Pamex DD01-K180UL 5-1/2" High Door Knocker with UL 180 Degree Viewer

It adjusts from 1 inch up to 1-7/8 inches, so it covers standard 1-3/8 inch interior and 1-3/4 inch entry doors, plus thinner 1 inch slabs. Anything over 1-7/8 inches is out of range and the barrel won't thread together.

The knocker with viewer carries a 20 minute UL rating, so it can go in a 20 minute rated door assembly. For a 45, 60, or 90 minute rated opening it is not the right part.

The Delaney 6 inch Door Knocker with 160 Degree Viewer, DLY-4001, is the nearest match in form: a one-piece knocker with an integrated door viewer, the same combination the Pamex DD01-K180UL provides. The two differ in plate height and optic. The Pamex measures 2-1/2 inches by 5-1/2 inches overall with a 180 degree viewing angle, while the Delaney 4001 is a 6 inch knocker with a 160 degree viewer. For a property manager matching a run of entry doors, the Delaney sits about half an inch taller on the face, which matters when it has to cover the paint shadow left by the unit coming off.

Use the Delaney 4 inch Door Knocker with 160 Degree Viewer, DLY-400x10. Its 4 inch series height gives back roughly an inch and a half of vertical face compared with the 5-1/2 inch overall height of the Pamex DD01-K180UL, which is what decides the job on a narrow stile door or an aluminum entry where the flat area between glazing stop and edge is limited. The tradeoff is the optic: the Delaney 400x10 views at 160 degrees, the Pamex at 180 degrees.

Specify the Pamex DD01-K180UL. It is 20 minutes UL rated, and the viewer barrel is adjustable from 1 inch to 1-7/8 inches so a single part covers the door thicknesses found on multi-family corridor and unit entries. The Delaney comparables, DLY-4001 at 6 inches and DLY-400x10 at 4 inches, are knocker and viewer combinations selected on plate height and a 160 degree optic. For an MRO or institutional buyer standardizing across a building where the entry doors are part of a rated assembly, the UL rating is the deciding line, not the plate size.

Projection is 1-1/8 inches off the face, and the plate covers 2-1/2 x 5-1/2 inches. That matters on a door with a storm door or screen in front of it: measure the gap between the two slabs before ordering, because a knocker standing 1-1/8 inches proud can foul a tight storm door.

Five: 622 matte black, 625 polished chrome, 613 oil rubbed bronze, 605 bright brass, and 619 satin nickel. Those are BHMA finish codes, so if you're matching existing entry sets across a building you can order to the same code rather than eyeballing it. The body is brass underneath.

Pamex classes the DD01-K180UL as residential hardware. It is a good fit for apartment and condo unit entry doors, single family, and multi-family unit doors where a knocker plus viewer is wanted in one prep. For a high-traffic commercial storefront or institutional corridor, spec commercial-rated door hardware instead.

They are two distinct parts separated by plate height. DLY-4001 is the 6 inch door knocker series and DLY-400x10 is the 4 inch door knocker series, and both carry a 160 degree viewer. A distributor ordering against a callout has to hold the height, because the part numbers are not interchangeable on an existing bore pattern once the knocker is fastened. The Pamex DD01-K180UL is a third identity again, a 2-1/2 by 5-1/2 inch brass unit with a 180 degree viewer that fits a 9/16 inch hole.

Not without leaving work behind. The DD01-K180UL is a combination unit, a knocker with the viewer built into the plate, so pulling it for a bare peephole removes the knocker from the door as well. The substitutes that swap one for one are the other knocker and viewer combinations, the Delaney 6 inch DLY-4001 and the Delaney 4 inch DLY-400x10, both with a 160 degree viewer. A viewer alone also will not cover the 2-1/2 by 5-1/2 inch footprint the Pamex plate leaves on a repainted door face.

That is the point of it. Knocker and viewer are one unit on a single 2-1/2 x 5-1/2 inch plate through a 9/16 inch bore, so you drill and finish one hole per door instead of two. On a turn of unit doors that is meaningfully less labor, and the plate covers the old knocker screw holes if they fall inside its footprint.

No handing. The knocker with viewer mounts through the door face on the centerline of the bore, so left hand and right hand doors take the same part. Order by finish and door thickness only.