Sargent 77-4251 Escutcheon Screw — Genuine OEM Replacement for 8200 & 7800 Series Mortise Locks

The Sargent 77-4251 Escutcheon Screw is a genuine OEM replacement fastener designed specifically for Sargent 8200 Series and 7800 Series mortise locks. Sourced directly from Sargent, this screw ensures an exact, factory-spec fit — eliminating the guesswork and fitment concerns that come with aftermarket alternatives. Whether you are performing routine maintenance, restoring a mortise lock to full working order, or replacing a lost or damaged fastener, the 77-4251 delivers the precision and reliability your commercial or institutional door hardware demands.

Institutional Grade Features & Benefits

• Genuine OEM Part: Manufactured by Sargent to original factory specifications, ensuring a precise fit and long-term reliability within the 8200 and 7800 Series mortise lock assemblies.
• Exact Replacement Fastener: Engineered as a direct drop-in replacement screw for the escutcheon assembly, restoring the mortise lock to proper factory configuration without modification.
• Preserves Lock Integrity: Using the correct OEM screw maintains the structural and aesthetic integrity of the escutcheon plate, preventing loosening, misalignment, or cosmetic damage over time.
• Broad Series Compatibility: Confirmed compatible with the Sargent 8200 Series and 7800 Series mortise lock product lines — two of Sargent's most widely specified commercial lock series.
• Minimizes Downtime: Having the correct replacement part on hand allows facility maintenance teams, locksmiths, and door hardware professionals to complete repairs quickly and efficiently.
• Trusted Sargent Quality: Sargent Manufacturing is a long-established, industry-respected brand in commercial door hardware, and every OEM component reflects the same quality standards as the original lock assembly.

About the Sargent 8200 & 7800 Series Mortise Locks

The Sargent 8200 Series and 7800 Series are heavy-duty commercial mortise locks widely specified for offices, healthcare facilities, educational institutions, hospitality properties, and government buildings. Mortise locks are installed within a pocket (mortise) cut into the door edge, providing superior strength and durability compared to cylindrical locksets. Keeping every component — including escutcheon fasteners — in factory-spec condition is essential to maintaining proper lock function, door security, and code compliance.

Technical Details