Kwikset 660-SMT-RCALFD-5303 R...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$44.50
$29.18
Kwikset 660-SMT-RCALFD-5303 Round Single Cylinder Deadbolt SmartKey with Round Corner Adjustable 20 Minute UL Latch and 85303 Full Lip Round Corner Strike

Kwikset 660-SMT-RCALFD-5303 Round Single Cylinder Deadbolt SmartKey with Round Corner Adjustable 20 Minute UL Latch and 85303 Full Lip Round Corner Strike

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Model: 660-26D-SMT-RCALFD-5303-KA
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Kwikset 660-SMT-RCALFD-5303 Round Single Cylinder Deadbolt SmartKey with Round Corner Adjustable 20 Minute UL Latch and 85303 Full Lip Round Corner Strike

The Kwikset 660 Single Cylinder Deadbolt delivers reliable security with the convenience of SmartKey Security™, allowing you to re-key your lock in seconds without removing it from the door. Perfect for exterior doors, this deadbolt offers superior protection against lock picking and bumping while maintaining a sleek, classic design that fits any home style.

Features & Benefits:

  • Single cylinder deadbolt – operated by key outside and thumb turn inside

  • SmartKey Security™ – re-key your lock quickly without a locksmith

  • RCAL adjustable latch – fits multiple backset configurations

  • Dual RCS round corner strikes – for a secure, snug fit

  • 5303 full lip strike – added strength and durability

  • K3 keyway – compatible with Kwikset keys for easy keying options

  • Durable construction – built to withstand daily use and harsh conditions

  • Easy installation – fits standard door preps with included hardware

The Kwikset 660 Single Cylinder Deadbolt is a proven choice for homeowners who want both security and convenience without compromising style.

RESOURCES & DOWNLOADS

Kwikset 660-SMT-CP Smart Key Round Single Cylinder Deadbolt with Thumbturn, Round Corner Adjustable Deadbolt, Round Corner Strike

Manufacturer Resources

Product Specs

Product Group:
Mechanical Locks
Product Subgroup:
Deadbolts
Subcategory:
Deadbolts
Commercial/Residential:
Residential
Product Features:
SmartKey
Product Attribute:
Deadbolts
Product Type:
Deadbolts
Fire Rating:
Yes
Product Category:
Mechanical Locks
Department:
Door Hardware

Kwikset 660-26D-SMT-RCALFD-5303-KA – Frequently Asked Questions

1) Can I re-key the Kwikset 660 deadbolt myself without pulling it off the door?
Yes. The 660 uses SmartKey Security, so the cylinder re-keys in place with a learn tool and a new key, no locksmith and no removal from the door. For a property manager doing tenant turnovers, that means one deadbolt can be reset to a new key at every move-out and multiple doors can be brought onto a single key. The cylinder is a K3 keyway, so it takes Kwikset keys.
2) Does the Kwikset 660-SMT-RCALFD-5303 come with the strike plates, or do I order those separately?
Everything for the door and jamb is in the box. It ships with the RCAL round corner adjustable latch, dual RCS round corner strikes, and the 85303 full lip round corner strike, plus the mounting hardware for a standard deadbolt prep. No separate strike order needed.
3) Will this Kwikset deadbolt work on my door if I do not know the backset?
The RCAL latch supplied with the 660 is adjustable, so it covers more than one backset configuration rather than being fixed to a single one. That makes it a safe pick for a replacement where you have not measured the existing prep, or for a mixed building where the doors were not all bored the same way.
4) Is the Kwikset 660 fire rated, and is it a commercial deadbolt?
The latch supplied is a 20 minute UL latch, and the 660 carries a fire rating. It is catalogued for residential use, however, so for a commercial opening needing heavier duty or a longer fire rating you would step to something like the Cal-Royal CRB800, a Grade 1 single cylinder deadbolt with a UL 3-hour fire rated latch.
5) My jamb has square corner strike cutouts. Is the 660-SMT-RCALFD-5303 the right version?
No. This build is round corner throughout: round corner adjustable latch and round corner strikes, including the 85303 full lip round corner strike. Dropping a round corner faceplate into a square corner mortise leaves gaps at the corners. For an existing square corner prep you want the square corner latch and strike version instead.
6) I need an interchangeable core deadbolt - can I use the Kwikset 660 SmartKey?
No. The Kwikset 660 is a SmartKey deadbolt on the K3 keyway and is re-keyed in place rather than by swapping a core, so it does not accept an interchangeable core. For IC openings, the Arrow E61 is a Grade 2 single cylinder deadlock with SFIC prep supplied less core for 1-3/8 inch to 1-3/4 inch doors, the Deltana CL200LAIC is a Grade 2 single cylinder deadbolt with interchangeable core prep and a 2-3/4 inch backset, and the Delaney LM Series is a Grade 1 single cylinder less core deadbolt in dull chrome US26D.
7) I need a deadbolt keyed to Schlage C instead of the Kwikset K3 keyway - what should I order?
The Kwikset 660 uses the K3 keyway and SmartKey re-keying, so it keys into Kwikset key systems. If your building is on Schlage C, the Hager 3215 is a single cylinder deadbolt with a 1 inch throw in Schlage C keyway for 1-3/8 inch to 1-3/4 inch doors, and the Hager 3115 is a Grade 2 cylinder x thumbturn deadbolt with the Schlage C keyway over the same door thickness range. Both are fire rated.
8) The Kwikset 660 has a thumbturn inside - what do I use on a door that needs a key on both sides?
The Kwikset 660 is single cylinder, key outside and thumbturn inside, so it cannot be locked from the interior with a key. For double cylinder operation, the Hager 3214 is a Grade 2 double cylinder deadbolt with a Schlage C keyway for 1-3/8 inch to 1-3/4 inch doors, the Dexter DB2000 double cylinder is Grade 2 over the same door range, and the Design Hardware D1 Series is a Grade 1 extra heavy duty double cylinder deadbolt for 1-3/4 inch doors. Check local egress code before specifying double cylinder on an exit door.
9) Which deadbolts look like substitutes for the Kwikset 660 but will not drop into the same bored door prep?
Several deadbolts in the same family are not tubular bored-door replacements for the 660. The Emtek 2051 is a European mortise deadbolt with an integrated roller latch, so it needs a mortise pocket. The Codelocks CL200 is a surface-mounted deadbolt with key override, and the Codelocks CL2200 is an electronic surface deadbolt in brushed steel - both mount on the door face rather than in a bore. The Arrow 460 is a mortise lock strike for latchbolt and deadbolt functions, not a lock at all. If you are replacing a standard bored deadbolt, stay with a tubular single cylinder unit such as the Dexter DB2000 single cylinder.
10) What deadbolt should I use instead of the Kwikset 660 on a door that needs no key on the inside and no outside cylinder?
The Kwikset 660 is keyed outside with a thumbturn inside, so it always carries an exterior cylinder. Where the opening needs thumbturn-only operation, the Arrow E60 is a Grade 2 non-keyed exit deadlock with a blank plate outside and thumbturn inside for 1-3/8 inch to 1-3/4 inch doors. For a one-sided application on a door with only a half bore, the Callan Model 205S is a Grade 3 one-sided half-bore deadbolt.
11) The Kwikset 660 is fire rated - what other deadbolts carry a fire rating for a labeled opening?
The Kwikset 660 carries a fire rating and ships with a round corner adjustable 20 minute UL latch. Fire rated alternatives include the Hager 3115 and Hager 3215 single cylinder deadbolts and the Hager 3214 double cylinder, all fire rated for 1-3/8 inch to 1-3/4 inch doors on the Schlage C keyway, and the Hager 3118 Grade 1 classroom deadbolt. The Cal-Royal CRB800 is a Grade 1 heavy duty single cylinder deadbolt with a UL 3-hour fire rated latch if the label calls for a longer rating than 20 minutes.
12) Is this a single cylinder or double cylinder deadbolt, and which should I use on a door with glass next to it?
The 660 is single cylinder: key on the outside, thumbturn on the inside. That is the normal choice for egress, since nobody needs a key to get out. Where there is glass in or beside the door and local code allows it, a double cylinder (key both sides) is what people reach for so an intruder cannot break the glass and turn the thumbturn. For that, options include the Dexter DB1000 Grade 1 double cylinder or the Hager 3214 Grade 2 double cylinder.
13) Is the Kwikset 660 tough enough for an apartment building entry door?
The 660 is a residential grade deadbolt, which suits unit entry doors and single family exterior doors. For a high traffic common entrance or anywhere a spec calls out ANSI Grade 1, move up: the Accentra D111 and the Delaney LM Series are Grade 1 single cylinder deadbolts, and the Design Hardware D1 Series is rated extra heavy duty.
14) Can I add this Kwikset 660 to doors that already have a Kwikset knob or lever so one key runs both?
Yes, as long as the existing Kwikset trim is on the same K3 keyway. The 660 cylinder is K3, so it accepts Kwikset keys, and because it is SmartKey you can re-key it in place to match the key already cut for the knob rather than sending anything out.
15) Is there a heavier deadbolt than the Kwikset 660 for a school or classroom door?
The Kwikset 660 is a residential deadbolt. For classroom-function openings, the Falcon D111 is a Grade 1 heavy duty classroom deadbolt with an adjustable backset in cylinder x thumbturn, the Falcon D211 is the Grade 2 medium duty classroom version, and the Hager 3118 is a Grade 1 classroom deadbolt with a 6-pin Schlage C cylinder for 1-3/8 inch to 1-3/4 inch doors. Corbin Russwin DL3211 is a Grade 1 cylindrical deadlock for 1-3/4 inch doors if the opening takes a cylindrical prep.
16) What is the closest match to the Kwikset 660 if I want an adjustable backset but a different brand?
The Kwikset 660 ships with the RCAL adjustable latch that covers multiple backset settings. Comparable adjustable-backset single cylinder deadbolts include the Brinks Raleigh Series round deadbolt with a 4-way adjustable backset, the Brinks Mendocino Series in a square contemporary trim with the same 4-way adjustable backset, and the Cal-Royal ED500, a Grade 3 single cylinder deadbolt with adjustable backset for 1-3/8 inch to 1-3/4 inch doors. All three are cylinder x thumbturn like the 660.
17) The Kwikset 660 is round trim - what is the equivalent in square or rectangular trim?
The 660 uses round trim on both sides. For a square or rectangular look in the same single cylinder, cylinder x thumbturn function, the Bravura 310SC Elite is a Grade 2 contemporary square deadbolt, the Bravura 910 is a Grade 2 rectangle single cylinder deadbolt, and the Callan Model 200S is a Grade 3 single cylinder square trim deadbolt. Bravura also offers the 310RC Elite in a Grade 2 contemporary round trim if you want to stay round.
18) Is there an electronic or keypad deadbolt I can use in place of the Kwikset 660 SmartKey?
The Kwikset 660 is a mechanical key-and-thumbturn deadbolt. If the opening is moving to credential or code access, the Delaney KP400 is a Grade 2 electronic deadbolt with a programmable remote, the Dormakaba Saffire LX-D is an RFID electronic deadbolt with BLE and electronic lock override, and the Dormakaba Nova-D is an RFID multihousing smart electronic deadbolt. The Codelocks CL2210 is an electronic mortise deadbolt where the door is prepped for a mortise case.
19) I have thicker doors than the Kwikset 660 latch covers - which deadbolt goes on a 2 inch or thicker door?
For doors thicker than the common 1-3/4 inch, the Corbin Russwin DL3011 is a Grade 1 cylindrical deadlock covering 1-3/4 inch to 2-1/4 inch doors, and the Deltana 7312KA2 is a Grade 3 heavy duty double cylinder deadbolt covering 1-3/8 inch to 2 inch doors. Both are keyed deadbolt functions, so confirm whether the opening needs cylinder x thumbturn or cylinder x blank before ordering.
20) What is the difference between the Kwikset 660 and the Cal-Royal CB160 or LSD deadbolts?
All three are single cylinder cylinder x thumbturn deadbolts. The Kwikset 660 is residential with SmartKey re-keying on the K3 keyway and a 20 minute UL round corner adjustable latch. The Cal-Royal CB160 is Grade 2 with a tamper-resistant cylinder guard. The Cal-Royal LSD is Grade 3 with an ADA ergonomic thumbturn for 1-3/8 inch to 1-3/4 inch doors, which is the one to look at when the interior turn has to meet accessibility requirements.
21) What finish does the Kwikset 660-SMT-RCALFD-5303 come in?
Satin chrome. If you are matching existing hardware, satin chrome reads as the brushed silver tone and pairs with US26D dull chrome and US32D stainless trim on adjacent doors without looking off.
22) What is the difference between the 660 with the full lip strike and a plain strike plate?
The 85303 full lip strike has a lip that wraps the jamb edge, which adds material behind the bolt and protects the jamb face from bolt wear. A flat strike with no lip sits only on the jamb face. On an exterior door being kicked or pried, the full lip is the one you want, and it is included here rather than sold on.
How fast can I get the Kwikset 660-26D-SMT-RCALFD-5303-KA delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Kwikset 660-26D-SMT-RCALFD-5303-KA come with a warranty?
Absolutely. The Kwikset 660-26D-SMT-RCALFD-5303-KA is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Kwikset 660-26D-SMT-RCALFD-5303-KA?
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