Schlage Commercial L283-064 Spindle & Spring, L0172

The L283-064 is a replacement spindle and spring set for Schlage L Series commercial mortise locks. It's the internal hardware that carries lever rotation through the lock case and returns the lever to horizontal, so it's what you order when a lever on an L Series mortise lock has gone sloppy or droops instead of springing back. It's a service part, not a complete lock, so it goes into an existing L Series mortise case rather than replacing one.

A drooping lever on a Schlage L Series mortise lock is usually the return spring, and the L283-064 spindle and spring set is the part that addresses it. If the lever instead spins freely without retracting the latch, that points at the spindle. Since this kit carries both pieces, it covers either failure on an L Series mortise lock. If the lock in question is a Schlage cylindrical lock (ND, AL, or B Series), this is the wrong part.

No. The L283-064 is a commercial part, built for the Schlage L Series mortise lock line used in commercial and institutional openings. Residential Schlage locks use different internals entirely, so nothing in this kit transfers to them.

Just the internals. The L283-064 is the spindle and spring only, ordered as a single model with no finish or size options to pick, since it lives inside the lock case where nothing shows. Levers, roses, escutcheons, and the mortise case itself are all separate orders.

For L Series mortise locks, the L283-064 is a common service part to keep on the shelf, which is the point of standardizing on one lock line across a facility. Order by the L283-064 designation. It won't cover cylindrical locks or other manufacturers' mortise locks in the same building, so those need their own service parts.