M Series Mortise Lock

Mortise Lock
Heavy Duty



  • M Series is a heavy duty commercial mortise lock, all bolts are made of stainless steel, most working parts inside the case are made of high strength steel alloy. It is UL listed for 3-Hour fire rating, it also meets or exceeds the ANSI A156.13 Grade 1 specification.
  • The lock case has a dimension of 3 5/8″ (92mm) center cylinder to spindle, which enable the lock to retrofit most of manufacturers’ mortise lock, without or with a little modification to the drill hole of door, offering like for like replacement capabilities.
  • The lock case is non-handed, reversibility without disassembling the lock case allowing for a full compliment of functions. A single lock case for all trims allows excellent trim design combination flexibilities.
  • Extra ordinary feature of this lock is the lever or knob retained by lever/knob keeper. Material of lever can be optional for either forged solid brass or lower cost pressure zinc cast; rose and escutcheon are snap-on. Steps of installation are minimal, fast and easy as a cylindrical lock.

A Cylinder to spindle center is 3-5/8” (92mm) which enables retrofit in most manufacturers’ mortise locks.

B Varied sectional and escutcheon trim options available to meet different needs and preferences.

C High-precision standard or I/C cylinders offer high security and reliability.

D Solid brass or pressure zinc cast lever retained by knob keeper, outside lever cannot be removed from outside.

E Spring cassette design enhances protection against lever sagging, providing a firm and positive horizontal lever return position.

F Spindle designed to break when an excessive force is applied, thus protecting the lock case from further damage.

G Working parts are made of high-strength steel alloy.



ApplicationsFor commercial and institutional buildings where the finest mortise locks are required.
CertificationsANSI A156.13 Series 1000, Grade 1 operational and security. UL Listed for 3-Hour fire rating.
Case Size4 5/16" x 6" x 1" (110 mm x 152 mm x 25 mm).
Armor Front1 1/4" x 8" x 7/32" (32 mm x 203 mm x 5 mm) Standard, 1 1/16" x 8" x 7/32" (27 mm x 203 mm x 5 mm) optional.
Backset2 3/4" (70 mm) only.
Door PreparationConforms to ANSI A115.1.
Door Range1 3/8" (35mm) to 2 1/2" (64 mm) Steel door.
Beveled DoorsSelf-adjusting case.
Spacing3 5/8" (92 mm) Center cylinder to spindle. 2 7/16" (62 mm) Center thumbturn to spindle.
Deadbolt1" (25 mm) Throw, stainless steel.
Latchbolt3/4" (19 mm) Throw, with anti-friction tongue, all stainless steel.
Deadlocking BarNon-handed, stainless steel.
Case HandingField reversible without removing case.
Through BoltsThrough-bolted trim self-align with lock case.
StopworksIncorporated into thumbturn.
StrikeCurved lip non-handed. Custom lip lengths at 1/8" (3 mm) increments available.
SpindlesBreakable to prevent the lock case from unlocking or being damaged.
Cylinder6-pin cylinder standard, with two nickel silver keys, "C" keyway. Can be masterkeyed or grand masterkeyed, construction key system available.
I/C Core6 or 7-pin, compatible with Best? and Falcon.?
Cylinder GuardTapper cylinder guard with tension spring to resist wrenching of cylinder.
Trim DesignsLevers/Knobs forged solid brass or lower cost pressure zinc cast, attached to rose plate/escutcheon. Outside lever/knob cannot be removed from outside. Inside lever/knob can be snapped in place. Return spring in trim to enhance protection against lever droop, providing a firm and positive return of lever to horizontal.
Roses2 7/16" (62 mm) Diameter, positive friction attachment.
Escutcheons1 15/16" x 8" (50 mm x 203 mm), positive friction attachment.
FastenersConcealed under the rose/escutcheon.
Trim CombinationsAvailable with lever both sides, knob both sides, or knob x lever with rose or escutcheon both sides.
Finishes605, 606, 611, 612, 613, 625, 626, 629, 630

MD Deadlock



Certification• ANSI/BHMA A156.36 Grade 1, UL Listed for 3-Hour fire rating.
Case• Heavy wrought steel with zinc dichromate finish. 4-5/16" x 3-9/16"
x 1" (110 mm x 90 mm x 25 mm).
Backset• 2-3/4" (70 mm) only.
Door Range• 1-3/8" (35mm) to 2-1/2" (64 mm) Steel door, 1-3/4" (45mm) to
2-1/2" (64mm) wood door.
Beveled Doors• Self-adjusting case.
Deadbolt• 1" (25 mm) Throw, stainless steel.
Handing• All functions are reversible.
Strikes• 1-1/8" (28mm) x 3-1/2" (89mm), no lip, furnished with dust box.
Cylinder• 6-pin standard, with two nickel silver keys, "C" keyway. Can be
masterkeyed or grand masterkeyed. Construction key system
I/C Core• 6 or 7-pin, compatible with Best® and Falcon®.