EN12209 European Door Lock

A sliding door hook lock is a type of locking mechanism specifically designed for sliding doors, which are commonly found in homes, offices, and various commercial settings. A sliding door hook lock's primary purpose is to offer a safe way to secure the door to its frame, preventing unwanted access and lowering the possibility of break-ins. It is difficult to pry open or disengage the lock because it usually consists of a hook-shaped latch that interlocks with a matching strike plate. To prevent tampering and guarantee long-lasting performance, the hook is frequently constructed of sturdy materials like steel or brass. The hook prevents the door from being easily slid open from the outside by securely locking it in place when it is engaged.

Sliding Door Hook Lock - Technical Specifications

• Model Number: DDML031
• Brand: D&D HARDWARE
• Material Composition: - Hook Bolt: Solid SUS304 Stainless Steel (hardness ≥ HRC 43, anti-bend/break) - Forend & Strike Plate: SUS304 Stainless Steel (corrosion-resistant)
• Backset: 50mm (compatible with sliding door thicknesses: 35–55mm)
• Forend Plate Specifications: Width 16mm × Height 158mm × Thickness 2.5mm
• Forend Type: Radius Head (curved edge design, matches modern、contemporary interiors)
• Finish Options: SSS (Satin Stainless Steel), PSS (Polished Stainless Steel), PVD (Matte Black/Bronze), PB (Polished Brass), AC (Antique Copper)
• Security Performance: Anti-pry hook design (withstands 600N pull force); weather-resistant (IP54 rating for semi-outdoor use)
• Warranty: 5 Years Mechanical Warranty

Sliding Door Hook Lock - Product Images and Videos

 

Sliding Door Hook Lock - Product Features & Advantages

• Full SUS304 Durability & Corrosion Resistance: Every component—from hook bolt to strike plate—is made of SUS304 stainless steel, passing 100-hour salt spray tests (no rust or oxidation). With a 15+ year service life, they outperform competitors made of zinc alloy or brass plating and are perfect for semi-outdoor areas like patio doors, coastal villas, and humid environments like bathroom sliding doors.
• Radius Head Forend for Aesthetic Versatility: The curved-radius forend avoids sharp edges, complementing modern、European, and contemporary sliding door designs. PVD black finishes complement metal door stoppers and black door handles, while SSS complements stainless steel door closers to ensure design coherence across door hardware systems.
• Anti-Pry Hook Lock Security: Two times stronger than typical sliding door latches, the solid steel hook firmly engages with the strike plate to withstand a 600N pull force. prevents unwanted lifting or prying of sliding doors, which are essential for office storage partitions, hotel poolside doors, and apartment balconies.
• Seamless Integration with D&D Door Systems: Designed to work with D&D’s sliding door handles (matching spindle size and finish)、door closers (for automatic sliding doors), and door seals (enhancing insulation and security). Standard mounting holes save contractors 25% on installation time by adhering to industry standards.
• Low Maintenance & Quiet Operation: The hook bolt's self-lubricating nylon inserts reduce metal-on-metal friction and guarantee silent locking and unlocking (≤28dB), making it ideal for home offices and bedroom sliding wardrobes. Requires only annual cleaning with a dry cloth (no harsh chemicals needed), cutting long-term upkeep costs.

Sliding Door Hook Lock - Installation & Usage Steps

1. Pre-Installation Preparation: Verify sliding door thickness (35–55 mm) and backset compatibility (50 mm); choose a finish that corresponds with D&D's door handle (e.g., PSS for luxury hotels, PVD black for industrial offices). - Gather tools: Drill (3mm/4mm bits), Phillips screwdriver, tape measure, pencil, level, and a small chisel (for strike plate recess).
2. Mark & Install the Lock Body: Use the included template to mark the lock body position on the sliding door’s edge (align with 50mm backset). - Drill pilot holes for the lock body screws, then secure the lock with provided SUS304 screws (tighten to 5–7 ft-lbs torque—avoid over-tightening to prevent door damage). Check the hook bolt: To extend or retract the hook, turn the lock cylinder; make sure it moves smoothly and doesn't jam.
3. Install the Strike Plate: Close the sliding door fully; mark the strike plate position on the door frame (align with the extended hook). To guarantee flush installation and avoid frame damage from the sliding door, chisel a shallow recess (depth = strike plate thickness, ~2.5mm). For solid wood frames, fasten the strike plate to the frame using long SUS304 screws; for hollow frames, use wall anchors.
4. Mount the Door Handle & Test Functionality: Attach D&D’s sliding door handle to the lock’s follower (insert the handle spindle into the lock’s internal mechanism). Use set screws to secure the handle; use the key to test locking and unlocking five times. The hook should fully engage the strike plate and retract without any resistance. - Slide the door back/forth to confirm no friction between the lock and frame; adjust the strike plate slightly if needed.
5. Usage & Maintenance Tips: To lock, shut the sliding door, put the key in, and rotate 90 degrees in a clockwise direction (hook extends into the strike plate). To unlock, slide the door open after turning the key 90 degrees counterclockwise, which causes the hook to retract. Every 12 months: To ensure smooth operation, add one drop of silicone oil to the hook bolt that comes with the lock.

Sliding Door Hook Lock - Application Scenarios

The DDML031 Sliding Door Hook Lock meets the demands of a wide range of international customers by performing exceptionally well in sliding door applications where security, durability, and aesthetics overlap:

• Sliding glass doors for balconies, living room patio doors, and bedroom wardrobe sliding doors are examples of residential (apartments, villas, and farmhouses) use cases. Value: The anti-pry design safeguards families; the radius-head forend complements cabinet handles for unified home decor; and SUS304 corrosion resistance withstands bathroom humidity and coastal salt.
• Hospitality (Hotels, Resorts, Boutique Inns): - Use Case: Guest room sliding balcony doors, dining area sliding partitions, poolside sliding doors. - Value: Silent operation avoids disturbing guests; durable finishes (e.g., PB) match luxury door hardware; IP54 rating suits semi-outdoor spaces (pool areas).
• Commercial (Office Buildings, Malls, Retail Stores): - Use Case: Sliding doors for office pantries, sliding glass doors for mall storefronts, and sliding partitions for co-working spaces. Value: Easy integration with smart lock cylinders (for keyless access); bulk-order compatibility lowers project costs; anti-pry security safeguards office supplies and merchandise.
• Institutional (Hospitals, Schools, Nursing Homes): - Use Case: Sliding doors for patient rooms in hospitals, classroom storage in schools, and balconies in nursing homes. Value: SUS304 satisfies hygienic requirements (easy to disinfect); silent operation promotes peaceful surroundings; sturdy design endures frequent use by employees and students.

Value for Buyers: Architects and designers: Achieve security without compromising style; door hardware palettes are complemented by the radius-head design and adaptable finishes. Contractors: 5-year warranty reduces callbacks; standard mounting and compatible door handles save time; bulk supply (200,000 units/month) satisfies strict project deadlines. - Facility Managers: Low maintenance cuts upkeep costs; SUS304 durability reduces replacement frequency; anti-pry design lowers security risks. - Homeowners: Enjoy peace of mind with reliable security; silent operation enhances living comfort; long lifespan avoids frequent lock replacements.

Sliding Door Hook Lock - Customization Options

• Material Upgrades: - SUS316 Stainless Steel: Improved corrosion resistance for chemical-intensive environments, coastal villas, and marine hotels (1000-hour salt spray test, no rust). 500 units is the MOQ.
• Finish and Design Customization: - RAL/Pantone Color Matching: Brand-specific colors for strike plates and forends, such as corporate branding or mall chain colors. MOQ: 300 units. - Square Head Forend: Replacement of radius head with square design (for traditional、industrial sliding doors). 1000 units is the MOQ. - Dual-Tone Finishes: SSS hook bolt + PVD black forend (matches modern office door hardware). 1000 units is the MOQ.
• Size & Function Adjustments: For non-standard sliding door thicknesses (such as barn door hardware or thick security sliding doors), the backset customization options are 40mm, 60mm, and 70mm. 1000 units is the MOQ. - Forend Dimension Modification: For large sliding doors, customize the width and height (e.g., W18xH160mm). 2000 units is the MOQ. Thumbturn Cylinder: Sliding doors in bathrooms and bedrooms have an internal thumbturn that can be unlocked without a key. 500 units is the MOQ.
• OEM/ODM Support: Custom logos on forwards, packaging, and user manuals (for hotel chains and regional door hardware distributors) are examples of private labeling. 2000 units is the MOQ. Custom Lock Body Design: Adapted hook angle and length for unique sliding door tracks (such as curved sliding doors in opulent villas). 3000 units is the MOQ.

Sliding Door Hook Lock - Production Process & Quality Control

Precision, security, and durability are given top priority in D&D's production process, guaranteeing that each DDML031 lock satisfies international quality standards:

1. Material Sourcing & Testing: - Choose SUS304/SUS316 stainless steel ingots from SGS-verified mills; verify the content of nickel (8% min.) and chromium (18% min.) using X-ray fluorescence (XRF); reject batches containing impurities. Verify material performance by conducting tensile strength tests (≥515MPa) and salt spray tests (100 hours for SUS304, 1000 hours for SUS316).
2. Precision Machining: - Forends & Strike Plates: CNC-machined to specifications (W16xH158xT2.5mm) with ±0.03mm tolerance; radius heads polished to 320-grit (SSS) or 1200-grit (PSS); vacuum-deposited PVD coating (2–3μm thickness, adhesion tested via tape pull). Hook bolts are heat-treated to HRC 43–45 (hardness test), precisely ground for smooth motion, and ultrasonically welded nylon inserts.
3. Assembly and Calibration: - Assemble lock parts (body, hook bolt, cylinder, and follower) in cleanrooms to prevent dust infiltration; manually adjust spring force (5±0.5N) and hook extension (10±1mm) for reliable operation. To make sure the hook engages and disengages smoothly, test key operation fifteen times for each lock.
4. Quality and Security Testing: - Functional Test: 50 locking and unlocking cycles are performed on 100% of locks to check for hook alignment, jamming, and silence. - Security Test: Randomly select 5% of each batch for 600N pull force testing (5 minutes, no hook deformation) and anti-pry testing (10 minutes with professional tools). Environmental Test: 24-hour IP54 dust/water test to ensure there is no internal corrosion or loss of functionality.
5. Packaging and Final Inspection: - SUS304 screws, an installation template, silicone oil, and a user manual are included with qualified locks, which are packaged in anti-scratch PE bags inside color or white boxes. Before shipping, do a final visual inspection to make sure everything is uniform and free of scratches, as well as a weight check to make sure nothing is missing.