Sargent 78-0007 Genuine OEM Replacement Latch for 8200 & 7800 Series Mortise Locks

The Sargent 78-0007 is a genuine OEM replacement latch designed specifically for Sargent 8200 Series and 7800 Series mortise locks. When an original latch component wears, sticks, or fails, this factory-spec part restores your mortise lock to full manufacturer-standard performance — no modifications, no guesswork, and no compatibility compromises. Sourced directly from Sargent, the 78-0007 ensures a precise fit and reliable operation for facilities managers, locksmiths, and maintenance professionals who depend on institutional-grade hardware.

Institutional Grade Features & Benefits

• Genuine OEM Part: Manufactured by Sargent to original factory specifications, ensuring exact dimensional fit and function within compatible mortise lock bodies.
• Broad Series Compatibility: Designed to work with the Sargent 8200 Series and 7800 Series mortise locks — two of the most widely installed commercial mortise lock lines in institutional and commercial buildings.
• Reliable Replacement: Restores proper latch engagement and door latching function, helping maintain building security and code-compliant door operation.
• Reduces Downtime: Drop-in OEM replacement minimizes labor time and eliminates the need for field modifications during scheduled or emergency maintenance.
• Commercial & Institutional Grade: Built to withstand the high-cycle demands of schools, healthcare facilities, government buildings, office complexes, and other heavy-traffic commercial environments.

About the Sargent 8200 & 7800 Series Mortise Lock

The Sargent 8200 Series mortise lock is a heavy-duty, ANSI/BHMA-compliant commercial mortise lock line trusted in institutional applications nationwide. Mortise locks are installed within a pocket (mortise) cut into the door edge and offer superior durability and security compared to cylindrical locksets. The 7800 Series is a companion line sharing compatible internal components. Keeping an inventory of OEM replacement parts like the 78-0007 latch is a best practice for facilities maintenance programs managing large door hardware inventories.

Technical Details