Emtek 8578 Quincy Single Sided Deadbolt - Brass

No cylinder, and no exterior trim at all. The 8578 Quincy is a single sided deadbolt: it throws and retracts from a thumbturn on the inside only, with no keyway and no collar on the other face. That makes it a privacy or interior-security bolt, not an entry lock. If someone needs to key the door from outside, this is the wrong part; a cylinder x thumbturn deadbolt like the Dexter DB2000 single cylinder or the Bravura 310B Elite is what that job takes.

Yes. The 8578 Quincy covers doors from 1-3/8 to 2 inches thick, so a standard 1-3/8 inch interior slab is inside the range. It ships set up for a 1-3/4 inch door, so call out the thickness on the order if yours is thicker than that.

In most cases yes. It's a tubular deadbolt bored for a 2-1/8 inch cross bore and a 1 inch edge bore, which is the standard prep already in nearly every residential door that has a deadbolt in it. Backset is your other check: order it in 2-3/8 or 2-3/4 inch to match the hole you already have. Get the backset wrong and the bolt won't line up with the edge bore.

It's a residential product, and single sided at that. For a leased unit's entry door, a corridor door, or anything on a commercial opening, go to a graded deadbolt instead: the Accentra D111 is Grade 1 cylinder x thumbturn with a 2-3/8 inch backset, and the Cal-Royal CB160 is a Grade 2 single cylinder with a tamper-resistant cylinder guard. The 8578 belongs on interior doors inside a home where nobody needs key access.

It can't be keyed at all. The 8578 has no cylinder and no keyway, so it doesn't enter a keying system. If the goal is putting a door on your existing Schlage C system, look at a keyed deadbolt cut for that keyway, like the Hager 3115 Grade 2 cylinder x thumbturn or the Hager 3215 single cylinder, both of which use the Schlage C keyway.

The Emtek 8578 Quincy is a single sided deadbolt operated by a thumbturn from the inside only, with no cylinder or collar on the outside face. The Callan Model 205S is the direct counterpart in the comparable set: it is a one-sided half-bore deadbolt carrying a Grade 3 rating. Both put the operating hardware entirely on the interior face, so either suits an opening where nothing should show or operate from outside. The Emtek is brass and finished for interior appearance, while the Callan is prepped as a half-bore.

The Arrow E60 is the commercial answer for that opening. It is a Grade 2 exit deadlock with a blank plate by thumbturn function, non-keyed, and fits doors 1-3/8 inch to 1-3/4 inch thick. The Emtek 8578 Quincy is also non-keyed and thumbturn operated, but it is a residential brass deadbolt intended for interior installation and appearance, covering 1-3/8 inch to 2 inch doors. Choose the Arrow where an ANSI grade has to appear on the spec, and the Emtek where the interior finish is what matters.

Step up to a cylinder by thumbturn deadbolt. The Dexter DB2000 single cylinder is Grade 2 and fits doors 1-3/8 inch to 1-3/4 inch, and the Dexter DB1000 single cylinder is Grade 1 across 1-3/8 inch to 1-7/8 inch. The Hager 3215 is another single cylinder option with a 1 inch throw, Grade 2, for 1-3/8 inch to 1-3/4 inch doors. The Emtek 8578 Quincy cannot be converted for this: it ships with no cylinder or collar and turns from the inside only, so an exterior key function means a different lock and a full cross bore both sides.

The Emtek 8578 Quincy is a residential brass deadbolt for interior installation. For an opening where a fire rating has to be documented, the Hager deadbolts carry one: the Hager 3215 and Hager 3115 are Grade 2 cylinder by thumbturn deadbolts with a fire rating and a 1-3/8 inch to 1-3/4 inch door range, the Hager 3118 is the Grade 1 classroom version with a 6-pin Schlage C cylinder, and the Cal-Royal CRB800 is a Grade 1 heavy duty single cylinder deadbolt with a UL 3-hour fire rated latch.

The Emtek 8578 Quincy covers 1-3/8 inch to 2 inch doors as standard, with 1-3/4 inch being the assumed thickness. Above that, the Corbin Russwin DL3011 Grade 1 cylindrical deadlock is built for 1-3/4 inch to 2-1/4 inch doors. Note the function difference: the DL3011 is a cylinder by blank deadlock, keyed from one side with no thumbturn, so it is a swap for the opening thickness rather than for the inside-turn operation the Emtek gives you.

Go to a double cylinder deadbolt, keyed on both faces with no turn to reach. The Dexter DB1000 double cylinder is Grade 1 for 1-3/8 inch to 1-7/8 inch doors and the DB2000 double cylinder is Grade 2 for 1-3/8 inch to 1-3/4 inch. The Deltana 7312KA2 is a Grade 3 double cylinder covering 1-3/8 inch to 2 inch, the same door range the Emtek 8578 Quincy covers. The Emtek itself is thumbturn only from the inside with nothing on the outside face, so it does not address a reach-through opening. Confirm your local egress code before specifying double cylinder.

Backset is a required choice on the 8578, offered in 2-3/8 and 2-3/4 inches. Measure from the door edge to the center of the existing bolt hole, or on a new door to the center of the bore you plan to drill. Shallower doors and older residential slabs usually take 2-3/8; heavier entry-style doors more often run 2-3/4.

Ten, all on a solid brass body: Polished Brass Lifetime (US3), Unlacquered Brass (US3NL), Satin Brass (US4), French Antique (US7), Oil Rubbed Bronze (US10B), Polished Nickel Lifetime (US14), Satin Nickel (US15), Pewter (US15A), Flat Black (US19) and Polished Chrome (US26). For a property manager matching a floor of doors, the unlacquered brass will patina over time while the lifetime finishes hold their appearance.

Nothing mounts on the outside face. The 8578 Quincy is furnished without a cylinder or collar, so the exterior side of the door stays blank. If the look of a bare face bothers you on a door people see from both sides, a one-sided deadbolt with a finish plate, such as the Callan 205S half-bore, covers the outside instead.

Operation from the outside is the whole difference. The 8578 turns only from the inside thumbturn, so it can never be unlocked from the other face. A double cylinder deadbolt like the Deltana 7312KA2 or the Callan 210S takes a key on both sides, which is used on glass-adjacent doors so a broken lite doesn't let someone reach the turn. Where egress speed matters, the thumbturn side of the 8578 is faster to operate than any keyed side.

Two in particular. The BEST 8T is a T Series tubular deadbolt tube component, that is the latch tube alone rather than a complete lock. The Baldwin Reserve 8BR0618001 is a deadbolt spacer for a double cylinder application, a fitting part and not a lock. The Emtek 8578 Quincy is a complete tubular deadbolt with the inside thumbturn, so neither of those is a substitute for it.

The Emtek 8578 Quincy is built around the Schlage C keyway, so keyed deadbolts on the same keyway keep one key across the unit. The Hager 3115 is a Grade 2 cylinder by thumbturn deadbolt with a Schlage C keyway for 1-3/8 inch to 1-3/4 inch doors, and the Hager 3214 is the Grade 2 double cylinder version on the same keyway and door range. Dormakaba D900 small case mortise deadbolts are also supplied keyed different with SC keyways if the opening is mortise prepped rather than bored.

Look at the Grade 1 deadbolts in the set. The Falcon D111 is a Grade 1 heavy duty classroom deadbolt with adjustable backset, the Accentra D111 is a Grade 1 cylinder by thumbturn deadbolt with a 2-3/8 inch backset for 1-3/8 inch to 1-3/4 inch doors, and the Design Hardware D1 Series is an extra heavy duty Grade 1 double cylinder deadbolt for 1-3/4 inch doors. The Emtek 8578 Quincy is a residential brass single sided deadbolt, which is why an institutional spec generally lands on one of these instead.

The Cal-Royal LSD is a Grade 3 single cylinder deadbolt with an ADA ergonomic thumbturn, fitting doors 1-3/8 inch to 1-3/4 inch. It is keyed from the outside as a cylinder by thumbturn lock, where the Emtek 8578 Quincy is non-keyed and turns from the inside only. If you want the larger turn without an exterior key, the Cal-Royal ED500 is a Grade 3 single cylinder deadbolt with adjustable backset over the same door range.

The Codelocks CL200 is a surface mounted deadbolt with key override, light duty, that replaces the turn with a code. If you want an electronic version, the Codelocks CL2200 is an electronic surface deadbolt in a brushed steel finish rated medium duty, and the CL2210 is the electronic mortise deadbolt. The Emtek 8578 Quincy is a mechanical tubular deadbolt with no electronics, bored into the door rather than surface applied, so the Codelocks units change both the operation and the door prep.

Solid brass, both the substrate and the body material. That matters for finish life on the unlacquered and living finishes, where the brass underneath is what develops the patina rather than a coating over pot metal. Styling is Emtek's American Classic look.

They sit in different functions. The Emtek 8578 Quincy is a single sided brass deadbolt in the American Classic style, thumbturn from the inside with no cylinder or collar outside. The Baldwin Estates 8011 is a contemporary 1-5/8 inch double cylinder deadbolt with an entrance function, and the Baldwin Reserve contemporary round and square deadbolts are also double cylinder. Those are keyed on both faces for an exterior entry door, where the Emtek is meant for the inside face of an interior opening.