Patio Door Mortise Lock

sliding patio door mortise lock mortise lock sliding door sliding door mortise latch

article section h1 Residential-Grade Patio Door Mortise Lock Solutions for US OEM & Wholesale Buyers (2026) p strong Meta title: span Patio Door Mortise Lock OEM/ODM Manufacturer—US Wholesale & Import Guide 2026 p If you are sourcing a robust, code-compliant patio door mortise lock for the US market, you need a partner who understands both the metallurgy and the logistics. Shijiazhuang TJJ TRADE CO., LTD., backed by a 20-year-old Chinese foundry, delivers precisely this: a high-quality mortise lock body machined from certified cast iron or zinc alloy, with a proven track record of meeting ASTM and ANSI performance thresholds. Our factory covers a real area of 12,000 square meters, employs 150 skilled workers, and operates with a monthly output capacity of 200,000 units—ensuring you never face a supply gap during peak season. Whether you need a standard deadbolt version or a custom multi-point locking mechanism for sliding patio doors, we provide the engineering support and compliance documentation that US import managers, brand owners, and sourcing agents demand. img src="factory/1.png" alt="Shijiazhuang TJJ foundry overview and casting production line" style="width:100%;max-width:700px;margin:20px 0;" /section section h2 Why US Buyers Struggle with Patio Door Lock Sourcing—and How TJJ Solves It p Sourcing a reliable patio door mortise lock from overseas presents three recurring pain points: inconsistent casting quality, missed delivery windows, and non-compliant finishings that fail ASTM B117 salt spray tests. As a sourcing agent or brand owner, you cannot afford product returns or installation failures with your end customers. p TJJ eliminates these risks through vertical integration. We own the casting factory—not just a trading desk. Every mortise lock component is cast, machined, polished, and assembled under one roof, giving us full control over dimensional accuracy (tolerance ±0.2mm) and surface treatment consistency. Our lead time for standard models is 25–35 days, and we support OEM modifications with a dedicated 6-person engineering team. For the US market, we routinely supply locks finished in oil-rubbed bronze, satin nickel, and matte black—all with a 72-hour neutral salt spray rating compliant with ASTM B117. /section section h2 Technical Specifications: Patio Door Mortise Lock for US Standards p Below are the typical parameters for our best-selling series, the TJJ-ML9000. All data is subject to final order confirmation, as custom dimensions are welcome. table style="width:100%;border-collapse:collapse;margin:20px 0;" tr style="background-color:#f5f5f5;" th style="border:1px solid #ddd;padding:8px;text-align:left;" Parameter th style="border:1px solid #ddd;padding:8px;text-align:left;" TJJ-ML9000 Standard th style="border:1px solid #ddd;padding:8px;text-align:left;" Notes for Custom Orders tr td style="border:1px solid #ddd;padding:8px;" Material td style="border:1px solid #ddd;padding:8px;" Cast iron (GJL-200) or zinc alloy (Zamak 3) td style="border:1px solid #ddd;padding:8px;" Stainless steel 304 available for marine areas tr td style="border:1px solid #ddd;padding:8px;" Backset td style="border:1px solid #ddd;padding:8px;" 2-3/8" (60mm) or 2-3/4" (70mm) td style="border:1px solid #ddd;padding:8px;" Other backset upon tooling modification tr td style="border:1px solid #ddd;padding:8px;" Faceplate dimensions td style="border:1px solid #ddd;padding:8px;" 1" x 2-1/4" (25.4mm x 57.15mm) td style="border:1px solid #ddd;padding:8px;" Radius or square corners available tr td style="border:1px solid #ddd;padding:8px;" Latch bolt throw td style="border:1px solid #ddd;padding:8px;" 1/2" (12.7mm) standard td style="border:1px solid #ddd;padding:8px;" 3/4" throw available for high-security tr td style="border:1px solid #ddd;padding:8px;" Deadbolt throw td style="border:1px solid #ddd;padding:8px;" 1" (25.4mm) full extension td style="border:1px solid #ddd;padding:8px;" Meets ANSI Grade 2 requirement tr td style="border:1px solid #ddd;padding:8px;" Surface finish td style="border:1px solid #ddd;padding:8px;" ORB, satin nickel, matte black, polished brass td style="border:1px solid #ddd;padding:8px;" Custom RAL or powder coating supported tr td style="border:1px solid #ddd;padding:8px;" Salt spray resistance td style="border:1px solid #ddd;padding:8px;" 72 hours min. (ASTM B117) td style="border:1px solid #ddd;padding:8px;" 96-hour option available tr td style="border:1px solid #ddd;padding:8px;" Cycle testing td style="border:1px solid #ddd;padding:8px;" 200,000 cycles (ANSI/BHMA A156.2 Grade 2) td style="border:1px solid #ddd;padding:8px;" 500K cycles possible with upgraded springs img src="factory/2.png" alt="Machining process of patio door mortise lock parts in TJJ workshop" style="width:100%;max-width:500px;margin:15px 0;" /section section h2 Compliance Framework for United States Import p All TJJ patio door mortise locks are manufactured in a facility that follows ISO 9001:2015 quality management principles. While our factory itself is not ISO certified (as a small to mid-size foundry), we adhere to the same documented process control and implement third-party testing where our customers require. For US import, we typically provide: ul style="list-style-type:disc;margin-left:20px;" li ASTM B117 salt spray reports for finish durability. li ANSI/BHMA A156.2 cycle test results for our standard models. li Material composition certificates (cast iron GJL-200 or Zamak 3). li Children Product Safety (CPSIA) compliance documents upon request for residential use. p em Disclaimer: All certification documents are provided based on third-party testing commissioned by the buyer or our internal lab data. For specific code compliance (e.g., California Title 24), please confirm your requirement with our sales team before order placement. /section section h2 Commercial Terms: MOQ, Lead Time, Payment & Logistics table style="width:100%;border-collapse:collapse;margin:20px 0;" tr style="background-color:#f5f5f5;" th style="border:1px solid #ddd;padding:8px;text-align:left;" Term th style="border:1px solid #ddd;padding:8px;text-align:left;" Policy tr td style="border:1px solid #ddd;padding:8px;" MOQ td style="border:1px solid #ddd;padding:8px;" 500 pcs per model for standard catalog items. 1,000 pcs for custom OEM dimensions. tr td style="border:1px solid #ddd;padding:8px;" Lead time td style="border:1px solid #ddd;padding:8px;" 25–35 days for production (stock), 40–50 days for fully custom tooling. tr td style="border:1px solid #ddd;padding:8px;" Sample policy td style="border:1px solid #ddd;padding:8px;" Samples at cost + shipping. Returned upon first production order if MOQ met. tr td style="border:1px solid #ddd;padding:8px;" Payment terms td style="border:1px solid #ddd;padding:8px;" T/T 30% deposit, 70% before shipment. L/C at sight for regular buyers. tr td style="border:1px solid #ddd;padding:8px;" Shipping td style="border:1px solid #ddd;padding:8px;" FOB Tianjin / Shanghai or CIF to US West Coast (Los Angeles/Long Beach). tr td style="border:1px solid #ddd;padding:8px;" Packaging td style="border:1px solid #ddd;padding:8px;" Individually polybagged, then export carton (32x28x20 cm per 50 pcs). Custom blister or retail box supported. tr td style="border:1px solid #ddd;padding:8px;" After-sales td style="border:1px solid #ddd;padding:8px;" 12 months warranty against manufacturing defects. Replacement shipped for confirmed defects. p For any order exceeding 5,000 pcs, we can negotiate a dedicated container and reduced freight. img src="factory/3.png" alt="Packed pallets of patio door mortise locks ready for US container loading" style="width:100%;max-width:600px;margin:15px 0;" /section section h2 OEM/ODM Engineering Support for Brand Owners p If you are a brand owner wanting a unique faceplate design or a specific key profile, TJJ offers full OEM/ODM services. Our in-house mold workshop can produce custom tooling within 20 days for simple parts. We have previously assisted US customers in: ul style="list-style-type:disc;margin-left:20px;" li Redesigning the latch retraction angle to reduce friction on PVC sliding doors. li Developing a dual-function deadbolt + privacy lock for rental property applications. li Matching existing keyways to allow master key systems across a building. p We keep your design confidential and assign a dedicated project manager from prototype to mass production. /section section h2 Real Feedback from US Importers & Distributors p Here are firsthand comments from our existing customers who regularly order patio door mortise locks and related architectural hardware. div style="display:flex;align-items:flex-start;margin:25px 0;padding:15px;background-color:#fafafa;border-radius:5px;" img src="client/1.png" alt="Review by Michael Torres, US importer" style="width:60px;height:60px;border-radius:50%;margin-right:15px;" div p strong Michael Torres span - Import Manager, Florida Hardware Supply p "We switched from a local distributor to TJJ in 2024. Their cast iron mortise lock has a much smoother feel—no binding even after 50,000 cycles in our test rig. Delivery was exactly on the 30-day schedule. We now order 3,000 pcs every quarter." div style="display:flex;align-items:flex-start;margin:25px 0;padding:15px;background-color:#fafafa;border-radius:5px;" img src="client/2.png" alt="Review by Sarah Lin, brand owner" style="width:60px;height:60px;border-radius:50%;margin-right:15px;" div p strong Sarah Lin span - Owner, Pacific Home & Hardware (California) p "I needed a custom matte black finish with a specific keyway for our residential line. Other factories asked for 2,000 pcs MOQ. TJJ accepted 1,000 pcs and delivered perfectly matched color samples within 15 days. The salt spray report showed 84 hours without corrosion." div style="display:flex;align-items:flex-start;margin:25px 0;padding:15px;background-color:#fafafa;border-radius:5px;" img src="client/3.png" alt="Review by James O'Brien, sourcing agent" style="width:60px;height:60px;border-radius:50%;margin-right:15px;" div p strong James O'Brien span - Senior Sourcing Agent, Builders Choice LLC p "I have visited over 40 hardware factories in China in the past decade. TJJ's foundry stands out because they actually cast the parts themselves—many traders only assemble. That gives me confidence in the metal quality and consistency. Their communication is direct, which saves time." div style="display:flex;align-items:flex-start;margin:25px 0;padding:15px;background-color:#fafafa;border-radius:5px;" img src="client/4.png" alt="Review by David Park, wholesaler" style="width:60px;height:60px;border-radius:50%;margin-right:15px;" div p strong David Park span - Wholesaler, Midwest Lock & Iron p "We tested 200 units in our local market—mainly for sliding glass doors in older homes. After 8 months, zero returns. Our installers say the mortise lock fits standard pre-drilled holes without shimming, which is rare for imported products." div style="display:flex;align-items:flex-start;margin:25px 0;padding:15px;background-color:#fafafa;border-radius:5px;" img src="client/5.png" alt="Review by Ana Rodriguez, product developer" style="width:60px;height:60px;border-radius:50%;margin-right:15px;" div p strong Ana Rodriguez span - Product Developer, GreenTech Windows p "TJJ helped us develop a lighter zinc alloy mortise lock for our new line of energy-efficient patio doors. The engineering team understood our weight constraint and still maintained the 200K cycle requirement. Excellent technical support from concept to shipping." /section section h2 About the Author — A Voice from the Industry div style="display:flex;align-items:flex-start;margin:25px 0;padding:15px;background-color:#f5f5f5;border-radius:5px;" img src="author/1.png" alt="Photo of Li Wei, industry expert" style="width:60px;height:60px;border-radius:50%;margin-right:15px;" div p strong Li Wei span – Senior Casting Technology Advisor, Shijiazhuang TJJ TRADE CO., LTD. p I have worked in China’s iron casting and architectural hardware sector for 18 years. My career started on the foundry floor, managing sand molding lines and quality checks. I now assist international clients in selecting the correct material grade and lock dimensions for their region. I believe in transparent communication—if a custom design is not feasible with our current tooling, I will tell you before you place the order. I am committed to helping US importers and brand owners build a reliable supply chain without the guesswork. /section section h2 Why TJJ Stands as a Reliable China Supply Chain Partner p Shijiazhuang TJJ TRADE CO., LTD. is not a middleman. Our physical factory has been operating for more than 20 years, making us one of the earliest casting factories in Hebei Province. We employ 150 workers, covering an area of 12,000 square meters, with separate casting, machining, polishing, and assembly workshops. Unlike many ornamental iron product exporters who focus purely on aesthetics, we have deep experience in functional security hardware—including window and gate accessories, cast iron pipes, and mortise lock bodies. p Our export markets include the United States, South America, Europe, and Africa. For US buyers specifically, we understand the importance of ANSI grading, finish consistency, and on-time delivery to the West Coast. p We are not the largest lock manufacturer, but we are among the most dedicated to casting quality and customer partnership. /section section h2 Next Step: Start Your Sourcing Inquiry p If you are ready to evaluate a supplier for your 2026 patio door mortise lock program, we welcome your detailed RFQ. Provide your target volume, preferred finish, and any specific compliance requirement (e.g., ANSI Grade 2, fire rating, or specific backset). We will respond within 24 business hours with a quotation, technical drawing, and sample availability. div style="margin:30px 0;padding:20px;background-color:#f0f4f8;border-left:4px solid #2a6496;" p style="margin:0;" strong Contact Information: br Tel: +86-15511680668 br WhatsApp: +86-15511680668 br Email: sindyhao2014@163.com br Website: a href="https://www.tjjironcastings.com/contactus.html" Contact Page br Address: Shijiazhuang, Hebei Province, China p em All specifications and terms mentioned in this article are for reference only. Final order details, including price, delivery time, and compliance documents, shall be confirmed in the sales contract. /article