Sargent 8255-ET Grade 1 Heavy Duty Single Cylinder Mortise Lock with Office/Entry Function

Sargent 8255-ET Grade 1 Heavy Duty Single Cylinder Mortise Lock with Office/Entry Function

Industry Benchmark Mortise Lock with Maximum Security and Performance

The Sargent 8255-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 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 field reversible handing and integrates with all SARGENT key systems including Degree, Signature, KESO, and XC.

Professional Features & Benefits

• Dimensional Specifications: 2 3/4" backset with 1 3/4" door thickness compatibility and 3/4" latchbolt throw for secure, reliable operation in commercial applications.
• Heavy-Duty Durability: Patented design and construction with robust components rated for 16 million cycles per UL Cycle Above and Beyond test (Verification ID: V584148) for exceptional longevity in high-traffic environments.
• Grade 1 Performance: ANSI/BHMA A156.13 Series 1000 Operational Grade 1 certification ensures maximum security and reliability for demanding commercial applications.
• Fire Rating Compliance: UL 10C fire-rated up to 3 hours with NFPA 80 compliance for critical fire safety applications in commercial buildings.
• Universal Key System Integration: Compatible with all SARGENT key systems including Degree, Signature, KESO, and XC for flexible master keying and security management.
• Field Reversible Design: Handing can be changed on-site for installation flexibility and reduced inventory requirements.
• Multi-Functional Capability: Available in 56 different functions including electromechanical, security and monitoring options with EcoFlex technology providing up to 89% energy savings.
• Manufacturer Warranty: 10-year limited warranty with 2-year coverage on electrical components for long-term reliability assurance and added confidence.

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 product.
2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces.
3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions.
4. Install all mounting hardware and secure the device to door and frame per manufacturer torque specifications.
5. Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion.
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 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 provides added confidence for demanding commercial applications. Engineered with multiple certifications including UL 10C 3-hour fire rating and Grade 1 performance standards, this lock represents dependable security performance where maximum durability is essential.