Schlage Commercial 36-083 Mortise Cylinder Compression Ring and Spring

The 36-083 is the compression ring and spring that sits behind a mortise cylinder in a Schlage commercial mortise lock. The spring loads the cylinder against the ring so the cylinder stays tight in the face of the lock and does not back out or rattle as it is turned. It is a replacement part, not a cylinder and not a lock, so it does not key anything on its own. If a cylinder is spinning loose in the door or sitting proud of the escutcheon, this is the part that is usually missing or fatigued.

Yes. Schlage lists the 36-083 compression ring and spring as compatible with the B250 and B500 Series. Those are the locks it is specified for, so if you are servicing a mortise cylinder in one of those, this is the correct ring and spring. For any other Schlage series, match the part to the parts breakdown for that lock rather than assuming this one carries over.

Yes, order it to match. Schlage parts of this kind are finish specific, and the 36-083 comes in ten finishes: 605 bright brass, 606 satin brass, 609 antique brass, 612 satin bronze, 613 oil rubbed bronze, 619 satin nickel, 622 matte black, 625 bright chrome, 626 satin chrome, and 643E aged bronze. Pick the number stamped or specified on the lock you are repairing. The ring is the visible edge around the cylinder, so a mismatch shows on the door.

Separately. The 36-083 is the compression ring and spring only. If the cylinder itself is worn, damaged, or you are rekeying to a different keyway, you need a mortise cylinder as its own line item. Buyers replacing a B250 or B500 cylinder typically order both at once, since the ring and spring are cheap to replace while the lock is open and are often the reason the old cylinder felt loose.

Usually, yes. In a Schlage mortise application the compression ring and spring are what hold the cylinder seated and under tension; when the spring loses its set or the ring is lost during a previous service call, the cylinder works loose and the key starts to feel sloppy. On a B250 or B500 Series lock the 36-083 is the part that restores that tension. If the cylinder still moves after replacing it, the problem is the cylinder threads or the lock body, not the ring.

It is a Schlage Commercial part. The 36-083 is built for the commercial B250 and B500 Series, and that is what it should be specified against. For a facility standardizing on those series, keeping a few of these on the shelf in your building finish means a loose cylinder is a five minute fix rather than a lock order.