Sargent 8256 Office & Inner Entry Mortise Lock with EcoFlex Technology – Grade 1 Heavy Duty Single CylinderIndustry Benchmark Mortise Lock with Maximum Security and PerformanceThe Sargent 8256 mortise lock represents the industry benchmark for commercial mortise locks, delivering maximum security, performance, and durability with high-quality components. This Grade 1 heavy duty single cylinder lock features a 2 3/4″ backset, 1 3/4″ door thickness compatibility, and 3/4″ latchbolt throw for reliable operation. The electromechanical version operates from 12 to 24VDC with revolutionary EcoFlex technology that reduces power consumption up to 96%, while maintaining UL 10C fire rating up to 3 hours and ANSI/BHMA A156.13 Series 1000 certification.Professional Features & Benefits Door Compatibility: Standard 2 3/4″ backset with 1 3/4″ door thickness and field reversible handing accommodates diverse installation requirements. Exceptional Durability Rating: UL Cycle Above and Beyond test completed at 16 million cycles (Verification ID: V584148) for unmatched longevity in high-traffic commercial applications. Revolutionary Power Efficiency: EcoFlex technology on all electromechanical functions operates from 12 to 24VDC with up to 89% energy savings for flexible system integration. Heavy-Duty Construction: Grade 1 operational rating with patented design and construction delivers the strongest and most durable mortise lock performance in the industry. Universal Key System Integration: Integrates with all SARGENT key systems including Degree, Signature, KESO, and XC for seamless security management. Comprehensive Fire Rating: UL 10C Fire-Rated up to 3 hours with UL-cUL listing and NFPA 80 compliance for critical fire safety applications. Extensive Function Availability: Available in 56 different functions including electromechanical, security and monitoring options with behavioral health trim and status indicators. Manufacturer Warranty: 10-year limited warranty with 2-year coverage on electrical components for added confidence and protection.Technical Specifications Refer to manufacturer documentation for complete technical specifications.Installation & Operation Verify electrical requirements match available power supply. Confirm voltage (12 to 24VDC) and current capacity before proceeding. Disconnect power supply before beginning installation. Follow all applicable electrical codes and safety procedures. Mount the unit in the specified location ensuring adequate clearance for wiring access, ventilation, and future service requirements. Route and connect wiring according to manufacturer wiring diagrams. Use appropriate wire gauge and connectors for the application. Configure operational settings including any configurable options per application requirements. Restore power and test all functions including normal operation, alarm/alert functions, and integration with connected systems. Complete final inspection and document settings. Refer to manufacturer documentation for complete wiring diagrams, programming instructions, and troubleshooting.Professional Applications Commercial Building Security Systems Educational Institution Access Control Healthcare Facility Security Government and Municipal Buildings Multi-Tenant Residential Properties Industrial Facility Access Points Retail Loss Prevention SystemsWhy Choose Sargent Quality?Sargent 8256 mortise locks deliver professional-grade reliability with patented design and construction rated for 16 million cycles in independently verified testing. The 10-year limited warranty with 2-year electrical component coverage demonstrates Sargent’s commitment to quality. Engineered for demanding commercial applications where dependable performance, fire safety compliance, and energy efficiency are essential.