Schlage Residential FC21 Northbrook Lever Passage/Privacy Cylindrical Lock Grade 2Versatile Residential Lock Solution with Dual Function DesignThe Schlage Residential FC21 Northbrook Lever combines passage and privacy functions in a single Grade 2 cylindrical lock designed for residential applications. This non-keyed lock accommodates door thicknesses from 1-3/8" to 1-3/4" with dual backset options of 2-3/8" or 2-3/4". The lock features ANSI/BHMA A156.2-2017 Grade 2 certification and includes a 1" x 2-1/4" latch with 1/2" throw for reliable operation.Professional Features & BenefitsDual Function Operation: Passage is default function with privacy pushbutton conversion on interior side for versatile room applications.Emergency Access: Can be opened from outside with small emergency unlock tool when in privacy mode for safety and convenience.Grade 2 Certification: ANSI/BHMA A156.2-2017 Grade 2 and ANSI/BHMA A156.39-2015 Residential Grade AAA certified for reliable performance.Universal Installation: Dual backset latches fit either 2-3/8" or 2-3/4" backsets with easy 3-step installation requiring only a screwdriver.Door Compatibility: Accommodates door thicknesses from 1-3/8" to 1-3/4" with non-handed design for flexible installation.Fire Door Ready: Available UL Listed for 90 minute fire door applications when required.Complete Hardware Package: Includes 1" x 2-1/4" latch with 1/4" radius corner faceplate and 1-5/8" x 2-1/4" radius corner full lip strike.Manufacturer Warranty: 10 Year warranty coverage for added confidence and protection.Standard FeaturesCertification:ANSI/BHMA A156.2-2017 Grade 2ANSI/BHMA A156.39-2015 Residential Grade AAAAvailable UL Listed for 90 minute fire doorLatch: 1"x 2-1/4", 1/4" radius corner faceplate, 1" housing diameter, 1/2" throw, circular drive-in included, universal latchStrike: 1-5/8" x 2-1/4" radius corner, full lipBackset: Dual backset latches, fits either 2-3/8" or 2-3/4" backsetsCylinder: 5-Pin, C keyway, keyed alike (KA4)Door Range: 1-3/8" 1-3/4"Keys: Two per lock, 5-pin, C sectionInstallation & OperationReview manufacturer specifications and verify door preparation requirements including door thickness from 1-3/8" to 1-3/4" and backset options of 2-3/8" or 2-3/4".Use manufacturer-provided templates to mark mounting hole locations accurately on door surfaces for the cylindrical lock installation.Prepare door by drilling required holes per manufacturer specifications for the lock body, latch, and strike plate.Install the dual backset latch and secure the cylindrical lock mechanism to door per manufacturer torque specifications.Mount the strike plate on door frame and adjust for proper alignment with the 1/2" throw latch mechanism.Test both passage and privacy functions including emergency unlock capability to verify proper operation and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.Professional ApplicationsResidential Interior DoorsBedroom and Bathroom Privacy ApplicationsHall and Closet Passage FunctionsMulti-Family Housing UnitsAssisted Living FacilitiesStudent Housing and DormitoriesHome Office and Study RoomsWhy Choose Schlage Residential Quality?Schlage Residential FC21 locks deliver professional-grade reliability with stainless steel construction and Grade 2 certification for demanding residential applications. The 10 Year warranty coverage provides added confidence in long-term performance. Engineered with dual function capability and emergency access features, this lock offers the dependable operation essential for modern residential security needs.