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Schlage One Sided Deadbolts

Shop Schlage one-sided deadbolts for doors where locking and unlocking should be controlled from the interior thumbturn only. Compare the B80 without exterior trim and the B81 with an exterior cover plate. Neither model provides an outside key cylinder or exterior unlocking function.

Door preparation is the main difference to check before ordering. The B80 requires a special partial-depth bore that leaves the outside door face intact; the B81 uses an exterior plate to cover the exposed outside preparation. Compare the selected model’s installation template, door thickness, backset and finish to your opening before choosing a replacement.
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  • Schlage B81716 B81 B Series One Sided Deadbolt with Thumbturn Aged Bronze
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    Schlage B81 B Series One Sided Deadbolt with Thumbturn

    $47.88 USD $80.00
    +6
  • Schlage B80716 B80 B Series One Sided Deadbolt with Thumbturn Aged Bronze
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    Schlage B80 B Series One Sided Deadbolt with Thumbturn

    $44.89 USD $75.00
    +4

Choosing Schlage B80 and B81 One-Sided Deadbolts

A one-sided deadbolt, also called a single-sided deadbolt, is selected for interior-only operation. Choose this function when you specifically do not want the deadbolt to be unlocked from outside. Before ordering, consider how everyone who uses the doorway will enter and leave, including anyone who normally relies on an exterior key. The absence of outside unlocking is a functional choice, not just a difference in trim. Review the complete door hardware arrangement so that the selected deadbolt suits the way the opening is used.

Compare the Schlage B80 and B81 by looking at both faces of the door. The B80 has no exterior plate and calls for a special bore drilled only partway through the door. The B81 has a blank exterior plate covering the exposed outside preparation. An existing hole through both door faces therefore matters when selecting between them. Consult the exact installation template before drilling or replacing hardware; do not assume that the two versions install in the same preparation simply because both use an interior thumbturn.

Record the door thickness and backset, then compare those measurements with the selected model’s specifications. Backset is measured from the door edge to the center of the lock bore. Also inspect the edge preparation, strike location and clearance around the interior thumbturn. When replacing old hardware, note the dimensions of any visible marks around the existing trim so you can assess the finished appearance. Select a finish that coordinates with the door’s knob, lever and hinges, and review the product listing for the supplied installation components. Check these details before purchasing hardware for multiple doors.

Keep the locking function separate from the appearance when comparing alternatives. If exterior key access is needed, review Schlage single cylinder deadbolts instead. Browse all Schlage deadbolts to compare other functions before finalizing your project. For either B80 or B81, retain the model number and installation instructions with your order details so the installer can check the correct preparation. A complete one-sided deadbolt should also be distinguished from a standalone deadbolt cover plate: review the package contents when shopping for replacement trim or a complete lock assembly.