Kwikset 660-SMT-RCAL-RCS/5303-...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$41.50
$27.48
Kwikset 660-SMT-RCAL-RCS/5303-K3 Round Single Cylinder Deadbolt, SmartKey Cylinder, Round Corner Adjustable Latch, With Round Corner 1" x 2-1/4" Strike and Round Corner Full Lip Strike

Kwikset 660-SMT-RCAL-RCS/5303-K3 Round Single Cylinder Deadbolt, SmartKey Cylinder, Round Corner Adjustable Latch, With Round Corner 1" x 2-1/4" Strike and Round Corner Full Lip Strike

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Model: 660-5-SMT-RCAL-RCS
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$41.50
$27.48
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Kwikset 660-SMT-RCAL-RCS/5303-K3 Round Single Cylinder Deadbolt, SmartKey Cylinder, Round Corner Adjustable Latch, With Round Corner 1" x 2-1/4" Strike and Round Corner Full Lip 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
Strike Number:
85303
Product Type:
Deadbolts
Pin Cylinder:
K3
Fire Rating:
No
Product Category:
Mechanical Locks
Department:
Door Hardware

Kwikset 660-5-SMT-RCAL-RCS – Frequently Asked Questions

1) Will the Kwikset 660 deadbolt fit a 2-3/8 inch or a 2-3/4 inch backset door?
Both. The 660 ships with the RCAL round corner adjustable latch, which adjusts to either standard residential backset, so you don't have to know the bore spacing before you order. That matters on older houses where the two backsets get mixed across a single building.
2) Can I key the Kwikset 660 SmartKey deadbolt to match the locks already on my rental units?
If those locks are Kwikset on the KW1/K3 keyway, yes. The 660 uses the K3 pin cylinder with SmartKey, so you rekey it in place with the learn tool and a working key rather than pulling the lock or pinning a cylinder. For a property manager standardizing a building, that means one key can be pushed across doors without a locksmith visit each turnover.
3) Is the Kwikset 660 deadbolt suitable for a commercial or multi-family corridor door?
It's classified residential, so for a leased commercial opening or a high-traffic corridor you're better off with a graded commercial deadbolt. The Accentra D111 and the Delaney LM Series are Grade 1 cylinder x thumbturn deadbolts we carry, and the Arrow DBX61 and Cal-Royal CB160 are Grade 2. Use the 660 on apartment unit doors and houses where SmartKey rekeying is the point.
4) I need a deadbolt on a fire rated door - can I use the Kwikset 660?
The Kwikset 660 deadbolt is not fire rated. If the opening requires a fire rated deadbolt, the Hager 3215 is a fire rated Grade 2 single cylinder deadbolt with a 1 inch throw for doors 1-3/8 inch to 1-3/4 inch thick, and the Hager 3115 is a fire rated cylinder x thumbturn deadbolt over the same door thickness range. Cal-Royal's CRB800 is a heavy duty single cylinder deadbolt with a UL 3-hour fire rated latch.
5) What is a Grade 1 alternative to the Kwikset 660 single cylinder deadbolt for a commercial opening?
The Kwikset 660 deadbolt is a residential-rated single cylinder unit with a SmartKey cylinder. For a heavier commercial opening, the Accentra D111 is a Grade 1 single cylinder deadbolt with a 2-3/8 inch backset and a cylinder x thumbturn function, covering doors 1-3/8 inch to 1-3/4 inch thick. The Dexter DB1000-SCT is another Grade 1 cylinder x thumbturn deadbolt, fitting doors 1-3/8 inch to 1-7/8 inch. Both keep the key outside, thumbturn inside arrangement of the 660 while carrying an ANSI/BHMA Grade 1 rating.
6) The Kwikset 660 is single cylinder - what should I order for a door with glass beside it?
The Kwikset 660 is keyed outside with a thumbturn inside, so a hand reaching through adjacent glazing can throw it. Where a keyed function is wanted on both sides, the Dexter DB1000-DCT is a Grade 1 double cylinder deadbolt for doors 1-3/8 inch to 1-7/8 inch, and the Dexter DB2000-DCT is the Grade 2 double cylinder version for doors 1-3/8 inch to 1-3/4 inch. The Design Hardware D1 Series is an extra heavy duty Grade 1 double cylinder deadbolt for 1-3/4 inch doors, and the Baldwin Reserve Contemporary Round is a double cylinder deadbolt with round trim similar in shape to the 660.
7) What deadbolt do I use instead of the Kwikset 660 on an exit door that should not be keyed from outside?
The Kwikset 660 is a keyed single cylinder deadbolt with an outside cylinder. On an exit-only door where no outside key is wanted, 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. If you want a one-sided deadbolt in a half-bore prep instead, the Callan 205S is a Grade 3 one-sided half-bore deadbolt.
8) We key our buildings on an interchangeable core system - what replaces the Kwikset 660 SmartKey deadbolt?
The Kwikset 660 uses a SmartKey cylinder on the K3 keyway, which is a Kwikset-keyed cylinder rather than an IC format. For interchangeable core keying, the Arrow E61 is a Grade 2 single cylinder deadlock with SFIC prep supplied less core, for doors 1-3/8 inch to 1-3/4 inch, and the Deltana CL200LAIC is a Grade 2 single cylinder deadbolt prepped for an interchangeable core, less cylinder, with a 2-3/4 inch backset. The Delaney LM Series is a Grade 1 single cylinder less-core deadbolt in dull chrome US26D.
9) Can I match the Kwikset 660 SmartKey cylinder to a Schlage-keyed building?
No. The Kwikset 660 uses a SmartKey cylinder on the Kwikset K3 keyway, so it keys to Kwikset keys. For a building already on Schlage C, the Hager 3215 is a Grade 2 single cylinder deadbolt with a Schlage C keyway, the Hager 3118 is a Grade 1 classroom deadbolt with a Schlage C keyway and 6-pin cylinder, and the Hager 3214 is the double cylinder Schlage C option. All three cover doors 1-3/8 inch to 1-3/4 inch thick.
10) I need an easier thumbturn than the Kwikset 660 for an accessible unit - what are the options?
The Kwikset 660 uses a standard thumbturn on the inside. Where an accessible turn is called for, the Cal-Royal LSD is a Grade 3 single cylinder deadbolt with an ADA ergonomic thumbturn, covering doors 1-3/8 inch to 1-3/4 inch thick, and keeps the same cylinder x thumbturn function as the 660.
11) Single cylinder or double cylinder deadbolt for an entry door with glass next to it?
The Kwikset 660 is single cylinder: key outside, thumbturn inside. That's the right call for most entries, but where there's glass within reach of the turn, some jurisdictions push you to a keyed-both-sides lock. For that, the Callan 210S Grade 3 double cylinder or the Dexter DB2000 double cylinder are options we carry. Bear in mind a double cylinder needs a key to exit, which is a life-safety trade-off.
12) My door frame has a square corner strike mortise. Will the round corner strikes on this Kwikset 660 work?
Not without chiseling. Both strikes supplied with the 660 are round corner: the 1 x 2-1/4 inch RCS and the full lip 5303. On a square-cut jamb prep you'd either square the corners of the frame cutout or source a square corner strike. Check the jamb before you order for a whole floor of doors, since mixing the two preps in one building is common.
13) Does the Kwikset 660 include everything needed to install it, or do I have to order screws and a strike separately?
Everything for a standard deadbolt prep is in the box: the outside cylinder, inside thumbturn, the RCAL adjustable latch, and both strikes. It goes into an existing 2-1/8 inch cross bore and 1 inch edge bore with no extra hardware. What it does not include is a keyed-alike setup out of the carton, you rekey to your existing key with the SmartKey tool after install.
14) What is a straight swap for a Kwikset 660 if I want a keypad instead of a key?
For the same opening prep with electronic access, the Delaney KP400 Grade 2 electronic deadbolt with programmable remote is one we stock. If you want to keep mechanical keys but move up in grade on the same door, the Dexter DB1000 single cylinder is Grade 1 and covers 1-3/8 to 1-7/8 inch doors.
15) Is the Arrow 460 a substitute for the strikes that come with the Kwikset 660 deadbolt?
No. The Kwikset 660-SMT-RCAL-RCS/5303-K3 is a complete deadbolt supplied with an adjustable round corner latch, a round corner 1 inch by 2-1/4 inch strike, and a round corner full lip strike. The Arrow 460 is a mortise lock strike only, cut for latchbolt and deadbolt functions with a straight lip for 1-3/4 inch doors. It is a strike plate for a mortise lock body, not a replacement for the bored-door strikes packed with the 660.
16) What is the closest equivalent to the Kwikset 660 if I do not need SmartKey rekeying?
The Kwikset 660 pairs a single cylinder key-outside, thumbturn-inside deadbolt with the SmartKey cylinder that lets you rekey without pulling the lock. For the same round single cylinder format without SmartKey, the Bravura 310B Elite is a Grade 2 traditional round deadbolt with cylinder x thumbturn function, and the Bravura 310RC Elite is the contemporary round version of the same Grade 2 deadbolt. The Callan 200S-G2 is a Grade 2 single cylinder deadbolt with round trim.
17) What is a square-trim alternative to the round Kwikset 660 deadbolt?
The Kwikset 660-SMT-RCAL-RCS/5303-K3 uses round trim. For a square face on the same single cylinder key-and-thumbturn function, the Bravura 310SC Elite is a Grade 2 contemporary square deadbolt, the Bravura Rectangle series offers a Grade 2 rectangular single cylinder deadbolt, and the Callan 200S is a Grade 3 single cylinder deadbolt with square trim. The Brinks Mendocino E2402 is a contemporary square single cylinder deadbolt with a 4-way adjustable backset, matching the adjustable latch arrangement of the 660.
18) Which other deadbolts have an adjustable backset like the Kwikset 660 RCAL latch?
The Kwikset 660 ships with the RCAL adjustable latch so one unit covers multiple backset configurations. Comparable adjustable-backset deadbolts include the Brinks Raleigh E2401, a transitional round single cylinder deadbolt with a 4-way adjustable backset; the Cal-Royal ED500, a Grade 3 single cylinder deadbolt with adjustable backset for doors 1-3/8 inch to 1-3/4 inch; and the Falcon D111, a Grade 1 heavy duty deadbolt with adjustable backset.
19) Is an electronic deadbolt a drop-in alternative to the Kwikset 660 SmartKey?
Not a drop-in. The Kwikset 660 is a mechanical single cylinder deadbolt keyed outside with a thumbturn inside. Electronic options change how the door is credentialed: 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 Codelocks CL2200 is a medium duty electronic surface deadbolt in brushed steel. These need power and, in the surface-mounted case, a different door prep than a bored deadbolt.
20) What is the difference between the Kwikset 660 deadbolt and a mortise deadlock like the Corbin Russwin DL3011?
The Kwikset 660 is a bored tubular deadbolt supplied with an adjustable latch and two round corner strikes, sized for standard residential door preps. The Corbin Russwin DL3011 is a Grade 1 cylindrical deadlock with cylinder outside and blank plate inside, for doors 1-3/4 inch to 2-1/4 inch, and the DL3211 is the same Grade 1 deadlock family for 1-3/4 inch doors. Those are keyed one side only with no thumbturn, so they are not a like-for-like swap for a key-and-thumbturn deadbolt.
21) What is a Grade 2 step up from the Kwikset 660 residential deadbolt?
The Kwikset 660 is a residential single cylinder deadbolt. Moving to a Grade 2 commercial unit in the same cylinder x thumbturn function, the Dexter DB2000-SCT covers doors 1-3/8 inch to 1-3/4 inch, 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. The Falcon D211 is a Grade 2 medium duty classroom function deadbolt if the opening needs that function.
22) What finishes does the Kwikset 660 SmartKey round deadbolt come in?
Antique brass and black. If you're matching existing hardware across a set of doors, those are the two trims to choose between; the bolt, latch and strike package is the same either way.
23) The Kwikset 660 comes in Antique Brass and Black - what if I need a decorative bronze or cast finish deadbolt?
The Kwikset 660 round deadbolt is offered in Antique Brass and Black. For a decorative alternative, the Emtek #11 Tuscany is a lost wax cast bronze deadbolt with cylinder x thumbturn function, the Emtek 8323 Modern Disc is a brass double cylinder deadbolt, and the Baldwin Estates 8011 is a contemporary 1-5/8 inch double cylinder deadbolt. Note the 8323 and 8011 are double cylinder, so they key on both sides rather than using a thumbturn.
How fast can I get the Kwikset 660-5-SMT-RCAL-RCS 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 660-5-SMT-RCAL-RCS come with a warranty?
Absolutely. The Kwikset 660-5-SMT-RCAL-RCS 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 660-5-SMT-RCAL-RCS?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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