Adams Rite 1877 Cylinder-Operated Flushbolt for Paired Wood DoorsProfessional Key-Controlled Security for Inactive Door LeavesThe Adams Rite 1877 Cylinder-Operated Flushbolt provides enhanced key control for the inactive leaf of paired wood doors, preventing unauthorized locking by casual users. This professional-grade flushbolt features a 1-1/4" backset, 3/8" hexagonal stainless steel bolt with 11/16" throw, and accepts standard 1" mortise cylinders. The steel case with corrosion-resistant plating measures 1" x 6" x 1-29/32" and includes a 2-1/4" x 15/16" strike for complete installation.Professional Features & BenefitsSpecifically engineered for narrow stile aluminum doorsHollow metal and wood door options availableAccepts standard Adams Rite MS cam mortise cylindersMultiple finish options: US3, US4, US10B, US32, US32DUL Listed models availableCompatible with Adams Rite electric strikes for access controlAn ASSA ABLOY Group brandTechnical SpecificationsFor complete technical specifications, contact Adams Rite at 1-800-626-7590 or visit adamsrite.com.Installation & OperationReview manufacturer specifications and verify door preparation requirements including door thickness and proper clearances for the 1" x 6" x 1-29/32" case dimensions.Use manufacturer-provided templates to mark mounting hole locations accurately on the inactive door leaf for both flushbolt and strike positions.Prepare door by routing the required mortise cavity and drilling holes as specified in manufacturer instructions for the case and actuator arm.Install the flushbolt mechanism and secure with provided mounting screws, ensuring proper alignment of the actuator arm and rod/bolt assembly.Install the strike plate at threshold or header position and mount the armored faceplate in the selected finish option.Test operation with cylinder installed to verify proper 360 key operation, bolt throw and retraction, and key removal function in locked/unlocked positions. Refer to manufacturer documentation for complete installation details and troubleshooting.Professional ApplicationsCommercial Office BuildingsEducational FacilitiesHealthcare InstitutionsGovernment and Municipal BuildingsMulti-Tenant Residential PropertiesIndustrial and Warehouse FacilitiesRetail EstablishmentsWhy Choose Adams Rite Quality?Adams Rite 1877 flushbolts deliver professional-grade reliability with steel construction and corrosion-resistant plating engineered for demanding commercial applications. The over-center action mechanism provides the same dependable operation found in MS pivoted bolt deadlocks, ensuring consistent performance in high-security installations. Backed by a 5 Year warranty, this cylinder-operated flushbolt offers the key control and unauthorized access prevention essential for professional door security systems.