Securitron SFP-MM15 Stop Filler Plate

It fills the gap between the MM15 magnetic lock and the door stop so the lock body sits flush and square against the stop when the stop is shallower than the lock needs. It is an installation accessory for the MM15 mag lock, not a lock or a bracket that changes how the lock latches. Without the right filler, the magnet does not seat flat on the armature and holding force suffers.

Only for some. The filler is needed when the door stop is not deep enough to carry the MM15 body on its own, and the 3/8, 1/2, and 5/8 inch options exist because that shortfall varies frame to frame. On a frame with a deep enough stop, no filler is required. Measure the stop before you order rather than assuming a size.

Both finishes are offered on every thickness: clear anodized (CL) and black anodized (BK). Match the plate finish to the MM15 housing so the assembly reads as one piece on the header, since the filler sits in plain view under the lock.

The part number carries both choices. SFP-3/8BKMM15, SFP-1/2BKMM15, and SFP-5/8BKMM15 are the black anodized plates; SFP-3/8CLMM15, SFP-1/2CLMM15, and SFP-5/8CLMM15 are the clear anodized versions. Six combinations total, thickness first, finish code second, MM15 at the end.

No, and usually they will not be. The filler size is set by each frame's stop depth, so a property with mixed frames can take 3/8 inch at some openings and 1/2 or 5/8 inch at others while running the same MM15 lock throughout. Keep the finish consistent across the building, order the thicknesses per opening.