American Standard 1.5 gpm/5.7 L/min Pressure-Compensating Vandal-Resistant Aerator With Key - AMS-M922888

It has 55/64 inch (21 mm) female threads, so it screws onto a male-threaded spout tip of that size. That is the common American Standard male spout thread. If your spout tip is male 15/16-27 or a smaller 13/16 inch male thread, this one will not thread on without an adapter.

Yes, and the key is included with the M922888. Vandal-resistant aerators seat inside the spout end and have no flats for pliers, so they only come out with the matching key. Keep it with the maintenance kit, because without it the aerator cannot be serviced.

1.5 gpm (5.7 L/min), and it is pressure compensating, so the flow holds close to that rate as supply pressure varies rather than surging on a high-pressure line. For restrooms being brought down from older 2.2 gpm aerators, this is the usual swap.

In public or high-traffic washrooms, yes. A standard aerator unscrews by hand, which is why they disappear from school, park, and transit restrooms. The M922888 recesses into the spout and needs the supplied key, so it stays put. For a private residence or a guest bath, a standard threaded aerator is easier to clean and costs less to keep on the shelf.

Only on spouts that take 55/64 inch (21 mm) male threads. Where that matches across your lavatory faucets, one aerator part number and one key covers the fleet, all at 1.5 gpm. Kitchen and service sink spouts often use a different thread size, so check those separately before you buy in quantity.

Chrome is the finish offered, part number M922888-0020A. The aerator body sits recessed in the spout tip, so the visible ring is small and reads neutral against most chrome or brushed spouts.