Sargent 8237 Lnb 3 Grade 1 Classroom Mortise Lock

Product Description

The SARGENT 8237 LNB 3 is a Grade 1 classroom mortise lock designed for commercial and institutional door hardware applications. It features an LN rose with a B lever trim configuration and accepts a conventional cylinder. The unit is field reversible, allowing installation on doors with either hand without special ordering. An ASA strike is included for standard frame preparation. Grade 1 classification indicates the highest ANSI/BHMA performance rating, making this lock appropriate for high-traffic environments such as schools, government buildings, and healthcare facilities.

This mortise lock is intended for classroom security function, where the outside lever is locked or unlocked by key from the exterior while the inside lever remains free egress at all times. It is suited for installation in hollow metal or wood doors that have been prepped for a standard mortise pocket. The Bright Brass finish (finish code 3) provides a traditional appearance consistent with commercial hardware sets. Licensed locksmiths, door hardware specialists, and commercial contractors are the primary installers.

Key Features

• Grade 1 ANSI/BHMA performance rating for high-traffic and institutional use
• Classroom function: outside lever locked by key, inside lever always allows free egress
• Field reversible handing eliminates the need to specify hand at time of order
• LN rose with B lever trim for a clean, commercial aesthetic
• Conventional cylinder prep accepts standard interchangeable core or fixed cylinder
• ASA strike included for compatibility with standard door frame preparations
• Bright Brass finish (finish 3) for traditional commercial appearance

Compatibility

Designed as an OEM-style replacement or new-installation mortise lock for commercial and institutional doors prepared to accept a standard mortise lock body with ASA strike cutout.

Installation Notes

Installation should be performed by a licensed locksmith or qualified commercial door hardware technician familiar with mortise lock preparation and ANSI door prep standards. Verify door hand and backset before installation, even though the unit is field reversible. Ensure the door is secure and the building access control system is appropriately coordinated before removing any existing hardware. Consult local building codes and applicable fire door rating requirements before installing on labeled fire-rated assemblies.