Sliding door lock

For coastal or high-humidity areas, prioritize 304 or 316 Stainless Steel to prevent corrosion. For interior residential use, Zinc Alloy is a cost-effective choice that offers excellent design flexibility and electroplating finishes. If the lock is for heavy-duty commercial sliding doors, ensure the hook bolt is made of hardened steel to resist forced entry and physical wear.

You must verify the Backset distance (usually 20mm to 60mm for sliding doors) and the Door Thickness compatibility (standard ranges are 35mm-50mm). For aluminum profile doors, slim-frame locks with a narrow lock body (e.g., 20mm-30mm width) are essential. Always request a technical drawing from the supplier to confirm the cylinder hole alignment and strike plate dimensions.

Look for products that meet EN 12209 (European standard for locks) or ANSI/BHMA Grade 1 or 2 for North American markets. If sourcing Smart Sliding Door Locks, ensure they carry CE, FCC, and RoHS certifications. For fire-rated doors, the lock must have a Fire Resistance Certification (e.g., UL 10C) to ensure it maintains structural integrity during high-heat events.

Professional buyers should demand a Cycle Test Report. High-quality locks should withstand at least 100,000 to 200,000 cycles without mechanical failure. Additionally, check the Salt Spray Test (SST) rating; a minimum of 48-96 hours is standard, but premium outdoor locks should exceed 240 hours to guarantee long-term surface finish quality.

Always request a pre-shipment inspection (PSI) by a third-party agency like SGS or Intertek. Focus on sampling the plating thickness and mechanical spring tension. On Made-in-China.com, prioritize Audited Suppliers who have undergone on-site factory verifications to ensure their production capacity matches your order volume.

Beyond the unit price, negotiate the Master Key System (MKS) requirements and spare parts ratio (usually 1-2% for screws and cylinders). Discuss custom packaging (OEM) to ensure the branding is consistent. For bulk orders, aim for a 10-15% discount when exceeding 2,000 units, and clarify the warranty period (ideally 2-5 years).

Locks are heavy; therefore, Sea Freight (LCL/FCL) is the most economical method for bulk orders. Ensure the supplier provides the correct HS Code (typically 8301.40) to avoid customs delays or incorrect duty applications. If the locks contain lithium batteries (for smart versions), they must be shipped under UN38.3 regulations with proper dangerous goods documentation.

Use Secured Trading Services provided by platforms like Made-in-China.com to protect your payment until the goods are shipped. Avoid direct transfers to private bank accounts; always use Corporate Accounts that match the supplier's registered business name. Implement a 30% deposit and 70% balance payment structure against the Bill of Lading (B/L).