Kwikset 660.SCAL.SCS Single Cylinder Deadbolt with SCAL Latch and SCS Strike

The 660 ships with an adjustable latch that sets to either 2-3/8 or 2-3/4 inch backset, so it drops into either of the two standard residential door preps without new boring. The latch also carries two interchangeable faceplates, round corner and square corner, so it matches whichever mortise shape is already cut into the door edge. A round strike is included for the jamb.

The 660 is a residential deadbolt, ANSI/BHMA Grade 3. That is fine for a single-family exterior door but it is the lightest of the three grades and it is not what you want on a high-traffic commercial or multi-family entrance. For that, step up to a Grade 1 deadbolt like the Accentra D111 or the Design Hardware D1 Series, or a Grade 2 such as the Arrow DBX61 or Hager 3215.

The bolt throws 1 inch, which is the full standard projection, and a round deadbolt strike comes in the box. If the existing jamb has a rectangular face strike you will want to swap to the included round one or re-cut the jamb mortise, since the supplied strike is round. The 1 inch throw itself will reach into any standard jamb bore.

Key outside, thumbturn inside. It is a single cylinder deadbolt, so there is no keyway on the interior side. That is the right choice for an exterior door with no glass near the lock and it keeps egress simple. If you have a glass panel or sidelite within reach of the bolt and need a key on both sides, look at a double cylinder instead, such as the Hager 3214 or the Dexter DB2000 double cylinder.

The Kwikset 660 is a residential Grade 3 deadbolt with a 1 inch throw. When the opening calls for a fire rated deadbolt, the Hager 3215 is a single cylinder deadbolt with a 1 inch throw at Grade 2 and carries a fire rating, the Hager 3115 is a Grade 2 cylinder x thumbturn deadbolt with a Schlage C keyway and a fire rating, and the Cal-Royal CRB800 is a heavy duty single cylinder deadbolt with a UL 3-hour fire rated latch. All three keep the key outside, turn inside operation while meeting the fire requirement.

The Kwikset 660 is a key outside, thumb turn inside deadbolt certified to ANSI/BHMA Grade 3. For the same cylinder x thumbturn function at Grade 1, the Dexter DB1000-SCT is a Grade 1 single cylinder deadbolt rated for doors 1-3/8 inch to 1-7/8 inch thick, and the Accentra D111 is a Grade 1 single cylinder deadbolt for doors 1-3/8 inch to 1-3/4 inch thick. Both keep the keyed-outside, turn-inside operation while moving up two grade levels in the ANSI cycle and strength testing.

The Kwikset 660 operates by key outside and thumb turn inside at Grade 3. For the same function one grade up, the Dexter DB2000-SCT is a Grade 2 single cylinder deadbolt for doors 1-3/8 inch to 1-3/4 inch thick, the Arrow DBX61 is a Grade 2 single cylinder deadbolt in the DBX Series, and the Cal-Royal CB160 is a Grade 2 single cylinder deadbolt with a tamper-resistant cylinder guard. All three are cylinder x thumbturn, so the door prep concept and the way the occupant uses it stay the same.

The Kwikset 660 is keyed on the outside only, with a thumb turn on the inside, so it cannot be keyed from both faces. For a double cylinder deadbolt, the Dexter DB2000-DCT is Grade 2 for doors 1-3/8 inch to 1-3/4 inch thick, the Dexter DB1000-DCT is Grade 1 for doors 1-3/8 inch to 1-7/8 inch thick, the Hager 3214 is a Grade 2 double cylinder deadbolt with a Schlage C keyway for doors 1-3/8 inch to 1-3/4 inch, and the Design Hardware D1 Series is a Grade 1 extra heavy duty double cylinder deadbolt for 1-3/4 inch doors. Note that double cylinder deadbolts are restricted on egress doors in many jurisdictions, so confirm the local code for the opening before specifying one.

The Kwikset 660 uses a standard turn piece on the interior to throw the bolt. Where the turn needs to be easier to operate, 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 thick. It keeps the same key outside, turn inside arrangement and changes only the shape of the inside turn piece.

The Kwikset 660 is supplied keyed with 2 keys and a fixed cylinder. Where the cylinder has to come from your own keying system, the Deltana CL200LAIC is a Grade 2 single cylinder deadbolt prepped for an interchangeable core with a 2-3/4 inch backset, the Delaney LM Series 301702 is a Grade 1 single cylinder less core deadbolt in dull chrome US26D, and the Arrow E61 26D IC is a Grade 2 single cylinder deadlock with SFIC prep less core for doors 1-3/8 inch to 1-3/4 inch. Those ship without a core so your locksmith installs the facility core.

The Kwikset 660 needs a through bore because it is keyed on the outside face. When there is no outside cylinder to be had, the Arrow E60 is a Grade 2 non-keyed exit deadlock with a blank plate outside and thumbturn inside for doors 1-3/8 inch to 1-3/4 inch thick, and the Callan 205S is a Grade 3 one-sided half-bore deadbolt that does not pass through the door. Both throw a bolt from the inside only.

The Kwikset 660 latch is built for standard door preparations with a 2-3/8 inch to 2-3/4 inch backset. For a thicker slab, the Deltana 7312KA2 is a Grade 3 heavy duty double cylinder deadbolt for doors 1-3/8 inch to 2 inch thick, and the Corbin Russwin DL3011 is a Grade 1 cylindrical deadlock for doors 1-3/4 inch to 2-1/4 inch thick. Measure the slab at the bore and pick from that range.

No. The Kwikset 660 is a bored tubular deadbolt that installs in minutes with just a screwdriver using a standard deadbolt bore and an adjustable 2-3/8 inch to 2-3/4 inch backset latch. The Dormakaba D900 is a small case mortise dead bolt, cylinder x thumbturn, keyed different with SC keyways, and the Emtek 2050 is a European mortise deadbolt with an integrated roller latch. Mortise cases require a pocket routed into the door edge, a different operation entirely from a bored prep.

The 660 comes complete for a standard install: outside cylinder, inside thumbturn, the adjustable SCAL latch with both round and square corner faceplates, the round SCS strike, mounting screws, and two keys. Nothing else is required if the door is already bored for a deadbolt. Install takes a screwdriver, no special tooling.

Each 660 ships as its own keyed unit with two keys. For a rental portfolio the practical approach is to have all the deadbolts rekeyed to one bitting by a locksmith after they arrive, or to standardize on a keyway your existing locks already use. If you need a factory keying system rather than field rekeying, a commercial line is the better fit, for example the Dormakaba D900 mortise deadbolts, which are supplied keyed different on SC keyways, or the Hager 3215, which uses the Schlage C keyway.

A tubular deadbolt like the 660 goes into a standard cross-bore and edge bore, installs in minutes with a screwdriver, and is the normal answer for a residential exterior door. A mortise deadlock needs a pocket cut into the door edge and is used where the door is already mortise prepped or where a commercial grade case is required, like the Dormakaba D900 small case mortise deadbolts or the Emtek 2050 European mortise deadbolt with integrated roller latch. If the door has an existing deadbolt bore, stay tubular.

Staying at Grade 3 with a cylinder by thumbturn function, the closest peers are the Cal-Royal ED500, which also has an adjustable backset and covers 1-3/8 to 1-3/4 inch doors, the Cal-Royal LSD with an ADA ergonomic thumbturn if the interior turn needs to be easier to grip, and the Callan Model 200S in square trim if you want a squared escutcheon instead of round. The Brinks Raleigh and Mendocino deadbolts also use a 4-way adjustable backset.

The Kwikset 660 is a single cylinder deadbolt keyed outside with a thumb turn inside, so the occupant can throw and retract the bolt from the room side without a key. A classroom deadbolt removes that: the Falcon D111 is a Grade 1 heavy duty classroom deadbolt and the Falcon D211 is a Grade 2 medium duty classroom function deadbolt, and the Corbin Russwin DL2211 is a Grade 1 cylindrical deadlock with classroom function, cylinder by blank plate, for 1-3/4 inch doors. Those are specified where the bolt must only be controlled by key, not by anyone standing inside.

No. The Kwikset 660 ships with a round deadbolt strike, the SCS strike, sized for a tubular deadbolt bore. The Arrow 460 is a mortise lock strike with a straight lip covering latchbolt and deadbolt functions on 1-3/4 inch doors, which is the strike for a mortise lock case rather than a bored deadbolt. They are not interchangeable preps.

The Kwikset 660 latch adjusts from 2-3/8 inch to 2-3/4 inch backset to fit standard door preparations. For an adjustable-backset Grade 3 alternative, the Cal-Royal ED500 is a Grade 3 single cylinder deadbolt with adjustable backset for doors 1-3/8 inch to 1-3/4 inch thick, and the Brinks Raleigh E2401 is a single cylinder deadbolt with a 4-way adjustable backset. The adjustable latch on any of these means one part covers both common bore centers without ordering by backset.

The Kwikset 660 is a single cylinder deadbolt with a round deadbolt strike and a latch offering round corner and square corner faceplates. If the visible trim itself has to be square, the Bravura 310SC Elite is a Grade 2 contemporary square deadbolt, cylinder x thumbturn, the Callan 200S is a Grade 3 single cylinder square trim deadbolt, and the Brinks Mendocino E2402 is a contemporary square single cylinder deadbolt with 4-way adjustable backset. All keep the key outside, turn inside function.

The Kwikset 660 is a mechanical deadbolt operated by key outside and thumb turn inside. For code or credential entry on the same opening, the Delaney KP400 is a Grade 2 electronic deadbolt with a programmable remote, the Codelocks CL2200 is a medium duty electronic surface deadbolt in brushed steel, and the Dormakaba Saffire LX-D is an RFID electronic deadbolt with BLE and electronic lock override. These change how the bolt is operated rather than what the bolt does.

The Kwikset 660 latch adjusts 2-3/8 inch to 2-3/4 inch, so it drops into either standard bore center. Some peers are built to a single backset instead: the Accentra D111 is a Grade 1 single cylinder deadbolt with a 2-3/8 inch backset, while the Deltana CL200LA is a Grade 2 single deadbolt with a 2-3/4 inch backset. With a fixed-backset deadbolt you have to measure the existing bore center before ordering.

No. The Kwikset 660 is a complete single cylinder deadbolt supplied with the SCAL latch, the SCS round strike, and 2 keys. The BEST 8T is a T Series tubular deadbolt tube component, which is the bolt mechanism piece of a T Series lock rather than a finished deadbolt with trim and strike. Likewise the Baldwin Reserve 8BR0618001 is a deadbolt spacer, a fitment part, not a lock.

No. The Kwikset 660 is a deadbolt on its own, meant for exterior doors where keyed entry and security is needed, and it is installed alongside whatever handle the door already has. For one assembly that combines both, the Falcon H2101 is a Grade 2 entrance interconnected lock with a single cylinder deadbolt, and the Baldwin Estates 8011 is a 1-5/8 inch double cylinder deadbolt with entrance function. Interconnected locks use a different door prep than a standalone deadbolt bore.

The Kwikset 660 is mechanical: the bolt moves by key outside or turn piece inside, with no electrical connection. Where the bolt has to be released by a controller, the DynaLock 1300 Series is a heavy duty mortise electric deadbolt. That is a wired device cut into the frame or door edge, not a drop-in for a bored deadbolt.

The Kwikset 660 is a residential Grade 3 single cylinder deadbolt in Satin Nickel, Satin Chrome, and Polished Brass, with a Microban treated surface and a 1 inch throw. For standardizing across units, peers carrying the same cylinder x thumbturn function span grade levels: Cal-Royal ED500 at Grade 3, Dexter DB2000-SCT at Grade 2 for doors 1-3/8 inch to 1-3/4 inch, and Dexter DB1000-SCT at Grade 1 for doors 1-3/8 inch to 1-7/8 inch. Picking one family and one finish across the property keeps the keying plan and the stockroom simple.

Three: satin nickel, satin chrome, and polished brass. If you are matching a run of units, satin nickel is the common contemporary pairing, satin chrome reads cooler and closer to a brushed stainless look, and polished brass suits older traditional door furniture. All three cover the same 660 deadbolt with the SCAL latch and SCS strike, so the function does not change with the finish.

Yes, Microban is built into the 660. It is integrated into the finish rather than applied as a coating that wears off, which is why it shows up on specs for healthcare, hospitality, and multi-family touchpoints where the exterior thumb and knob surfaces get handled constantly.

You can, but it is built for exterior doors where keyed entry and security matter. On an interior door you get a bolt that needs a key from the corridor side, which is usually not what anyone wants. If the door only needs a thumbturn and no key at all, a non-keyed deadlock such as the Arrow E60, which is blank plate by thumbturn, is the cleaner fit.