Emtek LC4-PASS M Standard Latch, Passage Function

Yes, it covers 1-3/8 through 1-3/4 inch doors, so it handles both the thinner older interior door and standard 1-3/4 inch stock. Anything thicker than 1-3/4 inches is outside its range. The Deltana DLP23875 drive-in passage/privacy latch runs 1-3/8 to 2 inches if you're dealing with a thicker slab.

A 2-1/8 inch cross bore, which is the standard prep on a residential door drilled for a tubular knob or lever. If your existing door already takes a common passage knob, the hole is almost certainly already there and this latch drops into the same prep. The edge bore takes the latch body at either 2-3/8 or 2-3/4 inches from the door edge to the center of the cross bore.

Passage only, non-keyed. It retracts with the knob or lever from either side and has no locking or privacy function at all, so use it on hall, closet, and pantry doors. If the opening needs to lock, this isn't the part. The Deltana DLP23875 is catalogued as a passage/privacy latch, and the Deltana DLE23875 as an entry latch.

That's exactly what the LC4-PASS M is for. It's a replacement latch for Emtek passage knobsets and leversets, sold on its own, so a seized or snapped latch doesn't cost you the trim. Brass construction, adjustable backset, and it reuses the existing 2-1/8 inch cross bore.

No. The LC4-PASS M is a residential passage latch with no locking function, which rules it out for a unit entry. If you need a UL rated latch, the Kwikset 83521 RCAL plain latch and the Kwikset 84290 square corner plain latch with 2-3/8 inch backset are both UL listed in our line.

The Deltana DLP23875 is the nearest match. It is a drive-in latch with an adjustable backset of 2-3/8 inch or 2-3/4 inch, the same two backset settings the Emtek LC4-PASS M offers, and it is built for passage/privacy service where the Emtek latch is a passage-function tubular latch. Both are non-keyed latches, so the trim on the door supplies the operation. Confirm the bore prep before swapping: the LC4-PASS M is specified for a 2-1/8 inch cross bore and a 1-3/8 inch to 1-3/4 inch door.

A passage latch such as the Emtek LC4-PASS M is the wrong function for a keyed opening; it is non-keyed and carries a passage function. For a keyed entry opening, the Deltana DLE23875 is an adjustable drive-in latch built for entry function. Check the door leaf as well: the DLE23875 is rated for doors 1-3/8 inch to 2 inch thick, while the LC4-PASS M is specified for 1-3/8 inch to 1-3/4 inch.

Two Kwikset options carry a UL 3 hour rating. The 83521 is a plain latch listed for Kwikset BBL, KNL, CNL and PLL trim, and the 83518 is an adjustable square drive UL 3 hour latch. Both are tied to the trim they were built for, so verify what knob or lever is going on the door before ordering. The Emtek LC4-PASS M is a residential passage-function tubular latch with an adjustable 2-3/8 inch or 2-3/4 inch backset.

It's supplied to suit either, with round corner and square corner faceplate options, so it matches the mortise already cut in the door edge. That matters on a replacement: if the old latch left a square-corner pocket, you don't want to chisel the edge to fit a radius plate. Check the existing pocket before you pick.

It's a residential-duty part. Emtek catalogues the LC4-PASS M under residential door hardware, so for apartment interiors, single-family, and light hospitality it's on spec. For commercial corridor and back-of-house traffic, you want a commercial-grade tubular or cylindrical latch instead, not this one.

For a straight latch swap, no, the latch adjusts to both standard backsets and reuses your existing trim and screws. What it does not include is a strike plate. If the strike in the jamb is worn, chewed out, or you're changing the corner style, order that separately so the latch throws cleanly into the frame.

No handing to specify. It's a passage latch with a bevelled latchbolt that retracts from either side, and the bolt can be rotated to suit a left- or right-hand swing, so the same part works on both. Backset is the only fit decision you have to make, 2-3/8 or 2-3/4 inches.

On a standard 2-1/8 inch cross bore with a 2-3/8 or 2-3/4 inch backset, the prep is the same across brands, so the LC4-PASS M goes into the same hole. Two things to check: door thickness has to be 1-3/8 to 1-3/4 inches, and the function has to match. If you're pulling out a keyed entry latch, this passage latch won't lock. The Deltana DLE23875 is the entry-function equivalent.

Treat it as a different part rather than a swap. The Kwikset 84290 is a square corner plainlatch fixed at a 2-3/8 inch backset and carries a UL listing, so it does not cover the 2-3/4 inch setting that the Emtek LC4-PASS M provides as an adjustable backset. The Emtek latch also comes with a round or square corner faceplate, so the faceplate profile is selected to match the existing mortise in the door edge. On a fire-rated opening, the UL-listed Kwikset latch is the one to specify.

The latch is brass, with a brass nose bolt on both backset versions. Brass doesn't rust the way a plated steel latch does, which is why it holds up better in humid baths, laundry rooms, and coastal interiors where a steel latch body starts binding after a few seasons.