Sargent 8237 Lnb 26D Classroom Mortise Lock Satin Chrome

Product Description

The SARGENT 8237 LNB 26D is a Grade 1 classroom mortise lock designed for commercial and institutional door hardware applications. It features the B lever handle paired with the LN rose, a conventional cylinder, and an ASA strike plate. The satin chrome (26D) finish provides a clean, low-glare appearance suited to institutional environments. This lock is field reversible, meaning it can be adapted for both left-hand and right-hand doors without special-order components. Grade 1 designation reflects the highest performance classification under ANSI/BHMA standards, making it appropriate for high-traffic applications where durability and security are required.

This lock is intended for classroom security applications in schools, universities, and similar institutional settings. The classroom function allows the lever to remain locked from the outside by key while remaining freely operable from the inside at all times - a critical feature for lockdown scenarios. Licensed commercial door hardware technicians and locksmiths are the primary installers. The ASA strike is compatible with standard mortise door prep, making it straightforward to install in new construction or as a replacement in existing commercial hollow metal or wood doors.

Key Features

• Grade 1 ANSI/BHMA performance rating for high-traffic commercial and institutional use
• Classroom lock function - outside lever locked by key, inside lever always free
• Field reversible design accommodates left-hand and right-hand door swings without special components
• B lever with LN rose configuration for a clean, institutional profile
• Conventional cylinder for standard key operation
• ASA strike plate included for standard mortise door prep compatibility
• Satin chrome (26D) finish for a durable, low-glare appearance

Compatibility

Designed as an OEM-style Grade 1 mortise lock for commercial and institutional door hardware applications requiring a classroom security function with standard ASA strike prep.

Installation Notes

Installation should be performed by a licensed locksmith or qualified commercial door hardware technician. Confirm door hand and door prep dimensions before installation, as mortise pockets must match the lock body dimensions precisely. Verify that the door thickness and backset align with the specified lock body and trim configuration before drilling or cutting. Follow applicable building and fire code requirements, including IBC and local accessibility standards, when specifying hardware for egress doors.