Sargent DL Series Passage Tubular Lock with Coastal Lever Design and 3-Hour Fire RatingProfessional Tubular Lock Solution for Interior ApplicationsThe Sargent DL Series Passage Tubular Lock features the elegant Coastal Lever Series design with accommodating door thicknesses from 1-3/8" to 1-3/4" and adjustable backset from 2-3/8" to 2-3/4". This non-handed tubular lock includes 1/2" latchbolt throw with T-Strike curved lip strike and is UL-cUL fire-rated up to 3 hours with full ADA compliance for professional commercial and high-end residential applications.Professional Features & Benefits Versatile Door Compatibility: Accommodates door thickness from 1-3/8" to 1-3/4" with adjustable backset from 2-3/8" to 2-3/4" for flexible installation options. Fire-Rated Performance: UL-cUL listed for up to 3-hour fire rating applications, meeting stringent commercial building requirements. ADA Compliance: Meets Americans with Disabilities Act requirements and ICC A117.1 standards for accessible design in commercial applications. Non-Handed Design: Universal installation eliminates the need to specify door handing, reducing inventory requirements and installation complexity. Robust Tubular Construction: Tubular design with 1/2" latchbolt throw and T-Strike curved lip strike for reliable latching performance. Coastal Lever Series Styling: Features decorative hardware from the Studio Collection and Coastal Series for high aesthetic appeal in professional environments. Manufacturer Warranty: 1-year limited warranty provides added confidence and protection for professional installations.Technical Specifications Refer to manufacturer documentation for complete technical specifications.Installation & Operation Review manufacturer specifications and verify door preparation requirements including door thickness, stile width, and handing as applicable to this product. Use manufacturer-provided templates to mark mounting hole locations accurately on door and/or frame surfaces. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions. Install all mounting hardware and secure the device to door and frame per manufacturer torque specifications. Adjust operational components for proper alignment, latching, 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 Multi-Tenant Residential Properties High-End Residential Apartments and Condominiums Interior Office and Conference Room Access Hospitality and Hotel ApplicationsWhy Choose Sargent Quality?Sargent DL Series tubular locks deliver professional-grade reliability with UL-cUL fire rating up to 3 hours and comprehensive ADA compliance certification. The 1-year limited warranty and robust tubular construction with 1/2" latchbolt throw ensure dependable performance in demanding commercial and high-end residential applications where both style and function are essential.