Sargent 8289-ET Grade 1 Holdback Function Mortise Lock with Heavy Duty Escutcheon TrimIndustry Benchmark Mortise Lock with Maximum Security PerformanceThe Sargent 8289-ET represents the industry benchmark for commercial mortise locks, delivering maximum security, performance, and durability with high-quality components. This Grade 1 holdback function escutcheon trim features a multi-functional lock body with 2 3/4″ backset depth, 1 3/4″ door thickness compatibility, and 3/4″ latchbolt throw. The robust design integrates with all SARGENT key systems including Degree, Signature, KESO, and XC, while offering field reversible handing for installation flexibility.Professional Features & Benefits Precision Dimensions: 2 3/4″ backset depth with 1 3/4″ door thickness compatibility and 3/4″ latchbolt throw for standard commercial door applications. Heavy-Duty Durability: UL Cycle Above and Beyond test completed at 16 million cycles (Verification ID: V584148) for exceptional long-term reliability in high-traffic commercial applications. Grade 1 Performance: ANSI/BHMA A156.13 Series 1000 Operational Grade 1 certification ensures maximum security and performance standards for commercial use. Universal Key System Integration: Compatible with all SARGENT key systems including Degree, Signature, KESO, and XC for comprehensive access control flexibility. Multi-Functional Design: Available in 56 different functions including electromechanical, security and monitoring options with on-site function switching capability. Fire-Rated Construction: UL 10C Fire-Rated up to 3 hours with positive pressure certification for life safety applications. ADA Compliance: Americans with Disabilities Act compliant design meets accessibility requirements for commercial installations. 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 Review manufacturer specifications and verify door preparation requirements including 1 3/4″ door thickness, 2 3/4″ backset depth, and field reversible handing configuration. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for mortise lock installation. Prepare door and frame by drilling required holes and routing mortise pocket as specified in manufacturer instructions. Install all mounting hardware and secure the lock body and escutcheon trim to door per manufacturer torque specifications. Adjust operational components for proper alignment, 3/4″ latchbolt throw, and smooth operation throughout the full range of motion. Test device operation to verify proper function and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.Professional Applications Commercial Office Buildings Educational Facilities Healthcare Institutions Retail Establishments Industrial and Warehouse Facilities Multi-Tenant Residential Properties Government and Municipal BuildingsWhy Choose Sargent Quality?Sargent 8200 Series mortise locks deliver professional-grade reliability with patented design and construction rated for 16 million cycles in independent UL testing. The 10-year limited warranty with 2-year electrical component coverage demonstrates the manufacturer’s confidence in long-term performance. Engineered for demanding commercial applications where dependable security and maximum durability are essential.