Marks USA MAR295DB 295DB Cylindrical Leverset, Classroom Intruder Function, Crescent Lever, 2-3/4" Backset, 3-Hour Fire Rated

Marks USA 295DB Cylindrical Leverset — Classroom Intruder Function, Crescent Lever, 2-3/4" Backset, Grade 1

The Marks USA 295DB is a heavy-duty cylindrical leverset from the 295 Series, engineered for Classroom Intruder (DB) function and featuring the Crescent lever design with a G3-Less Conventional Cylinder. Built on a chassis with cast retractors on bronze roller bearings, this leverset is rated to exceed BHMA Grade 1 specifications by 300%, surpassing 3.6 million cycles for exceptional long-term reliability. It accommodates a 2-3/4" backset, fits door thicknesses of 1-5/8" to 1-7/8" (with optional K1904 spacer for 1-3/8" doors), and carries a 3-Hour Fire Rating along with ANSI/BHMA and UL Listed certifications.

Key Features

• Exceptional Cycle Durability: Exceeds BHMA Grade 1 specifications by 300% with over 3.6 million cycles, ensuring long-term performance in high-traffic commercial environments.
• Unique Clutch Mechanism: Stainless steel "clutch" disengages levers from the retractor when locked, dramatically reducing wear and abuse and eliminating lever droop for a lower-maintenance solution.
• Bronze Roller Bearings: Cast retractors on bronze roller bearings provide a strong, durable chassis foundation that contributes to the leverset's extended service life.
• Backset & Door Compatibility: Designed for a 2-3/4" backset (also available in 2-3/8"); fits door thicknesses of 1-5/8" to 1-7/8"; use K1904 spacer for 1-3/8" doors.
• Latch Specifications: Latch #1834 with a 1-1/8" x 2-1/4" front, 9/16" throw, and stainless steel nose for reliable latching performance.
• Rose & Strike Details: Thru-bolted roses at 3-7/16" diameter, spring-loaded with 2 #10 thru-bolts; includes Strike #1135, a 4-7/8" ASA curved lip strike.
• Solid Cast Zamac Levers: Crescent lever crafted from solid cast zamac with 1/2" return for a durable, professional-grade finish.
• Cylinder Configuration: Marks "C" keyway, 6-pin cylinder with 2 keys included for secure, reliable operation.
• 3-Hour Fire Rated: Certified for 3-hour fire-rated door assemblies, supporting life-safety compliance in commercial applications.
• Marks Lifetime Mechanical Warranty: Backed by Marks' Lifetime Mechanical Warranty for added confidence and long-term value.

Certifications & Compliance

• ANSI/BHMA Grade 1 — Exceeds by 300% (3.6 million cycles)
• UL Listed
• 3-Hour Fire Rated
• ADA Compliant
• Marks Lifetime Mechanical Warranty

Technical Specifications

• Series: 295 Series
• Product Group: Mechanical Locks
• Product Subgroup: Bored Locksets
• ANSI/BHMA: ANSI/BHMA, UL Listed
• Commercial/Residential: Commercial
• Function Description: Latch retracted by knobs/levers at all times
• ADA Compliant: Yes
• Keyed: No
• ANSI Function: F75
• Product Function: Passage/Hall/Closet
• Latch Type Specification: Deadlocking
• Product Category: Mechanical Locks
• Department: Door Hardware

Typical Applications

• K–12 Educational Facilities Requiring Classroom Intruder Lockdown Function
• Higher Education Campus Buildings
• Commercial Office Buildings
• Healthcare Institutions and Medical Facilities
• Government and Municipal Buildings
• Multi-Tenant Residential and Mixed-Use Properties
• Retail and Hospitality Establishments

Why Marks USA 295DB?

Marks USA 295DB cylindrical leversets are built on a robust chassis featuring cast retractors on bronze roller bearings and a unique stainless steel clutch mechanism that eliminates lever droop and reduces long-term wear. Rated to exceed BHMA Grade 1 by 300% at over 3.6 million cycles and carrying a 3-Hour Fire Rating with UL Listing and ADA compliance, the 295DB delivers professional-grade dependability for demanding commercial and institutional applications where security and longevity are paramount.