test the full system. Add a metal door stopper to protect walls and a door closer (for commercial spaces) to control closure speed.