Emtek 8166 Delaware 3-5/8" C-to-C Keyed Sideplate Lockset, Passage/Double Keyed - Brass Tubular

Yes. The 8166 is a double cylinder entry lockset, so it is keyed inside and out with no thumbturn. That is what people want on a door with glass beside or in it, since there is no reachable turn to grab. It also means no key-free egress from inside, so check what your local code allows on a bedroom or main egress door before you commit.

3-5/8 inches center to center between the knob or lever and the key cylinder. That figure decides whether it lands on an existing two-hole sideplate prep, so measure hole center to hole center on the door before ordering.

Handing is required on every order, right hand or left hand. It matters most with a lever, since a lever has to sweep down toward the latch side, but the sideplate itself is oriented too. Stand outside the door: if the hinges are on your right it is right hand, hinges on your left is left hand.

Yes. Keying is a required choice at order time, keyed different or keyed alike, and you can also supply a key code if the doors have to work an existing key system. Order the whole group of doors together on the same keyed alike selection so one key runs the set.

The Omnia D12036AC is a double cylinder deadbolt lever lockset with solid brass construction and a sideplate design, which puts it in the same double cylinder keyed sideplate territory as the Emtek 8166 Delaware. The 8166 is a brass tubular entry lockset with a double cylinder keyed function and 3-5/8 inch center-to-center spacing, ordered with any Emtek brass knob or lever style, a 2-3/8 or 2-3/4 inch backset, and handing specified for leversets. The Omnia is built around a deadbolt rather than a tubular latch, so confirm the door prep matches before swapping one for the other.

When the egress side cannot take a keyed cylinder, a single cylinder unit is the one to specify: the Omnia D12036A is a single cylinder deadbolt lever lockset in solid brass. The Emtek 8166 Delaware is a double cylinder keyed entry set, meaning a key is required from both sides, which is what many egress and life-safety requirements rule out. Confirm the requirement with the authority having jurisdiction for the facility type before ordering either one.

It ships as a complete set: the knob or lever you select, the latch, and the strike plate. No separate latch or strike purchase. The latch faceplate comes round corner or square corner so it matches the mortise already cut in the door edge.

Any brass knob or lever style in the Emtek line can be ordered on it, and inside trim is a required selection. That covers the crystal knobs (Bristol, Windsor, Georgetown, Old Town), the classic knobs (Providence, Waverly, Melon, Egg), and the full lever range from Rope and Ribbon and Reed through Milano, Cortina, Athena and Hercules. Pick a lever and you must supply handing.

The 8166 is brass, both material and substrate, in Emtek's Brass collection with an American Classic look. It is a residential-grade tubular lockset, so it belongs on apartment and house entry doors rather than a high-cycle commercial opening. For a leasing office or a storefront-adjacent door, spec a commercial bored or mortise lock instead.

A sideplate lockset like the Delaware 8166 puts the handle and the cylinder on one continuous plate, so it is a single unified escutcheon on the door face instead of two separate rosettes. It uses one 2-1/8 inch bore. Separate knob plus deadbolt gives you two independent locks and lets you mix a thumbturn inside; the sideplate route gives you the matched look and, on the 8166, key control from both sides.

No. The D12036PD is a double dummy, meaning it does not latch or lock at all, it is trim for a door held shut some other way. For a keyed entry with a sideplate you want the Emtek 8166 Delaware, double cylinder on both faces, or the Omnia D12036AC.

For an inactive leaf or a false door that only needs the appearance of hardware, the Omnia D12036PD is a solid brass dummy deadbolt lever lockset with plates at 5-1/2 inch center to center. The Emtek 8166 Delaware is the opposite case - a keyed entry set with a double cylinder function, an operating tubular latch, and a strike plate included. Note the plate spacing differs: the 8166 is 3-5/8 inch center-to-center against the Omnia dummy at 5-1/2 inch, so the two will not sit over the same existing plate footprint.

Not without checking the plate layout. The Emtek 8166 Delaware runs 3-5/8 inch center-to-center and preps with one standard 2-1/8 inch cross bore, an adjustable 2-3/8 or 2-3/4 inch backset, and a door thickness range of 1-3/8 to 1-3/4 inch. The Omnia D12036PD plates are 5-1/2 inch center to center, so the fastener and bore positions do not line up with the Emtek spacing. Measure the existing plate spacing on the door before committing to either.

Eight: Polished Brass Lifetime (US3), Unlacquered Brass (US3NL), Oil Rubbed Bronze (US10B), Satin Nickel (US15), Pewter (US15A), Flat Black (US19), Polished Chrome (US26) and French Antique (US7). Unlacquered brass is the one to pick if you want it to patina rather than hold its shine, and the lifetime polished brass is the one that will not.

The two Omnia units differ by cylinder count: the D12036A is a single cylinder deadbolt lever lockset in solid brass, and the D12036AC is the double cylinder version with a sideplate design. The Emtek 8166 Delaware matches the D12036AC on function, since it is a keyed entry sideplate lockset with a double cylinder keyed function in brass. Pick by which side of the door has to take a key.