Kwikset 660 Single Cylinder De...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$39.70
$23.56
Kwikset KWI-660-S.DS Single Cylinder Deadbolt SmartKey with RCAL Latch and Dual RCS and 5303 Full Lip Strike K3

Kwikset 660 Single Cylinder Deadbolt with SmartKey Security, RCAL Latch, Dual RCS & 5303 Full Lip Strike, K3 Keyway

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Model: 660-3S.DS
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$39.70
$23.56
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Kwikset 660 Single Cylinder Deadbolt with SmartKey Security – RCAL Latch, Dual RCS & 5303 Full Lip Strike, K3 Keyway

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.

Equipped with an RCAL adjustable latch, dual RCS round corner strikes, and a 5303 full lip strike, it ensures a precise fit and enhanced durability. The K3 keyway provides compatibility with standard Kwikset keys, making it ideal for replacements or upgrades.

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 KWI-660-S.DS Single Cylinder Deadbolt SmartKey with RCAL Latch and Dual RCS and 5303 Full Lip Strike K3

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
Product Category:
Mechanical Locks
Department:
Door Hardware

Kwikset 660-3S.DS – Frequently Asked Questions

1) Will the Kwikset 660 deadbolt fit a 2-3/8 inch backset or do I need to order a different latch?
Either backset works. The 660 ships with the RCAL adjustable latch, which adjusts to fit multiple backset configurations, so you don't order a separate latch for a 2-3/8 or a 2-3/4 inch prep. Those are the two standard residential backsets, and one latch covers both.
2) Can I re-key the Kwikset 660 myself to match my other locks?
Yes. The 660 uses SmartKey Security, which lets you re-key the cylinder in place with the existing key and a new key, no locksmith and no pulling the lock off the door. For property managers doing tenant turns, that means re-keying a unit without swapping hardware.
3) Is the Kwikset 660 keyed to the same keyway as my other Kwikset locks?
The 660 uses the K3 keyway, the standard Kwikset keyway, so it keys with common Kwikset keys. That makes it straightforward to key alike with other Kwikset hardware on the same building when you use SmartKey to align them.
4) Is the Kwikset 660 key on both sides or key and thumbturn?
Single cylinder: key on the outside, thumbturn on the inside. If you need key operation from inside as well, say for a door with glass next to it, that's a double cylinder deadbolt instead. Options there include the Callan Model 210S Grade 3 double cylinder or the Dexter DB2000 double cylinder.
5) What is a commercial Grade 1 alternative to the Kwikset 660 single cylinder deadbolt for a higher traffic opening?
The Kwikset 660 is a residential single cylinder deadbolt keyed outside with a thumbturn inside. For a heavier commercial opening, the Accentra D111 is a Grade 1 single cylinder deadbolt with a 2-3/8 inch backset, cylinder by thumbturn function, rated for doors 1-3/8 inch to 1-3/4 inch thick. The Dexter DB1000-SCT is also a Grade 1 cylinder by thumbturn deadbolt covering 1-3/8 inch to 1-7/8 inch door thickness. Both keep the same key-outside, turn-inside operation as the 660 while stepping up to Grade 1.
6) Can I use the Kwikset 660 on a fire rated door, or do I need something else?
The Kwikset 660 is a residential single cylinder deadbolt and its record does not carry a fire rating. For a fire rated opening, the Hager 3215 single cylinder deadbolt with a 1 inch throw and the Hager 3115 Grade 2 cylinder by thumbturn deadbolt are both fire rated for doors 1-3/8 inch to 1-3/4 inch thick, and the Cal-Royal CRB800 is a Grade 1 heavy duty single cylinder deadbolt with a UL 3-hour fire rated latch.
7) I need a deadbolt that is keyed on both sides instead of the Kwikset 660. What should I order?
The Kwikset 660 is single cylinder only, with a key outside and a thumbturn inside, so it cannot be converted to key both sides. For a double cylinder opening, the Dexter DB2000-DCT is a Grade 2 double cylinder deadbolt for doors 1-3/8 inch to 1-3/4 inch thick, and the Dexter DB1000-DCT is the Grade 1 double cylinder version covering 1-3/8 inch to 1-7/8 inch. The Hager 3214 is a Grade 2 double cylinder deadbolt with a Schlage C keyway if you are keying into a Schlage system. Confirm local egress code before specifying double cylinder on an exit door.
8) The Kwikset 660 uses the K3 Kwikset keyway. What deadbolt should I use if my building is keyed to Schlage C?
The Kwikset 660 carries a K3 keyway and takes standard Kwikset keys, so it will not key into a Schlage C system. The Hager 3215 is a single cylinder deadbolt with a 1 inch throw and a Schlage C keyway, and the Hager 3115 is a Grade 2 cylinder by thumbturn deadbolt also in Schlage C, both for doors 1-3/8 inch to 1-3/4 inch thick. Either keeps the same key-outside, turn-inside operation while matching your existing Schlage keying.
9) Is there a deadbolt like the Kwikset 660 that takes an interchangeable core instead of a fixed cylinder?
The Kwikset 660 ships with a fixed SmartKey cylinder in the K3 keyway, which you re-key in place rather than swapping a core. If your facility standardizes on interchangeable cores, the Deltana CL200LAIC is a Grade 2 single cylinder deadbolt prepped for an interchangeable core with a 2-3/4 inch backset, and the Delaney LM Series 301702 is a Grade 1 single cylinder deadbolt supplied less core in dull chrome US26D. The Arrow E61 26D IC is an SFIC-prepped single cylinder deadlock, less core, for doors 1-3/8 inch to 1-3/4 inch.
10) Does the Kwikset 660 come with both a square corner and a round corner strike?
It comes with dual RCS round corner strikes plus a 5303 full lip strike, so you get the round corner plates for a routed metal frame and the full lip strike for a standard wood jamb. No separate strike purchase to finish the install.
11) Does the Kwikset 660 fit a standard pre-drilled deadbolt hole?
Yes, it installs in standard door prep and the mounting hardware is included in the box. If the door already has a deadbolt bore, the 660 goes back into it with the supplied latch and strike hardware.
12) What is the alternative to Kwikset SmartKey if I want another re-keyable or adjustable backset deadbolt?
If the draw is the adjustable backset rather than SmartKey, the Brinks Raleigh Series round single cylinder deadbolt and the Brinks Mendocino Series square single cylinder both use a 4-way adjustable backset, and the Cal-Royal ED500 is a Grade 3 single cylinder with adjustable backset for 1-3/8 to 1-3/4 inch doors. None of those re-key in place the way SmartKey does; that feature is specific to the Kwikset.
13) What is the closest Grade 2 equivalent to the Kwikset 660 deadbolt?
The Kwikset 660 is a single cylinder deadbolt operated by key outside and thumbturn inside. Close Grade 2 counterparts with the same cylinder by thumbturn function include the Arrow DBX61, the Cal-Royal CB160, which adds a tamper-resistant cylinder guard, the Bravura 310B Elite in a traditional round trim, and the Dexter DB2000-SCT for doors 1-3/8 inch to 1-3/4 inch thick. None of these carry SmartKey re-keying, so they are re-keyed conventionally.
14) I want a square or contemporary trim instead of the round Kwikset 660. What are my options?
The Kwikset 660 uses a classic round escutcheon design. For squared or contemporary trim with the same key-outside, thumbturn-inside operation, the Bravura 310SC Elite is a Grade 2 contemporary square deadbolt, the Bravura 910005 is a Grade 2 rectangle deadbolt, and the Brinks Mendocino E2402 is a contemporary square single cylinder deadbolt with a 4-way adjustable backset. The Callan 200S is a Grade 3 single cylinder square trim deadbolt if the opening is light duty.
15) The Kwikset 660 has an RCAL adjustable latch. What other deadbolts handle both 2-3/8 and 2-3/4 inch backsets?
The Kwikset 660 ships with an RCAL adjustable latch that fits multiple backset configurations. Other deadbolts built the same way include the Brinks Raleigh E2401 and Brinks Mendocino E2402, both single cylinder with a 4-way adjustable backset, the Cal-Royal ED500, a Grade 3 single cylinder deadbolt with adjustable backset for 1-3/8 inch to 1-3/4 inch doors, and the Falcon D111, a Grade 1 heavy duty deadbolt with adjustable backset. If you need a fixed backset instead, the Accentra D111 is 2-3/8 inch and the Deltana CL200LA is 2-3/4 inch.
16) Is the Arrow E60 a substitute for the Kwikset 660?
No. The Kwikset 660 is keyed on the outside with a thumbturn inside. The Arrow E60 is a Grade 2 non-keyed exit deadlock with a blank plate outside and a thumbturn inside, for doors 1-3/8 inch to 1-3/4 inch thick, so it gives no key access from the exterior. Use the E60 only where the door is secured from inside. If you need a keyed single cylinder unit, the Arrow DBX61 Grade 2 cylinder by thumbturn deadbolt is the closer match.
17) Is the BEST 8T or the Arrow 460 an alternative to the Kwikset 660 deadbolt?
Neither is a complete lock. The Kwikset 660 is a full single cylinder deadbolt supplied with an RCAL latch, dual RCS round corner strikes and a 5303 full lip strike. The BEST 8T is a tubular deadbolt tube component from the T Series, not a finished deadbolt, and the Arrow 460 is a mortise lock strike for latchbolt and deadbolt functions with a straight lip, which is strike hardware only. For a drop-in deadbolt, look at the Arrow DBX61 Grade 2 cylinder by thumbturn unit instead.
18) What should I use instead of the Kwikset 660 if I want keypad or electronic entry?
The Kwikset 660 is a mechanical single cylinder deadbolt with SmartKey re-keying and no electronic credential. For code or card entry in the same deadbolt footprint, 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. The Dormakaba Nova-D is an RFID multihousing smart deadbolt for multi-family use.
19) My door is thicker than standard. Which deadbolt covers a wider door thickness range than the Kwikset 660?
The Kwikset 660 is a residential deadbolt intended for standard door preps. For thicker doors, the Deltana 7312KA2 double cylinder deadbolt covers 1-3/8 inch to 2 inch, and the Corbin Russwin DL3011 Grade 1 cylindrical deadlock covers 1-3/4 inch to 2-1/4 inch. If you need to stay single cylinder with a key and thumbturn, the Dexter DB1000-SCT Grade 1 deadbolt reaches 1-7/8 inch.
20) Is there a deadbolt with an easier-to-grip thumbturn than the Kwikset 660 for accessible units?
The Kwikset 660 uses a standard thumbturn on the interior. Where an accessible turn is required, 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, keeping the same key-outside operation. Confirm the specific ADA requirement for your occupancy before substituting.
21) What finishes does the Kwikset 660 deadbolt come in?
Five: Satin Nickel, Venetian Bronze, Satin Chrome, Bright Chrome, and Bright Brass. If you're matching existing hardware across a building, Satin Nickel and Venetian Bronze are the two that pair with most current residential trim; Bright Brass suits older brass knobsets.
22) What is a decorative cast or solid brass alternative to the Kwikset 660 deadbolt?
The Kwikset 660 comes in Venetian Bronze, Satin Nickel, Satin Chrome, Bright Chrome and Bright Brass with a plain classic trim. For a more decorative exterior, the Emtek #11 Tuscany is a lost wax cast bronze deadbolt in cylinder by thumbturn function, and the Baldwin Estates 8011 is a contemporary 1-5/8 inch double cylinder deadbolt if key-both-sides suits the door. The Emtek 8323 Modern Disc is a brass double cylinder deadbolt.
23) I only need a deadbolt on one side of the door. Is there an option other than the Kwikset 660?
The Kwikset 660 is bored through the door with a keyed cylinder outside and a thumbturn inside. If the door only needs securing from one face, the Callan 205S is a Grade 3 one-sided half-bore deadbolt, which does not require a through-bore for an exterior cylinder. The Codelocks CL200 is a surface mounted deadbolt with key override for doors where a bore is not wanted at all.
How fast can I get the Kwikset 660-3S.DS 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 660-3S.DS come with a warranty?
Absolutely. The Kwikset 660-3S.DS 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 660-3S.DS?
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