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 MS1850S-320-628 MS Deadlock Flat Faceplate 1-1/8" Backset Short Bolt Adams Rite MS1850S-320-628 MS Deadlock Flat Faceplate 1-1/8" Backset Short Bolt
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    Adams Rite MS1850S-320-628 MS Deadlock Flat Faceplate 1-1/8" Backset Short Bolt

    Adams Rite
    MSRP: $92.00
    $62.23
    The Adams Rite MS1850S-320-628 is a heavy-duty aluminum deadlock designed for commercial aluminum-framed doors and storefront applications. Its flat faceplate and short bolt mechanism provide...
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    MSRP: $92.00
    $62.23
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  • Adams Rite MS1850S-320-313 MS Deadlock Flat Faceplate 1-1/8" Backset Short Bolt Adams Rite MS1850S-320-313 MS Deadlock Flat Faceplate 1-1/8" Backset Short Bolt
    Quick view

    Adams Rite MS1850S-320-313 MS Deadlock Flat Faceplate 1-1/8" Backset Short Bolt

    Adams Rite
    MSRP: $92.00
    $62.23
    The Adams Rite MS1850S is a heavy-duty aluminum door deadlock designed for commercial and industrial applications requiring reliable perimeter security. Its flat faceplate and short bolt provide a...
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    MSRP: $92.00
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  • Adams Rite MS1850S-310-628 MS Deadlock Flat Faceplate 1-1/8" Backset Straight Bolt Adams Rite MS1850S-310-628 MS Deadlock Flat Faceplate 1-1/8" Backset Straight Bolt
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    Adams Rite MS1850S-310-628 MS Deadlock Flat Faceplate 1-1/8" Backset Straight Bolt

    Adams Rite
    MSRP: $92.00
    $62.23
    MS1850S-310-628 Adams Rite Aluminum Door Deadlocks MS Deadlock, Flat Faceplate, 1-1/8" Backset, Straight Bolt, Aluminum Finish: 628/US28 Series: MS Deadlock Type: Locks, Cylinders, Cores, Keyblanks...
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    MSRP: $92.00
    $62.23
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  • Adams Rite MS1850S-310-313 MS Deadlock Flat Faceplate 1-1/8" Backset Straight Bolt Adams Rite MS1850S-310-313 MS Deadlock Flat Faceplate 1-1/8" Backset Straight Bolt
    Quick view

    Adams Rite MS1850S-310-313 MS Deadlock Flat Faceplate 1-1/8" Backset Straight Bolt

    Adams Rite
    MSRP: $92.00
    $62.23
    MS1850S-310-313 Adams Rite Aluminum Door Deadlocks MS Deadlock, Flat Faceplate, 1-1/8" Backset, Straight Bolt, Dark Bronze Finish: 313 Series: MS Deadlock Type: Locks, Cylinders, Cores, Keyblanks...
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    MSRP: $92.00
    $62.23
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  • Adams Rite MS1850S-250-628 MS Deadlock Flat Faceplate 31/32" Backset Hookbolt Adams Rite MS1850S-250-628 MS Deadlock Flat Faceplate 31/32" Backset Hookbolt
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    Adams Rite MS1850S-250-628 MS Deadlock Flat Faceplate 31/32" Backset Hookbolt

    Adams Rite
    MSRP: $92.00
    $62.23
    The Adams Rite MS1850S-250-628 is a heavy-duty MS deadlock designed for aluminum doors and framed glass partitions. This flat faceplate hookbolt lock delivers reliable security for commercial...
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    MSRP: $92.00
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  • Adams Rite MS1850S-250-313 MS Deadlock Flat Faceplate 31/32" Backset Hookbolt Adams Rite MS1850S-250-313 MS Deadlock Flat Faceplate 31/32" Backset Hookbolt
    Quick view

    Adams Rite MS1850S-250-313 MS Deadlock Flat Faceplate 31/32" Backset Hookbolt

    Adams Rite
    MSRP: $92.00
    $62.23
    The Adams Rite MS1850S-250-313 is a heavy-duty aluminum door deadlock designed for commercial and industrial applications requiring reliable access control. Its hookbolt mechanism and flat faceplate...
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    Qty in Cart: 0
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    MSRP: $92.00
    $62.23
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  • Adams Rite MS1850S-210-628 MS Deadlock Flat Faceplate 31/32" Backset Straight Bolt Adams Rite MS1850S-210-628 MS Deadlock Flat Faceplate 31/32" Backset Straight Bolt
    Quick view

    Adams Rite MS1850S-210-628 MS Deadlock Flat Faceplate 31/32" Backset Straight Bolt

    Adams Rite
    MSRP: $92.00
    $62.23
    The Adams Rite MS1850S-210-628 is a heavy-duty aluminum deadlock designed for commercial aluminum framed doors. Its flat faceplate and straight bolt mechanism provide reliable security for office...
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    Qty in Cart: 0
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    Price:
    MSRP: $92.00
    $62.23
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  • Adams Rite MS1850S-210-313 MS Deadlock Flat Faceplate 31/32" Backset Straight Bolt Adams Rite MS1850S-210-313 MS Deadlock Flat Faceplate 31/32" Backset Straight Bolt
    Quick view

    Adams Rite MS1850S-210-313 MS Deadlock Flat Faceplate 31/32" Backset Straight Bolt

    Adams Rite
    MSRP: $92.00
    $62.23
    MS1850S-210-313 Adams Rite Aluminum Door Deadlocks MS Deadlock, Flat Faceplate, 31/32" Backset, Straight Bolt, Dark Bronze Finish: 313 Series: MS Deadlock Type: Locks, Cylinders, Cores, Keyblanks...
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    Qty in Cart: 0
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    MSRP: $92.00
    $62.23
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  • Adams Rite MS1850S-150-628 MS Deadlock Flat Faceplate 7/8" Backset Hookbolt Adams Rite MS1850S-150-628 MS Deadlock Flat Faceplate 7/8" Backset Hookbolt
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    Adams Rite MS1850S-150-628 MS Deadlock Flat Faceplate 7/8" Backset Hookbolt

    Adams Rite
    MSRP: $108.00
    $72.87
    The Adams Rite MS1850S-150-628 is a professional-grade aluminum deadlock designed for aluminum storefront and framed glass doors. Its hookbolt mechanism and flat faceplate provide reliable security...
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    MSRP: $108.00
    $72.87
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  • Adams Rite MS1850S-110-628 MS Deadlock Flat Faceplate Adams Rite MS1850S-110-628 MS Deadlock Flat Faceplate
    Quick view

    Adams Rite MS1850S-110-628 MS Deadlock Flat Faceplate

    Adams Rite
    MSRP: $108.00
    $72.87
    This is a replacement flat faceplate component for Adams Rite MS Deadlock units with 7/8" backset and straight bolt configuration. The faceplate is precision-manufactured in aluminum to match OEM...
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    MSRP: $108.00
    $72.87
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  • Adams Rite MS1847-11-630 MS Deadlock 45° Hub Angle Adams Rite MS1847-11-630 MS Deadlock 45° Hub Angle
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    Adams Rite MS1847-11-630 MS Deadlock 45° Hub Angle

    Adams Rite
    MSRP: $86.00
    $58.44
    The Adams Rite MS1847-11-630 is a self-latching deadlock/deadlatch designed for aluminum door frames requiring a 45-degree hub angle connection. This round-face lock delivers reliable security for...
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    MSRP: $86.00
    $58.44
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  • Adams Rite MS1847-09-630 MS Deadlock, 22.5° Round Face Adams Rite MS1847-09-630 MS Deadlock, 22.5° Round Face
    Quick view

    Adams Rite MS1847-09-630 MS Deadlock, 22.5° Round Face

    Adams Rite
    MSRP: $86.00
    $58.44
    The Adams Rite MS1847-09-630 is a heavy-duty aluminum door deadlock designed for commercial and institutional applications requiring reliable locking on narrow-stile glass and aluminum doors. The MS...
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    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $86.00
    $58.44
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