Sargent 4879 26D Mortise Deadbolt Satin Chrome

Product Description

The SARGENT 4879 26D is an exit function mortise deadbolt designed for controlled egress in commercial and institutional door assemblies. The inside turn-only operation means the deadbolt can be thrown or retracted from the interior using a thumbturn, while the exterior has no keyed entry - a configuration suited to doors requiring free exit but restricted entry. The satin chrome finish (26D) provides a low-sheen, corrosion-resistant surface appropriate for high-traffic interior and vestibule applications. Licensed locksmiths, commercial door hardware installers, and facility maintenance technicians are the typical trade professionals who specify and install this component.

This mortise deadbolt is appropriate for commercial, institutional, and light industrial applications where a dedicated lockout-from-outside combined with free egress from inside is required. Typical installations include stairwell doors, utility rooms, server rooms, and interior corridor doors in office buildings, schools, and healthcare facilities. The inside turn-only function makes it well suited to occupancy-controlled spaces where re-entry from the exterior is not permitted without separate access control hardware.

Key Features

• Exit function operation: inside thumbturn controls deadbolt throw; no exterior keyway
• Mortise body design integrates into standard commercial mortise lock prep cutouts
• Satin chrome (26D) finish resists tarnish and wear in high-contact environments
• Inside turn-only configuration supports controlled entry while maintaining free egress
• Suitable for commercial-grade door assemblies in institutional and office environments

Compatibility

Designed as an OEM-style replacement or new-installation mortise deadbolt for commercial door assemblies that accept a standard mortise deadbolt pocket preparation.

Installation Notes

Installation should be performed by a licensed locksmith or qualified commercial door hardware technician familiar with mortise lock prep dimensions and ANSI door hardware standards. Verify the door thickness, backset, and mortise pocket dimensions are compatible before installation. Ensure the door is secured in an open position and all associated access control or alarm circuits are isolated before beginning work. Follow the door manufacturer's template and applicable local building codes governing egress hardware.