UL Door Locks

A Simply send us your project requirements, including the door type, lock function, quantity and any certification or customization needs. Our experienced sales and engineering teams will recommend the most suitable UL Listed Mortise Lock solution and provide a competitive factory quotation together with technical documentation and professional support.

A D&D is a professional manufacturer of commercial architectural hardware, offering UL Listed Mortise Locks designed to meet North American fire and performance standards. Combining certified quality, precision manufacturing and flexible OEM & ODM capabilities, we help distributors, contractors and project developers deliver reliable door hardware solutions for commercial buildings worldwide.

A D&D UL Mortise Locks are designed for a wide range of commercial and institutional buildings, including office buildings, hotels, hospitals, schools, universities, government facilities, apartment developments and industrial projects. They are particularly suitable for high-traffic areas where certified fire protection, reliable security and long service life are required.

A Yes. As a professional manufacturer of commercial architectural hardware, D&D provides comprehensive OEM and ODM services for distributors, wholesalers and project customers worldwide. From customized lock functions and lever handle designs to private branding, cylinder systems, surface finishes and packaging solutions, our engineering team can develop products that meet your market and project requirements.

A D&D offers a comprehensive range of ANSI mortise lock functions to suit different building applications. Available options include passage, entry, classroom, office, storeroom, privacy, apartment, hotel guest, dormitory and dead lock functions, allowing architects and project contractors to select the most appropriate solution for each opening.

A D&D UL Mortise Locks are tested to 1,000,000 operating cycles in accordance with ANSI/BHMA Grade 1 requirements. Manufactured from heavy-duty stainless steel components, they are engineered to withstand continuous use in high-traffic environments such as office buildings, hospitals, schools, hotels and public facilities.

A Yes. D&D UL Door Locks are approved for installation on both steel and wooden fire-rated doors with fire ratings of up to 3 hours. They are specifically designed for commercial fire door systems and help preserve the integrity of the door assembly during a fire while delivering reliable daily operation.

A D&D UL Mortise Locks are manufactured to comply with major North American commercial hardware standards, including UL Listed requirements, ANSI/BHMA A156.13 Grade 1 performance, UL 10C positive pressure fire testing, ANSI A117.1 accessibility requirements, ADA compliance and NFPA 80 fire door regulations. These certifications ensure the locks are suitable for demanding commercial applications where safety, durability and code compliance are essential.

A UL File No. R40901 is the official UL listing file assigned to D&D's fire-rated mortise locks. It confirms that the product has successfully passed UL evaluation and is listed for installation on approved fire-rated door assemblies. The listing provides architects, contractors and distributors with confidence that the product meets recognized North American fire safety requirements.

A A UL Listed Door Lock is a commercial locking solution that has been independently tested and listed by Underwriters Laboratories (UL) for use on fire-rated door assemblies. It is designed to help maintain the fire resistance of certified doors while providing dependable security and long-term durability. UL Listed door locks are widely specified for commercial buildings, healthcare facilities, schools, hotels and other public projects where fire safety compliance is required.