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 5017-02-630 Wood Door Deadlock/Deadlatch Adams Rite 5017-02-630 Wood Door Deadlock/Deadlatch
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    Adams Rite 5017-02-630 Wood Door Deadlock/Deadlatch

    Adams Rite
    MSRP: $85.00
    $56.93
    The Adams Rite 5017-02-630 is a heavy-duty wood door deadlock/deadlatch designed for commercial and institutional applications requiring reliable access control. This satin stainless steel unit...
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  • Adams Rite 4913-36-IB Heavy Duty Deadlatch, Lock Body Only, 1-1/8" Backset Adams Rite 4913-36-IB Heavy Duty Deadlatch, Lock Body Only, 1-1/8" Backset
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    Adams Rite 4913-36-IB Heavy Duty Deadlatch, Lock Body Only, 1-1/8" Backset

    Adams Rite
    MSRP: $112.00
    $75.90
    4913-36-IB Adams Rite Mortise Lock Heavy Duty Deadlatch, Lock Body Only, 1-1/8 In. Backset, Less Strike, RH or LHR, Zinc Plated Finish: 603/US2G Series: 4900 Heavy Duty Deadlatch Type: Locks,...
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  • Adams Rite 4913-35-IB Heavy Duty Deadlatch, Lock Body Only, 1-1/8" Backset Adams Rite 4913-35-IB Heavy Duty Deadlatch, Lock Body Only, 1-1/8" Backset
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    Adams Rite 4913-35-IB Heavy Duty Deadlatch, Lock Body Only, 1-1/8" Backset

    Adams Rite
    MSRP: $112.00
    $75.90
    4913-35-IB Adams Rite Mortise Lock Heavy Duty Deadlatch, Lock Body Only, 1-1/8 In. Backset, Less Strike, LH or RHR, Zinc Plated Finish: 603/US2G Series: 4900 Heavy Duty Deadlatch Type: Locks,...
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  • Adams Rite 4900-46-101-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/2" Backset Adams Rite 4900-46-101-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/2" Backset
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    Adams Rite 4900-46-101-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/2" Backset

    Adams Rite
    MSRP: $161.00
    $108.54
    4900-46-101-628 Adams Rite Mortise Lock Heavy Duty Deadlatch, Flat Faceplate, 1-1/2 In. Backset, 4-5/8 In. Flat Mortised Strike, RH or LHR, Satin Aluminum Finish: 628/US28 Series: 4900 Heavy Duty...
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  • Adams Rite 4900-45-201-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/2" Backset Adams Rite 4900-45-201-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/2" Backset
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    Adams Rite 4900-45-201-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/2" Backset

    Adams Rite
    MSRP: $161.00
    $108.54
    The Adams Rite 4900-45-201-628 is a heavy-duty mortise deadlatch designed for facilities needing flexible traffic control. Its reverse-key function allows you to hold the bolt retracted, enabling...
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  • Adams Rite 4900-45-101-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/2" Backset Adams Rite 4900-45-101-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/2" Backset
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    Adams Rite 4900-45-101-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/2" Backset

    Adams Rite
    MSRP: $161.00
    $108.54
    4900-45-101-628 Adams Rite Mortise Lock Heavy Duty Deadlatch, Flat Faceplate, 1-1/2 In. Backset, 4-5/8 In. Flat Mortised Strike, LH or RHR, Satin Aluminum Finish: 628/US28 Series: 4900 Heavy Duty...
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  • Adams Rite 4900-36-201-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset Adams Rite 4900-36-201-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset
    Quick view

    Adams Rite 4900-36-201-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset

    Adams Rite
    MSRP: $161.00
    $108.54
    The Adams Rite 4900-36-201-628 is a heavy-duty mortise deadlatch designed for applications requiring flexible traffic control. With a reverse-turn key feature, it allows two-way passage when needed...
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    MSRP: $161.00
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  • Adams Rite 4900-36-101-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset Adams Rite 4900-36-101-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset
    Quick view

    Adams Rite 4900-36-101-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset

    Adams Rite
    MSRP: $161.00
    $108.54
    4900-36-101-628 Adams Rite Mortise Lock Heavy Duty Deadlatch, Flat Faceplate, 1-1/8 In. Backset, 4-5/8 In. Flat Mortised Strike, RH or LHR, Satin Aluminum Finish: 628/US28 Series: 4900 Heavy Duty...
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    MSRP: $161.00
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  • Adams Rite 4900-36-101-313 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset Adams Rite 4900-36-101-313 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset
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    Adams Rite 4900-36-101-313 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset

    Adams Rite
    MSRP: $161.00
    $108.54
    4900-36-101-313 Adams Rite Mortise Lock Heavy Duty Deadlatch, Flat Faceplate, 1-1/8 In. Backset, 4-5/8 In. Flat Mortised Strike, RH or LHR, Dark Bronze Anodized Finish: 313 Series: 4900 Heavy Duty...
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    MSRP: $161.00
    $108.54
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  • Adams Rite 4900-35-201-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset Adams Rite 4900-35-201-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset
    Quick view

    Adams Rite 4900-35-201-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset

    Adams Rite
    MSRP: $161.00
    $108.54
    4900-35-201-628 Adams Rite Mortise Lock Heavy Duty Deadlatch, Flat Faceplate, 1-1/8 In. Backset, 2-5/8 In. Flat Mortised Strike, LH or RHR, Satin Aluminum Finish: 628/US28 Series: 4900 Heavy Duty...
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    MSRP: $161.00
    $108.54
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  • Adams Rite 4900-35-201-313 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset Adams Rite 4900-35-201-313 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset
    Quick view

    Adams Rite 4900-35-201-313 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset

    Adams Rite
    MSRP: $161.00
    $108.54
    The Adams Rite 4900-35-201-313 is a heavy-duty mortise deadlatch designed for facilities requiring flexible traffic control. It solves the problem of managing two-way traffic by allowing the bolt to...
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    Qty in Cart: 0
    Quantity:
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    MSRP: $161.00
    $108.54
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  • Adams Rite 4900-35-102-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset Adams Rite 4900-35-102-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset
    Quick view

    Adams Rite 4900-35-102-628 Heavy Duty Deadlatch, Flat Faceplate, 1-1/8" Backset

    Adams Rite
    MSRP: $161.00
    $108.54
    4900-35-102-628 Adams Rite Mortise Lock Heavy Duty Deadlatch, Flat Faceplate, 1-1/8 In. Backset, 4-5/8 In. Radius Mortised Strike, LH or RHR, Satin Aluminum Finish: 628/US28 Series: 4900 Heavy Duty...
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    Qty in Cart: 0
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    MSRP: $161.00
    $108.54
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