The Kwikset 663 fire-rated one-sided deadbolt is designed for doors requiring interior thumbturn deadbolt control without a keyed exterior cylinder.

An interior thumbturn operates the deadbolt without a keyed exterior cylinder. The verified keying configuration is pin-and-tumbler cylinder.

Product Details

• Manufacturer part number: 663
• Function: Fire-Rated One-Sided Deadbolt
• Application: Doors requiring interior thumbturn deadbolt control without a keyed exterior cylinder
• Operation: An interior thumbturn operates the deadbolt without a keyed exterior cylinder
• Keying: Pin-and-tumbler cylinder
• Series: Kwikset Security Series
• Backset: 2-3/4
• Door thickness: 1-3/8 to 1-3/4
• Cross bore: 2-1/8 Bore
• Published certification / grade: Grade 3

Included and configuration: One-sided deadbolt assembly with interior thumbturn; exterior trim and included latch or strike follow the selected model.

Compatibility: Confirm door preparation, backset, thickness, exterior plate configuration, latch and strike requirements for the exact SKU.

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