Emtek 8550 Regular Single Sided Deadbolt - Brass

No key, and nothing on the outside face at all. The 8550 is a single sided deadbolt operated by a thumbturn from the inside only, with no cylinder and no exterior collar or trim. That makes it an interior-only lock: a door someone needs to unlock from the outside with a key needs a cylinder x thumbturn deadbolt instead, like the Hager 3115.

1-3/8 inch to 2 inch doors, with 1-3/4 inch treated as the standard. If the door is thicker than 1-3/4 inches, the thickness has to be specified when ordering, and there is a Door Thickness field on the order for exactly that. Anything at or under 1-3/4 needs nothing special called out.

It uses the standard tubular deadbolt prep: 2-1/8 inch cross bore through the face, 1 inch edge bore, on either a 2-3/8 or 2-3/4 inch backset. That is the same prep most residential deadbolts use, so on a door already bored for one it goes straight in. The one thing to watch is the outside face: since the 8550 has no exterior cylinder or collar, the old bolt's exterior trim leaves a visible 2-1/8 inch hole on the outside of the door.

Backset is a required choice on the 8550, offered in 2-3/8 inch and 2-3/4 inch. Measure from the edge of the door to the center of the existing bore and match it. Get it wrong and the bolt will not line up with the hole in the door face.

The Emtek 8550 covers up to 2 inches, but only if the thickness is called out on the order, since it ships set up for 1-3/4 inch by default. Most competing deadbolts stop short of that: the Dexter DB2000 and Hager 3115 top out at 1-3/4 inches, and the Dexter DB1000 at 1-7/8. The Deltana 7312KA2 is one of the few that also spans 1-3/8 to 2 inches, though it is a double cylinder lock rather than a single sided one.

The Arrow E60 is the exit deadlock for that opening: Grade 2, blank plate by thumbturn, for doors 1-3/8 inch to 1-3/4 inch, non-keyed. It puts a blank plate on the exterior face where the Emtek 8550 is single sided with no exterior trim at all and no cylinder or collar. Use the Arrow E60 when the outside face needs to be dressed, and the Emtek 8550 when nothing is wanted on the outside.

The Callan Model 205S is the direct counterpart: it is a one-sided half-bore deadbolt, Grade 3, so it bores only the interior face of the door the way the Emtek 8550 does. The Emtek 8550 is a single sided, non-keyed deadbolt with no cylinder or collar, operated by thumbturn from inside only, with a 2-3/8 inch or 2-3/4 inch backset and Brass construction. The Callan carries a stated ANSI grade; the Emtek is a residential brass unit built for interior appearance.

The Emtek 8550 is non-keyed and operated by thumbturn from inside only, so it cannot secure a door that must be unlocked from the exterior. For a keyed exterior in the same Schlage C keyway the Emtek 8550 uses, the Hager 3115 is a cylinder by thumbturn deadbolt with a Schlage C keyway for doors 1-3/8 inch to 1-3/4 inch, and the Hager 3215 is a single cylinder deadbolt with a 1 inch throw. Both are Grade 2.

No. The Emtek 8550 is a residential tubular deadbolt in brass, single sided and non-keyed. Where a Grade 1 rating is called for on the drawing, the Accentra D111 is a Grade 1 single cylinder deadbolt with a 2-3/8 inch backset for doors 1-3/8 inch to 1-3/4 inch, the Delaney LM Series is a Grade 1 single cylinder less core deadbolt, and the Design Hardware D1 Series is a Grade 1 extra heavy duty double cylinder deadbolt for 1-3/4 inch doors.

The Emtek 8550 is a residential single sided deadbolt in brass. Where the opening carries a fire rating requirement, the Hager 3115, 3118, 3214 and 3215 deadbolts are all listed as fire rated for doors 1-3/8 inch to 1-3/4 inch, and the Cal-Royal CRB800 is a heavy duty single cylinder deadbolt with a UL 3-hour fire rated latch.

Interior openings where you want to lock from one side and never need to get in from the other: a home office, a study, a closet or storage room, a door between a garage and a finished space, or the inactive leaf of a pair. It is built for interior installation and appearance. For an exterior entry door, it is the wrong choice, because there is no way to release it from outside.

Ten finishes, 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). If you are matching thumbturns across a house, note that Unlacquered Brass is a living finish that darkens with handling, while the Lifetime finishes hold their appearance.

Emtek's keyed deadbolts run the Schlage C keyway, so they can be keyed alike with Schlage C cylinders. The 8550 itself is the non-keyed version and takes no cylinder at all, so keying does not apply to it. If you want a Schlage C keyed deadbolt to match, the Hager 3115 is also a Schlage C keyway cylinder x thumbturn deadbolt.

Both lock from one side only, but they prep the door differently. The 8550 is a full tubular deadbolt with a 2-1/8 inch cross bore straight through the door face. A half-bore type such as the Callan 205S bores only partway, so the outside face of the door stays blank with no hole to cover. If you are cutting a fresh door and want nothing showing outside, half-bore is the cleaner route; if the door is already bored through for a deadbolt, the 8550 uses that existing prep.

The 8550 is a residential deadbolt with a decorative brass body, built for interior installation and appearance. For commercial openings and higher-traffic multi-family doors, look at graded deadbolts instead: the Accentra D111 and Delaney LM Series are Grade 1 cylinder x thumbturn, and the Arrow DBX61 and Cal-Royal CB160 are Grade 2.

The Emtek 8550 covers 1-3/8 inch to 2 inch doors, with 1-3/4 inch as standard and a door thickness field to specify thicker. Among comparable deadbolts, the Deltana 7312KA2 double cylinder Grade 3 also lists 1-3/8 inch to 2 inch, and the Corbin Russwin DL3011 Grade 1 cylindrical deadlock runs 1-3/4 inch to 2-1/4 inch. Note the Deltana and the Corbin Russwin are keyed units, while the Emtek 8550 is thumbturn only from the inside.

The Cal-Royal LSD is a Grade 3 single cylinder deadbolt with an ADA ergonomic thumbturn for doors 1-3/8 inch to 1-3/4 inch, so it addresses thumbturn grip but is a cylinder by thumbturn lock - it is keyed from the outside face. The Emtek 8550 is single sided and non-keyed with no cylinder or collar, so the two are not interchangeable in door prep or in how the door is secured from outside.

The Emtek 8550 is single sided and non-keyed, so it does not cover a double cylinder requirement. Double cylinder deadbolts in the comparable range include the Baldwin Reserve Contemporary Round and Contemporary Square deadbolts, the Callan Model 210S Grade 3, the Delaney LU Series Grade 2, and the Dexter DB2000 Grade 2 for doors 1-3/8 inch to 1-3/4 inch.

No. The BEST 8T is a T Series tubular deadbolt tube component, meaning the latch mechanism alone rather than a finished lock with trim. The Emtek 8550 is a complete single sided deadbolt in brass with an inside thumbturn, 2-3/8 inch or 2-3/4 inch backset, and a 2-1/8 inch cross bore with 1 inch edge bore.

The Emtek 8550 is ordered with the backset specified as either 2-3/8 inch or 2-3/4 inch. If a single unit that fits either prep is preferred, the Brinks Raleigh Series round and Mendocino Series square single cylinder deadbolts have a 4 way adjustable backset, the Cal-Royal ED500 is a Grade 3 deadbolt with adjustable backset for 1-3/8 inch to 1-3/4 inch doors, and the Falcon D111 is a Grade 1 heavy duty deadbolt with adjustable backset. All four are cylinder by thumbturn rather than single sided.

The Emtek 8550 is built around the Schlage C keyway, though the unit itself ships non-keyed with a thumbturn inside only. For keyed openings on the same keyway, the Hager 3115 cylinder by thumbturn, the Hager 3118 Grade 1 classroom deadbolt with a 6-pin cylinder, and the Hager 3214 double cylinder all list a Schlage C keyway, and the Dormakaba D900 small case mortise deadbolt is keyed different with SC keyways.

The Emtek 8550 is a tubular deadbolt that bores into the door, with a 2-1/8 inch cross bore and 1 inch edge bore, and is operated by thumbturn from the inside with no key. The Codelocks CL200 is a surface deadbolt with key override, light duty, which mounts to the face of the door rather than through a bore. The two require entirely different door prep.

The Emtek 8550 is a mechanical, non-electronic deadbolt. For an electronic opening, the Delaney KP400 is a Grade 2 electronic deadbolt with a programmable remote, the Codelocks CL2210 is an electronic mortise deadbolt, and the Dormakaba Saffire LX-D is an RFID electronic deadbolt with BLE and electronic lock override.

They are not interchangeable. The Baldwin Estates 8011 is a contemporary 1-5/8 inch double cylinder deadbolt in the Estate Series with an entrance function, keyed on both faces. The Emtek 8550 is an American Classic style single sided deadbolt in brass, non-keyed, with a thumbturn on the inside only and no exterior trim.