Kwikset KWI-663SQT-DS One Sided Turn Square Deadbolt with RCAL Latch and Dual RCS and 5303 Full Lip Strike K3

The Kwikset 663 SQT is thumb turn only, with no trim, no keyway, and nothing at all on the exterior face. It suits doors where the outside face has no bore, or where you want to blank off an existing one, but it also means nobody gets in from outside once it is thrown. Common on interior doors, storage rooms, garage-to-house doors, and back doors that are never used as an entry.

Both. The RCAL latch supplied with the 663 SQT deadbolt is adjustable between 2-3/8 and 2-3/4 inch backset, so it drops into either of the two standard residential door preps without ordering a specific backset. Set it at the door before you fit the bolt.

One inch throw on the deadbolt, which is what lets it reach past the gap and well into the jamb rather than just catching the edge of the strike. A 1 inch throw needs a strike box or mortise pocket deep enough to take it; the 5303 full lip strike is included, so if you are replacing a shallow round strike, swap it out and deepen the pocket rather than leaving the bolt short-thrown.

It is a residential deadbolt, and the exterior side is blank, so it is the wrong choice for a commercial opening or any door that has to be keyed from outside. For a commercial-duty deadbolt, look at the Hager 3215 Grade 2 single cylinder with a 1 inch throw, or the Design Hardware D1 Series Grade 1 for extra heavy duty use. Both take a key on the outside, which the 663 does not.

A single cylinder deadbolt is key outside, thumb turn inside. The 663 SQT drops the key side entirely: turn piece inside, blank outside. Pick the one sided version when the door never needs to be unlocked from the far side, and a single cylinder such as the Arrow DBX61 Grade 2 or the Dexter DB2000 when someone has to key in. If you want the blank exterior but a commercial-style deadlock, the Arrow E60 is a blank plate by thumbturn version.

No. The 663 SQT is a full through-bore deadbolt: blank on the outside face, but the body still passes through the door. For a genuine half-bore install where the outside face is never drilled, the Callan Model 205S is a one sided half-bore deadbolt. Worth settling before you cut a door.

The Kwikset 663 SQT operates by thumb turn on the interior with no trim on the exterior, and its latch adjusts from 2-3/8 inch to 2-3/4 inch backset with a 1 inch throw. The Arrow E60 is the commercial counterpart to that arrangement: it is a Grade 2 exit deadlock with a blank plate on the outside and thumbturn on the inside, fitting doors 1-3/8 inch to 1-3/4 inch thick. The Callan 205S is another one sided option, a Grade 3 one-sided deadbolt built for a half-bore door prep, which matters when the exterior face has no through bore at all. Choose the E60 where the opening is a commercial exit door and the 205S where the door is prepped single sided.

The Kwikset 663 SQT has no exterior trim, so there is no way to operate it from outside the door. For an opening that needs outside key access, the Bravura 310SC Elite is the nearest match in square contemporary trim, a Grade 2 cylinder x thumbturn deadbolt, and the Bravura 310RC Elite is the same Grade 2 cylinder x thumbturn in round trim. The Brinks Mendocino E2402 is another contemporary square single cylinder deadbolt and includes a 4 way adjustable backset like the Kwikset latch. All three keep the thumbturn on the inside and add a keyed cylinder on the exterior face.

It ships with the 5303 full lip strike plus a round deadbolt strike, so the jamb hardware is in the box. The full lip strike is the one you want when the bolt needs a lip carried across the jamb face; the round strike drops into a bored jamb hole. Nothing else to buy on the frame side.

If the door is already bored for a deadbolt, yes, it goes on with a screwdriver alone. There is no cylinder to key, no exterior plate to align, and the latch backset adjusts by hand between 2-3/8 and 2-3/4 inch. On a fresh door you still need the 1 inch and 2-1/8 inch bores and a latch mortise cut first.

That is one of the cleaner uses for it. The door prep is standard, the latch adjusts to whichever backset the old bolt used (2-3/8 or 2-3/4 inch), and the exterior side comes out with no plate or keyway showing. Property managers use this on rear exits and utility doors when they want to stop key access from outside without patching a hole in the door.

It is not the same function. The Arrow E61 is a Grade 2 single cylinder deadlock with SFIC prep supplied less core, fitting doors 1-3/8 inch to 1-3/4 inch, so it is keyed from the outside and expects an interchangeable core to be added. The Kwikset 663 SQT is operated by a turn piece on the interior only, with no trim on the exterior and no cylinder to key. Specify the E61 when the facility keys to an SFIC system, and the 663 SQT when the door is to be secured from the inside only.

The Kwikset 663 SQT latch adjusts for standard door preparations at 2-3/8 inch and 2-3/4 inch backsets. For thicker doors, the Deltana 7312KA2 is a Grade 3 double cylinder deadbolt covering 1-3/8 inch to 2 inch doors, and the Corbin Russwin DL3011 is a Grade 1 cylindrical deadlock covering 1-3/4 inch to 2-1/4 inch. The Dexter DB1000 single cylinder is a Grade 1 unit covering 1-3/8 inch to 1-7/8 inch for doors just over the common range.

To keep one trim shape across a run of doors, the square profile options are the Bravura 310SC Elite, a Grade 2 contemporary square cylinder x thumbturn, the Callan 200S, a Grade 3 single cylinder square trim deadbolt, and the Baldwin Reserve DC.CSD, a double cylinder contemporary square deadbolt for openings where a key is wanted on both faces. The Kwikset 663 SQT covers the inside-only doors in Satin Nickel, Bright Chrome, Satin Chrome and Matte Black.

The Baldwin Reserve DC.CRD and DC.CSD are double cylinder deadbolts, keyed on both faces, in contemporary round and square trim respectively. The Kwikset 663 SQT is turned by hand on the interior and has no exterior trim, so it needs no key to release from inside. Double cylinder units require a key to exit, which is a life safety consideration on any door in an egress path; the Callan 210S is a further Grade 3 double cylinder option if that function is what the opening calls for.

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 thick. The Cal-Royal ED500 is the adjustable backset Grade 3 model in the same Chelsie family. The Kwikset 663 SQT uses a square turn piece on the interior with a 1 inch throw and adjusts to 2-3/8 inch or 2-3/4 inch backsets, so where an accessible turn is specified the LSD is the one to write into the schedule.

Classroom function is a distinct specification. The Falcon D111 is a Grade 1 heavy duty classroom deadbolt with adjustable backset, the Falcon D211 is the Grade 2 medium duty classroom function version with single cylinder operation, and the Hager 3118 is a Grade 1 classroom deadbolt with a Schlage C keyway and 6-pin cylinder, fire rated, for doors 1-3/8 inch to 1-3/4 inch. The Kwikset 663 SQT is a residential unit with an interior turn only and no exterior key access.

Four: Satin Nickel, Bright Chrome, Satin Chrome, and Matte Black. If you are matching a fleet of units, Satin Nickel and Matte Black are the two that most commonly line up with current Kwikset entry sets and levers on the same door.

Microban protection is built into the 663 SQT, which is the reason it turns up in multi-family and senior housing specs where touch surfaces get wiped constantly. It is a finish treatment, not a coating you apply or reapply.

The RCAL latch has a round corner faceplate. If the existing mortise in your door edge was cut square, either square the corners of the pocket with a chisel or fit a round-corner-to-square adapter plate. Note the square rose refers to the interior trim, not the latch face.

They solve different problems. The Kwikset 663 SQT is a mechanical deadbolt turned by a thumb piece on the interior with no exterior trim. The Codelocks CL200 is a surface deadbolt with key override, and the Codelocks CL2200 is an electronic surface deadbolt in medium duty, both of which mount on the door surface rather than in a bored prep. The Delaney KP400 is a Grade 2 electronic deadbolt with a programmable remote. Any of the three gives coded or remote access at the door; the 663 SQT is locked and unlocked by hand from the inside face.

No. The Arrow 460 is a mortise lock strike for latchbolt and deadbolt functions with a straight lip, sized for a 1-3/4 inch door, and it is a strike only, not a lock. The Kwikset 663 SQT ships as a complete deadbolt with the RCAL latch and a 5303 full lip strike, and the description calls for a round deadbolt strike with the 1 inch throw. Order the 460 only when replacing a mortise lock strike, not when replacing the strike on a bored tubular deadbolt.