BEST 45H Series Heavy Duty Mor...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,368.00
$847.78
BEST BEST 45H Series (A - Office Function) - Rose Trim Heavy Duty Mortise Lock, Single Keyed BES-45H-A-RS

BEST 45H Series Heavy Duty Mortise Lock with Office Function and Rose Trim

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Model: 45H7A15H626
$1,368.00
$847.78
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,368.00
$847.78
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BEST 45H Series Heavy Duty Mortise Lock with Office Function and Rose Trim

Professional Grade Mortise Lock Solution for Commercial Applications

The BEST 45H Series Heavy Duty Mortise Lock delivers commercial-grade security with office function operation and rose trim design. Featuring a solid one-piece stainless steel anti-friction latch with 3/4" throw and 1" deadbolt throw, this mortise lock provides superior strength with 2-3/4" backset configuration. The 0.095" cold rolled steel case construction meets ANSI A156.13 Series 1000 Grade 1 Operation and Strength standards for demanding commercial applications.

Professional Features & Benefits

  • Heavy-Duty Case Construction: 0.095" cold rolled steel case measuring 5-7/8" H x 7/8" D x 4-1/16" W with zinc dichromate plating for superior corrosion protection and durability.
  • Enhanced Latch Performance: Solid one-piece stainless steel anti-friction latch provides 50% more surface contact with strike for superior strength and security with oil-impregnated operation.
  • Reversible Field Configuration: Latch rotates 180 degrees for easy handing change without opening case, and four position hub toggle design allows field configuration of lock/unlock states.
  • Armored Front Protection: Completely surrounds latch and deadbolt providing increased lateral strength with staked assembly design for self-alignment during installation.
  • Roller Bearing Hub Mechanism: Provides smooth, wear-resistant operation with lever return spring mechanism located in trim for enhanced protection against lever droop.
  • ANSI Grade 1 Compliance: Meets ANSI A156.13 Series 1000 Grade 1 Operation and Strength, Grade 2 Security standards for commercial applications.
  • Cylinder Security Features: Solid machined cylinder rings with wavy washer provides resistance to wrenching, plus cylinder security screw prevents removal without first removing interchangeable core.
  • Anti-Microbial Options: Available with UltraShield antimicrobial protected coating in 626AM and 630AM finishes for healthcare and high-cleanliness applications.

Technical Specifications

45H Series –The design and operation of the BEST® mortise lock meets the intent
of the standard for ANSI A117.1 section 404.2.6.
Builders Hardware Manufacturers Association:
45H Series –ANSI A156.13, Series 1000, Grade 1 Operation and Strength, Grade 2 Security. To meet Grade 1 Security, a drill resistant core
(1CD, 1CDP, 1CDF, or 1CDX) must be used with escutcheon trims, and 1EK7K4 high security cylinder must be used with sectional trims.
47H Series – ANSI A156.13, Series 1000, Grade 1 Operational, Strength, and Security

Auxiliary bolt – Stainless steel, non-handed.
Backset – 2-3/4"
Case –0.095” cold rolled steel, 5- 7/8" H x 7/8" D x 4-1/16" W. Steel is zinc dichromate plated for corrosion protection.
Deadbolt – Stainless steel, 1" throw.
Latchbolt –Solid stainless steel, 3/4" throw. Latch is oil-impregnated for anti-friction operation. Reversible without opening case.
Strike – For complete strike package spec’s see page 5.
Door Thickness – Standard lock configuration designed for doors 1-3/4" thick. Thick door configuration available for doors up to
5" thick (specify thickness when ordering).
Faceplate –Stainless steel, brass or bronze material, 8" H x 1-1/4" W x 1/16" T. Lock face automatically adjusts to proper bevel during
installation.
Products protected by one or more of the following patents: 4,873,853 5,590,555 5,794,472
Finishes –
• 605 - bright brass, clear coated
• 606 – satin brass, clear coated
• 611 – bright bronze, clear coated
• 612 – satin bronze, clear coated
• 613* – oxidized satin bronze, oil rubbed
• 618 – bright nickel plated, clear coated (brass base material)
• 619 – satin nickel plated, clear coated (brass base material)
• 622 – flat black coated (brass base material) 625 – brightchromium plated (brass base material)
• 626 – satin chromium plated (brass base material)
• 629 – bright stainless steel
• 630 – satin stainless steel
• 690* – dark bronze coated (brass base material)
*613 finish is designed to wear over time, providing an “antique” appearance.
*690 finish will continue as a dark brown appearance over time.
Antimicrobial Finish –
• 626AM – satin chrome plated with UltraShield™ antimicrobial protected coating
• 630AM – satin stainless steel with UltraShield™ antimicrobial protected coating
The BEST UltraShield finish inhibits the growth of bacteria and other microbes on the surface of the hardware.
NOTE: BEST UltraShieldTM option is recommended for use on any hardware application where product cleanliness is a high priority. i.e;.
Hospital/Healthcare, Elderly Care, Education, Transportation, Food-Service, Hospitality.

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness (standard 1-3/4" or up to 5" thick door configuration), mortise pocket dimensions, and handing requirements.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for proper backset and faceplate positioning.
  3. Prepare door mortise pocket and drill required holes for cylinder, trim mounting, and through-bolts per manufacturer specifications.
  4. Install case assembly into mortise pocket and secure with provided screws, ensuring armored front self-aligns with door bevel during installation.
  5. Install cylinder, trim components, and strike hardware according to manufacturer torque specifications and alignment requirements.
  6. Test lock operation including latch and deadbolt function, key operation, and lever return to verify proper installation and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Government and Municipal Buildings
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Hospitality and Hotel Properties

Why Choose BEST Quality?

BEST 45H Series mortise locks deliver professional-grade reliability with 0.095" cold rolled steel construction and solid stainless steel latch components engineered for demanding commercial applications. The roller bearing hub mechanism and anti-friction latch design provide enhanced cycle life with reduced wear, while ANSI Grade 1 compliance ensures dependable performance where security and durability are essential.

Product Specs

Series:
45H
Standard Cylinder:
SFIC Prep Less Core
Duty Level:
Heavy Duty
Keyed Function:
Single Cylinder
Product Group:
Mechanical Locks
Product Subgroup:
Mortise Locks and Trim
Product Type:
Mortise Locks
Subcategory:
Mortise
Keyed:
Yes
Commercial/Residential:
Commercial
Lock Type:
Mortise
Product Attribute:
Mortise Locks
Electronic:
No
Face Plate:
8" H x 1-1/4" W x 1/16" T
Product Category:
Mechanical Locks
Backset (Distance):
2-3/4"
Department:
Door Hardware

BEST 45H7A15H626 – Frequently Asked Questions

1) Will the BEST 45H mortise lock fit a 1-3/4 inch door?
Yes. The standard 45H lock configuration is built for 1-3/4 inch doors, which is the usual commercial thickness. If your opening is thicker, BEST makes a thick door configuration good up to 5 inches, but you have to specify the thickness on the order; it isn't a field adjustment. Mortise pocket is cut for a 2-3/4 inch backset and the faceplate runs 8 x 1-1/4 x 1/16 inches.
2) What does office function mean on a BEST 45H lock, and is it the right function for a tenant suite door?
Office function on the 45H means the outside lever can be locked or unlocked by key, and the inside lever always retracts the latch for free egress. There's also a 1 inch throw deadbolt operated separately. For a tenant suite entry, an office building corridor door, or a shop door that gets unlocked in the morning and locked at close, that's the function you want. If you need a door that stays locked at all times and is only entered by key, storeroom function is the right call instead, like the Cal-Royal NM8080 or the Accentra 8805FL. For a classroom you'd want classroom function, such as the Corbin Russwin ML2003.
3) Does the BEST 45H mortise lock come with a cylinder or core?
No core is included. The 45H ships with an SFIC prep, less core, so you supply the BEST small format interchangeable core keyed into your existing system. That's the point of the design for a building already on BEST keying, you drop your core in and the lock is on the master system same day. Note the cylinder security screw won't allow cylinder removal until the core comes out first.
4) Is the BEST 45H handed, and can I change the hand in the field?
Handing isn't a problem here. The latchbolt rotates 180 degrees so you can flip the hand without ever opening the lock case, and the auxiliary bolt is non-handed. The lock face self-adjusts to the door bevel as you install it. Order one part number and it works on either hand of the opening.
5) Will the BEST 45H latch into the strike that's already in my frame?
The 45H uses a 3/4 inch latchbolt throw with a 1 inch deadbolt throw, on a 2-3/4 inch backset, which is standard ANSI mortise geometry. If the existing strike is an ANSI mortise strike with the deadbolt cutout, the bolts will engage. If your old lock was a 2-3/8 inch backset or a cylindrical lockset, the frame prep and door prep are both different and you'll be replacing the strike as well. The one piece stainless latch is deliberately larger, it gives about 50 percent more contact surface with the strike than a standard latch.
6) What ANSI grade is the BEST 45H mortise lock rated?
ANSI A156.13, Series 1000, Grade 1 for Operation and Strength, Grade 2 for Security. To reach Grade 1 Security you have to pair it correctly: a drill resistant core (1CD, 1CDP, 1CDF or 1CDX) with escutcheon trim, or the 1EK7K4 high security cylinder with sectional trim. If your spec calls for Grade 1 security straight out of the box, BEST's 47H series carries Grade 1 for Operational, Strength and Security. The design also meets the intent of ANSI A117.1 section 404.2.6.
7) What do I need to specify when ordering a BEST 45H office function lock?
Four things beyond the function. Trim style, which is H for a 2-3/4 inch flat rose, R for a 2-3/4 inch concave rose, or S for a 3-1/2 inch flat rose. Lever style, from seven choices: Curved with Return, Curved without Return, Contour with Angle Return, Gull Wing, 3 solid tube with return, 12 solid tube without return, or 4 round knob. Finish, fourteen options. And door thickness if the door is anything other than 1-3/4 inches. Cores are ordered separately.
8) What is a Grade 1 mortise office function lock that can replace a BEST 45H office lock?
The Cal-Royal NM8050 is a heavy duty Grade 1 mortise lockset with an entrance/office function and an auxiliary deadlatch, sized for 1-3/4 inch doors. The BEST 45H is a heavy duty Grade 1 mortise lock with a 2-3/4 inch backset whose standard configuration is designed for 1-3/4 inch doors, so the two line up on door thickness and grade. The difference that matters when you specify: the 45H ships with SFIC prep less core, so it takes a small format interchangeable core in an existing key system, while the NM8050 is an entrance/office lockset without that SFIC-prep designation. The Hager 3850E 3800 Series is another Grade 1 office mortise lock with a 2-3/4 inch backset, though it is a non-keyed office lock with escutcheon trim and covers doors from 1-3/4 to 2-1/2 inches thick.
9) The opening needs to stay locked at all times with key access only - what mortise lock should I use instead of an office function?
Office function lets the lever be left unlocked, which is wrong for a door that has to stay secure around the clock. For that opening, the Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series with an Arcadia lever, and the Cal-Royal NM8080 is a heavy duty Grade 1 storeroom mortise lockset with an interchangeable core option for 1-3/4 inch doors. The BEST 45H itself is a heavy duty commercial mortise lock with a 2-3/4 inch backset, single cylinder keyed, so if you are standardizing on 45H trim and keying across a building, the storeroom peers are the function change, not a hardware platform change.
10) Can I use a cylindrical lock instead of the BEST 45H mortise lock?
Only if the door is not already mortised. The BEST 45H is a mortise lock and drops into a mortise pocket, while the Schlage PC10 is a Grade 1 passage cylindrical lock, non-keyed with rose, for 1-3/4 inch doors - a bored prep, not a mortise pocket. A door cut for a mortise case cannot take a cylindrical lock without a filler or a new door, and a bored door cannot take the 45H without mortising it. Decide the prep first, then the function.
11) Which mortise locks match the 45H 2-3/4 inch backset, and which do not?
The BEST 45H uses a 2-3/4 inch backset. Among mortise peers, the Hager 3800 Series carries the same 2-3/4 inch backset across the 3810S passage with rose, the 3810E passage with escutcheon, the 3840S privacy, and the 3850E office with escutcheon, and the Sargent 4874 double cylinder mortise deadbolt is also a 2-3/4 inch backset. Baldwin's mortise lock bodies run a 2-1/2 inch backset - the 6301 entry/apartment and the 6310 entry/storeroom, in both knob by knob and lever by lever - so those are not a drop-in against a door prepped for 2-3/4 inch. Check the existing cutout before ordering across brands.
12) What mortise lock should I specify for a behavioral health or patient room instead of a lever lockset?
Lever trim is a ligature point in those rooms. The TownSteel MRX-L-01 is a Grade 1 heavy duty anti-ligature lever mortise lockset in stainless steel with passage function for 1-3/4 inch doors, and the MRX-A-01 is the same passage function with a ligature resistant arch trim in satin stainless steel. For a push/pull opening, the Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset, ligature resistant and ADA compliant in satin stainless steel. The BEST 45H offers lever styles including curved with and without return, contour with angle return, and gull wing, plus 626AM and 630AM UltraShield antimicrobial finishes for healthcare openings that do not require ligature resistance.
13) Is there an antimicrobial version of the BEST 45H for a hospital or care facility?
Two finishes carry the UltraShield antimicrobial coating: 626AM, satin chrome, and 630AM, satin stainless. The coating inhibits bacterial and microbial growth on the hardware surface. BEST calls it out for hospital and healthcare, elderly care, education, transportation, food service and hospitality. If you're standardizing a wing, spec 630AM and it will visually match the plain 630 satin stainless on adjacent openings.
14) Can the lever be set to stay locked or unlocked without a key on a BEST 45H?
The hub uses a four position toggle, so the lock and unlock state of each side can be set in the field without swapping the lock. That's how a facilities crew reconfigures an opening after a tenant change rather than reordering a different function. The lever return spring sits in the trim rather than the case, which is what keeps levers from drooping on a high traffic door, and the hub runs on roller bearings.
15) How do I choose between rose trim and escutcheon trim on a BEST 45H mortise lock?
Rose trim is a compact round plate around the lever, and the 45H offers it in a 2-3/4 inch flat, a 2-3/4 inch concave, or a 3-1/2 inch flat. Escutcheon is the long plate. It matters beyond looks: the Grade 1 security upgrade path differs, a drill resistant core gets you there with escutcheon trims, while sectional trims need the 1EK7K4 high security cylinder. Rose is usually the pick when you're matching existing rose trim on the other openings or the door has a narrow lite stile.
16) Is there an electronic or keypad version if I want to get rid of keys on this opening?
The BEST 45H is a purely mechanical, keyed mortise lock, no electronics in it. If the goal is credential or code access on a mortise prep, ZenSupply carries Grade 1 electronic mortise locks that use the same style of door prep: the TownSteel FME-2000 Series with RFID for 1-3/4 inch doors, the Alarm Lock DL3500 Trilogy with 300 user codes, or the Schlage LEMD-GRW ENGAGE wireless mortise lock with a 125kHz proximity reader. For a hardwired electrified lever, the Command Access ML190 runs on 24VDC with field selectable fail safe or fail secure.
17) Is a restroom door a job for the 45H office function lock or something else?
A restroom or bedroom door needs privacy function, which the BEST 45H office function does not provide. The Cal-Royal NM8440 is a heavy duty Grade 1 privacy mortise lockset with a deadbolt for 1-3/4 inch doors, and the Hager 3840S is a Grade 1 privacy mortise lock with a 2-3/4 inch backset covering 1-3/4 to 2 inch doors. The 3840S matches the 45H 2-3/4 inch backset, so the door prep carries over on a like-for-like swap in the same building.
18) The door does not need to lock at all - is there a simpler mortise option than a keyed 45H?
Yes. For a corridor, hall, or closet door with no locking requirement, the Falcon MA101 is a Grade 1 heavy duty mortise passage lock in the MA Series with field reversible operation and a fire rating, and the Schlage PM010 is a Grade 1 passage latch mortise lock, non-keyed, for 1-3/4 inch doors. Hager offers passage in both trim styles: the 3810S is a Grade 1 passage mortise lock with rose and a 2-3/4 inch backset, and the 3810E is the same function with escutcheon, both covering 1-3/4 to 2-1/2 inch doors. The BEST 45H is keyed with a single cylinder and comes with SFIC prep less core, so specifying it for a passage opening means buying and keying a cylinder you will not use.
19) I need credential or keypad access on the door - what mortise lock replaces a mechanical 45H?
The BEST 45H is a non-electronic mechanical mortise lock, so credential access means a different lock body. Options that keep the mortise prep: the TownSteel FME-2000 is a Grade 1 heavy duty classroom mortise lockset with RFID technology for 1-3/4 inch doors; the Schlage CO-100 is a standalone electronic mortise lock in the CO Series with a keypad reader, Grade 1, heavy duty, privacy function, for 1-3/4 inch doors; and the Schlage Electronics LEMD-GRW is a Grade 1 ENGAGE Series wireless mortise lock with a 125kHz proximity reader and a 3 hour fire rating. Each brings its own power, credential, and management requirements that a mechanical 45H does not have.
20) Will a mortise deadbolt or a mortise thumbturn work in place of the 45H?
No - those are different devices for a mortise pocket, not substitutes for a latching lockset. The Sargent 4874 is a double cylinder mortise deadbolt and the Kaba Ilco 185 Series is a mortise lock with a deadbolt function and no handing; a deadbolt secures the door but gives you no latch and no lever operation. The Sargent 130KB and 130W are mortise thumbturns, standard duty trim pieces for the 8200 and 7800 Series respectively. The BEST 45H is a keyed single cylinder mortise lockset with a 3/4 inch throw stainless latchbolt and a 1 inch deadbolt throw in one case, which is why it operates the door and a deadbolt alone does not.
21) What looks like a mortise entrance lock but will not actually secure the door?
Dummy trim. The Emtek 3019 Brisbane, 3102 Memphis, 3104 Hamilton, and 3106 Manhattan are all mortise entrance locksets in dummy function, and the Schlage L0170 is a Grade 1 heavy duty half dummy trim in the L Series for 1-3/4 inch doors. They carry the look of a mortise entrance set with no working latch. The BEST 45H is a keyed single cylinder mortise lock with a stainless steel latchbolt and a 1 inch deadbolt throw, so pair a dummy only on the inactive leaf and put the 45H on the leaf that has to operate.
22) The dormitory door needs a deadbolt that retracts when someone exits - what mortise lock covers that?
The Sargent 7925 is a Grade 1 heavy duty dormitory exit function mortise lock in the 7900 Series with rose trim and a single cylinder deadbolt, listed for corridor/dormitory use. That is the function to specify when the inside lever must retract the deadbolt for egress. The BEST 45H is a heavy duty commercial mortise lock with a 1 inch stainless deadbolt throw and is offered with rose trim in 2-3/4 inch flat, 2-3/4 inch concave, and 3-1/2 inch flat, but its office function does not carry the dormitory exit behavior.
23) I need the mortise lock tied into an access control panel - what do I use instead of a mechanical 45H?
For an electrified opening, the Command Access ML190 Series is a heavy duty motorized mortise lock with field selectable EL and EU operation and 24VDC power, storeroom function - the field selectable fail safe or fail secure choice matters when the door is on a fire alarm interface. The Schlage L9092EU with 03A trim is a heavy duty electric lock/unlock outside lever mortise lock, keyed outside, with request to exit and 12/24VDC, corridor function, for 1-3/4 inch doors. The BEST 45H is non-electronic, so it holds no power transfer or REX signal and cannot report door status back to a panel.
24) For a hotel or multifamily room door, what mortise options sit alongside a mechanical office function lock?
For guest room and apartment doors, the Dormakaba Saffire LX-I-M002 is an electronic RFID mortise lockset with BLE mobile access at BHMA Grade 2, the Dormakaba E-Plex E5086 is a Grade 1 entry/egress electronic pushbutton and card back to back mortise lock, and the Schlage Electronics LEBMB-ADD is a Grade 2 mobile-enabled mortise lock with push button and LED covering privacy, office, and apartment functions on 1-3/4 inch doors with a 3 hour fire rating. On the mechanical side, the Baldwin 6301 is an entry/apartment mortise lock body in knob by knob or lever by lever for doors 1-3/4 inch and over. The BEST 45H is the mechanical commercial route, keyed single cylinder with SFIC prep less core so the property's existing core system carries into the room.
25) Can I match BEST 45H locks to the door closers and pulls already on my building?
Fourteen finishes are offered, so matching an existing package is usually straightforward: 605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 613 oxidized satin bronze oil rubbed, 618 bright nickel, 619 satin nickel, 622 matte black, 625 bright chrome, 626 satin chrome, 630 satin stainless, 690 statuary dark bronze, plus 626AM and 630AM antimicrobial. Two behave differently over time on purpose: 613 wears to an antique look, and 690 stays a dark brown. If the rest of the building is 626 or 630, those are the two that dominate commercial work.
How fast can I get the BEST 45H7A15H626 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the BEST 45H7A15H626 come with a warranty?
Absolutely. The BEST 45H7A15H626 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the BEST 45H7A15H626?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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