Sargent 82-0509 Genuine OEM Deadbolt Spring for 8200 & 7800 Series Mortise Locks

The Sargent 82-0509 is a genuine OEM replacement deadbolt spring engineered specifically for Sargent 8200 Series and 7800 Series mortise locks. When the internal deadbolt spring wears out or loses tension, the deadbolt mechanism may fail to return properly, compromising door security and function. Replacing it with the factory-correct Sargent 82-0509 restores the precise mechanical action that the 8200 and 7800 Series mortise lock hardware was designed to deliver. Because this is a genuine Sargent OEM part — not an aftermarket substitute — fit, form, and function match original factory specifications exactly.

Institutional Grade Features & Benefits

• Genuine OEM Quality: Manufactured by Sargent to factory tolerances, ensuring a precise drop-in fit within the 8200 and 7800 Series mortise lock body without modification or guesswork.
• Restores Deadbolt Function: Replaces a fatigued or broken deadbolt spring, returning the deadbolt mechanism to correct, reliable operation.
• Correct Spring Tension: Designed to deliver the specific tension required by the Sargent mortise lock chassis, preventing under-throw or failure-to-seat conditions in the deadbolt.
• Long-Term Reliability: Purpose-built for commercial and institutional mortise lock applications where consistent, repeatable deadbolt performance is critical.
• Minimizes Downtime: A direct OEM replacement part supports fast, confident servicing of in-field mortise locks — reducing door downtime in commercial, institutional, and high-traffic facilities.
• Wide Series Coverage: Compatible with both the Sargent 8200 Series and Sargent 7800 Series mortise locks, making this a versatile service part for locksmiths and facility maintenance teams managing multiple Sargent mortise lock installations.

Applications

The Sargent 82-0509 deadbolt spring is the correct service part for facility managers, door hardware distributors, and locksmiths maintaining Sargent 8200 Series mortise locks and Sargent 7800 Series mortise locks in commercial offices, educational institutions, healthcare facilities, government buildings, and other high-use environments where mortise lock reliability is essential.

Technical Details