Schlage A Series A301-387 - Spindle and Catch, Outside (except A25, A43)

The A301-387 outside spindle and catch covers the Schlage A Series knobset range with two exceptions: the A25 and the A43. If your lock is either of those two functions, this is the wrong part. For every other A Series function, check the function code stamped on the lock or on the original order paperwork, then order this one.

That symptom is the spindle, and the A301-387 is the outside spindle and catch for the A Series. The spindle is what carries the turn of the knob back to the latch retractor, and the catch is what retains the knob on the shaft, so a knob that spins free or pulls off is usually one or both of those. One thing to settle first: this part serves the outside of the lock. If the fault is on the inside knob, you need the inside spindle instead.

Schlage builds many A Series service parts to a specific finish, so order against the finish of the lockset you're servicing rather than assuming one part number covers the whole range. If you're keeping a building's openings uniform, pull the finish off the existing lock before you order the A301-387 rather than after it arrives.

Genuine Schlage, certified as a factory service part rather than an aftermarket copy, and the A Series it belongs to is Schlage's commercial knob line. For an MRO or facilities buyer standardizing on A Series across a site, that means the repair goes back to the same hardware that was originally installed rather than a substitute part with its own tolerances.

Yes, spindle and catch failures are a parts-level repair on the A Series. Schlage supplies the outside spindle and catch as the A301-387, so a knob that spins free or won't stay on the shaft can be put right without pulling the lock body, the cylinder, or the trim off the door. That keeps the existing keying and finish in place, which matters when the opening is one of many keyed alike across a building.