Mortise Lock

A mortise lock fits into a deep pocket cut into the door edge, rather than through a round bore like a cylindrical lockset. That construction is why mortise locks are the standard for commercial buildings, schools, and apartment entries: the heavy cast or steel lock body withstands decades of high traffic, integrates deadbolt and latch in one unit, and offers far more functions (entry, classroom, storeroom, privacy, passage) than a cylindrical lock.

When choosing a mortise lock, start with the function you need on that door. An office function locks from outside while always allowing free egress. A storeroom function is always locked outside. An entrance function adds a deadbolt for after-hours security. Then confirm handing (left or right hand, regular or reverse bevel), backset, and whether you need it keyed into an existing system. Most of the mortise locks we sell accept standard or high-security cylinders, so you can upgrade key control without changing the lock body.

We carry Grade 1 commercial mortise locks from Marks USA, Sargent, Corbin Russwin, Yale, and others, including ornamental and storm-door mortise locks if your application is a gate or security screen door. If you're replacing an old mortise lock, send us a photo and measurements and we'll match it.

Mortise Lock

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  • Adams Rite 4900-35-101-335 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset Adams Rite 4900-35-101-335 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset
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    Adams Rite 4900-35-101-335 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset

    Adams Rite
    MSRP: $161.00
    $108.54
    4900-35-101-335 Adams Rite Mortise Lock Heavy Duty Deadlatch, Flat Faceplate, 1-1/8 In. Backset, 4-5/8 In. Flat Mortised Strike, LH or RHR, Black Anodized Finish: 315/335 Series: 4900 Heavy Duty...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $161.00
    $108.54
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  • Adams Rite 4900-35-101-313 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset Adams Rite 4900-35-101-313 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset
    Quick view

    Adams Rite 4900-35-101-313 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset

    Adams Rite
    MSRP: $161.00
    $108.54
    The Adams Rite 4900 Series is a heavy-duty mortise deadlatch designed for applications requiring flexible traffic control. Perfect for facilities needing two-way access at certain times and exit-only...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $161.00
    $108.54
    Subtotal:
  • Adams Rite 4900-25-101-628 Heavy Duty Deadlatch, Flat Faceplate, 31/32" Backset Adams Rite 4900-25-101-628 Heavy Duty Deadlatch, Flat Faceplate, 31/32" Backset
    Quick view

    Adams Rite 4900-25-101-628 Heavy Duty Deadlatch, Flat Faceplate, 31/32" Backset

    Adams Rite
    MSRP: $161.00
    $108.54
    4900-25-101-628 Adams Rite Mortise Lock Heavy Duty Deadlatch, Flat Faceplate, 31/32 In. Backset, 4-5/8 In. Flat Mortised Strike, LH or RHR, Satin Aluminum Finish: 628/US28 Series: 4900 Heavy Duty...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $161.00
    $108.54
    Subtotal:
  • Adams Rite 4900-25-101-313 Heavy Duty Deadlatch, Flat Faceplate, 31/32" Backset Adams Rite 4900-25-101-313 Heavy Duty Deadlatch, Flat Faceplate, 31/32" Backset
    Quick view

    Adams Rite 4900-25-101-313 Heavy Duty Deadlatch, Flat Faceplate, 31/32" Backset

    Adams Rite
    MSRP: $161.00
    $108.54
    The Adams Rite 4900 Series is a heavy-duty mortise deadlatch designed for applications requiring flexible traffic control. It allows two-way passage during open hours and exit-only operation at other...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $161.00
    $108.54
    Subtotal:
  • Adams Rite 4513-35-IB Mortise Deadlatch 1-1/8" Backset Adams Rite 4513-35-IB Mortise Deadlatch 1-1/8" Backset
    Quick view

    Adams Rite 4513-35-IB Mortise Deadlatch 1-1/8" Backset

    Adams Rite
    MSRP: $81.00
    $54.64
    The Adams Rite 4513-35-IB is a standard-duty mortise deadlatch designed for facilities requiring flexible traffic control, such as hospitals, banks, and retail environments. Its reverse-turn key...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $81.00
    $54.64
    Subtotal:
  • Adams Rite 4530-35-101-628 1-1/8" Mortise Lock Adams Rite 4530-35-101-628 1-1/8" Mortise Lock
    Quick view

    Adams Rite 4530-35-101-628 1-1/8" Mortise Lock

    Adams Rite
    MSRP: $174.00
    $117.65
    The Adams Rite 4530-35-101-628 is a standard-duty mortise deadlatch designed for flexible traffic control in hospitals, banks, retail stores, and commercial buildings. Its reverse-turn key mechanism...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $174.00
    $117.65
    Subtotal:
  • Adams Rite 4512-36-201-628 1-1/8" Mortise Lock Adams Rite 4512-36-201-628 1-1/8" Mortise Lock
    Quick view

    Adams Rite 4512-36-201-628 1-1/8" Mortise Lock

    Adams Rite
    MSRP: $119.00
    $79.70
    The Adams Rite 4512-36-201-628 is a standard-duty mortise deadlatch designed for hospitals, banks, and retail spaces requiring flexible traffic control. Its reverse-key feature lets you hold the bolt...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $119.00
    $79.70
    Subtotal:
  • Adams Rite 4512-36-201-313 1-1/8" Mortise Lock Adams Rite 4512-36-201-313 1-1/8" Mortise Lock
    Quick view

    Adams Rite 4512-36-201-313 1-1/8" Mortise Lock

    Adams Rite
    MSRP: $119.00
    $79.70
    The Adams Rite 4512-36-201-313 is a standard-duty mortise deadlatch lock designed for commercial buildings requiring flexible traffic control. Perfect for hospitals, banks, and retail environments,...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $119.00
    $79.70
    Subtotal:
  • Adams Rite 4512-36-101-313 1-1/8" Mortise Lock Adams Rite 4512-36-101-313 1-1/8" Mortise Lock
    Quick view

    Adams Rite 4512-36-101-313 1-1/8" Mortise Lock

    Adams Rite
    MSRP: $119.00
    $79.70
    The Adams Rite 4512-36-101-313 is a standard-duty mortise lock with deadlatch operation, designed for facilities requiring flexible traffic control during and after business hours. Ideal for...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $119.00
    $79.70
    Subtotal:
  • Adams Rite 4512-35-201-628 1-1/8" Mortise Lock Adams Rite 4512-35-201-628 1-1/8" Mortise Lock
    Quick view

    Adams Rite 4512-35-201-628 1-1/8" Mortise Lock

    Adams Rite
    MSRP: $119.00
    $79.70
    The Adams Rite 4512-35-201-628 is a standard-duty mortise lock with deadlatch function, designed for facilities requiring flexible traffic control such as hospitals, banks, and retail spaces. The...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $119.00
    $79.70
    Subtotal:
  • Adams Rite 4512-35-201-313 1-1/8" Mortise Lock Adams Rite 4512-35-201-313 1-1/8" Mortise Lock
    Quick view

    Adams Rite 4512-35-201-313 1-1/8" Mortise Lock

    Adams Rite
    MSRP: $119.00
    $79.70
    The Adams Rite 4512-35-201-313 is a standard-duty mortise lock with deadlatch function, designed for commercial buildings requiring flexible traffic control. Hospitals, banks, and retail environments...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $119.00
    $79.70
    Subtotal:
  • Adams Rite 4512-35-101-313 1-1/8" Mortise Lock Adams Rite 4512-35-101-313 1-1/8" Mortise Lock
    Quick view

    Adams Rite 4512-35-101-313 1-1/8" Mortise Lock

    Adams Rite
    MSRP: $119.00
    $79.70
    The Adams Rite 4512-35-101-313 is a standard-duty mortise deadlatch designed for flexible traffic control in hospitals, banks, and commercial buildings. The reverse-turn key feature allows you to...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $119.00
    $79.70
    Subtotal:
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