Sargent 8256-ET Office & Inner Entry Mortise Lock with Heavy Duty Single Cylinder and Grade 1 Rating

Sargent 8256-ET Grade 1 Heavy Duty Single Cylinder Mortise Lock with 2 3/4" Backset

Industry Benchmark Mortise Lock with Maximum Security and Performance

The Sargent 8256-ET 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 mortise lock features a 2 3/4" backset, 1 3/4" door thickness compatibility, and 3/4" latchbolt throw for reliable operation. The multi-functional lock body accommodates a variety of lever and escutcheon styles while maintaining UL 10C fire rating up to 3 hours and ANSI/BHMA A156.13 Series 1000 compliance.

Professional Features & Benefits

• Heavy-Duty Construction: Multi-functional lock body with patented design exceeds industry standards for strength and reliability in demanding commercial applications.
• Exceptional Durability: UL Cycle Above and Beyond test completed at 16 million cycles for long-term performance in high-traffic environments.
• Precise Dimensions: 2 3/4" backset with 1 3/4" door thickness compatibility and 3/4" latchbolt throw for reliable operation and proper fit.
• Fire-Rated Performance: UL 10C positive pressure certified and UL-cUL Fire-Rated up to 3 hours for life safety compliance in commercial buildings.
• Universal Key System Integration: Compatible with all SARGENT key systems including Degree, Signature, KESO, and XC for flexible security management.
• Field Reversible Configuration: Standard 2 3/4" backset with field reversible handing reduces inventory requirements and simplifies installation.
• EcoFlex Technology: Electromechanical versions operate from 12 to 24VDC with EcoFlex technology reducing power consumption up to 96% for energy-efficient operation.
• 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

1. Review manufacturer specifications and verify door preparation requirements including 1 3/4" door thickness, 2 3/4" backset, and handing as applicable to this mortise lock.
2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for proper mortise preparation.
3. Prepare door and frame by drilling required holes and routing mortise cavity as specified in manufacturer instructions for lock body installation.
4. Install all mounting hardware and secure the lock body to door and strike to frame per manufacturer torque specifications.
5. Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion with 3/4" latchbolt throw.
6. 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 Buildings

Why Choose Sargent Quality?

Sargent 8200 Series mortise locks deliver professional-grade reliability with patented design and construction rated for 16 million cycles in 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 fire safety compliance are essential.