BEST 45H Series Heavy Duty Mor...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,369.00
$847.78
BEST BEST 45H Series (AT - Office Function) - Rose Trim Heavy Duty Mortise Lock, Single Keyed BES-45H-AT-RS

BEST 45H Series Heavy Duty Mortise Lock with Rose Trim - Office Function Single Cylinder

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Model: 45H7AT15H626
$1,369.00
$847.78
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,369.00
$847.78
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BEST 45H Series Heavy Duty Mortise Lock with Rose Trim - Office Function Single Cylinder

Professional Grade 1 Mortise Lock Solution

The BEST 45H Series Heavy Duty Mortise Lock delivers commercial-grade security with office function operation and elegant rose trim design. Engineered with a solid one-piece stainless steel anti-friction latch providing 50% more surface contact with strike, this Grade 1 mortise lock features 2-3/4" backset and is designed for doors 1-3/4" thick. The lock meets ANSI A156.13 Series 1000 Grade 1 Operation and Strength standards with Grade 2 Security rating for demanding commercial applications.

Professional Features & Benefits

  • Enhanced Latch Design: Solid one-piece stainless steel anti-friction latch provides 50% more surface contact with strike for superior strength and security with precision-engineered curve for enhanced cycle life.
  • Heavy-Duty Construction: Case, cover, and armored front manufactured from 0.095" cold rolled steel with zinc dichromate plating for exceptional durability and corrosion protection.
  • Grade 1 Performance: ANSI A156.13 Series 1000 Grade 1 Operation and Strength certification with Grade 2 Security rating for commercial applications.
  • Reversible Operation: Non-handed design with reversible latch that rotates 180 degrees for easy handing change without opening case, plus four position hub toggle design.
  • Roller Bearing Mechanism: Roller bearing hub mechanism provides smooth, wear-resistant operation with lever return spring mechanism in trim for enhanced protection against lever droop.
  • Armored Front Protection: Completely surrounds latch and deadbolt providing increased lateral strength with staked assembly design for self-alignment during installation.
  • Enhanced Case Integrity: Four case cover screws at each corner plus interlocking armored front and cover design at the latch for maximum structural integrity.
  • 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.

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), 2-3/4" backset, and handing as applicable to this product.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for mortise lock preparation.
  3. Prepare door and frame by drilling required holes and routing mortise cavity as specified in manufacturer instructions for proper lock body fit.
  4. Install lock body in mortise cavity and secure with provided mounting hardware per manufacturer torque specifications, ensuring armored front self-aligns with door bevel.
  5. Install rose trim assembly and adjust operational components including four position hub toggle for proper alignment, latching, and smooth lever operation throughout full range of motion.
  6. Test lock operation including latch and deadbolt function, verify proper cylinder operation, 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
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose BEST Quality?

BEST 45H Series mortise locks deliver professional-grade reliability with 0.095" cold rolled steel construction and solid stainless steel components engineered for demanding commercial applications. The precision roller bearing hub mechanism and enhanced case integrity design with four corner screws ensure dependable performance where security and durability are essential. ANSI A156.13 Grade 1 certification and anti-friction latch technology provide the professional-grade performance required for high-traffic commercial environments.

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 45H7AT15H626 – Frequently Asked Questions

1) Will the BEST 45H mortise lock fit a 1-3/4 inch door?
Yes, 1-3/4 inches is the standard configuration for the 45H mortise lock. Thicker openings are handled by a separate thick-door build that covers doors up to 5 inches, and you have to state the actual door thickness on the order. Backset is 2-3/4 inches, so the door needs the standard commercial mortise pocket at that backset.
2) Do I need to order the BEST 45H handed, or can I change the hand on site?
Order it non-handed. The 45H latch is reversible and rotates 180 degrees to change hand without opening the case, and the auxiliary bolt is non-handed as well. The four position hub toggle handles the function side. That is the practical difference from most electronic mortise locks, which are handed at the factory.
3) What does office function mean on a BEST 45H mortise lock, and is it the right one for a tenant suite door?
Office function means the outside lever can be locked or left free, and the key retracts the latch from outside. It suits a suite entry or an office a tenant wants to secure at will. If you instead want the outside lever locked at all times and key-only entry, that is storeroom function, which on this catalogue is a different lock such as the Cal-Royal NM8080 or the Accentra 8805FL. For a classroom door locked from outside by key, look at the Cal-Royal NM8070 or the Corbin Russwin ML2003.
4) Does the BEST 45H come with a cylinder or core?
No core is included. The 45H ships prepped for a BEST small format interchangeable core, less core, so you supply or key the core separately from your existing SFIC system. That is what lets a property manager fold the door into a master key system already in the building. Note that the cylinder security screw cannot be removed until the core is pulled first.
5) Will the BEST 45H latch into the strike that's already in my frame?
The latchbolt throws 3/4 inch and the deadbolt throws 1 inch, at a 2-3/4 inch backset, which is the standard ANSI mortise arrangement. If the existing frame carries an ANSI mortise strike at that backset, it lines up. The lock face self-adjusts to the door bevel during installation, so a beveled edge is not a problem. Faceplate is 8 x 1-1/4 x 1/16 inches, so check that against the routed pocket in the door edge before you order.
6) What is the closest Grade 1 mortise office lock to the BEST 45H if the BEST is not the right fit?
The Cal-Royal NM8050 is a heavy duty Grade 1 mortise lockset in an entrance/office function for 1-3/4 inch doors, which is the same door thickness the standard BEST 45H configuration is designed for. The Hager 3850E is also a Grade 1 office mortise lock with a 2-3/4 inch backset, matching the 45H backset, though the 3850E is a non-keyed office lever on escutcheon trim while the 45H office function is single cylinder keyed. If the opening needs a key in the outside lever, the NM8050 is the closer match on function.
7) What mortise lock replaces an office function lock on a storeroom door that must always stay locked?
For a storeroom opening, the Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series supplied with an Arcadia lever, and the Cal-Royal NM8080 is a heavy duty Grade 1 storeroom mortise lockset for 1-3/4 inch doors with an interchangeable core option. The interchangeable core option on the NM8080 is worth noting if the building is already keyed on small format cores, since the BEST 45H ships prepped for a small format interchangeable core less core.
8) Can a Baldwin 6301 or 6310 mortise lock body go in the same door prep as a BEST 45H?
No. The Baldwin 6301 entry/apartment and 6310 entry/storeroom mortise lock bodies are 2-1/2 inch backset, while the BEST 45H is 2-3/4 inch backset. A 2-1/2 inch backset body sets the lever and cylinder a quarter inch closer to the door edge, so the cross bores do not line up and the mortise pocket does not transfer. Baldwin lists the 6301 for doors 1-3/4 inch and over and the 6310 for doors 1-3/8 inch and over, and both come knob by knob or lever by lever - the 6301LS and 6310190RRLS are the lever versions.
9) Which parts look like a mortise lockset but will not lock a door on their own?
Several. The Emtek 3019 Brisbane, 3102 Memphis, 3104 Hamilton, and 3106 Manhattan mortise entrance locksets are dummy function - trim only, with no working latch. The Schlage L0170 is a Grade 1 mortise non-keyed half dummy lever trim for 1-3/4 inch doors, and the Falcon MESC600DT is a dummy escutcheon lever trim made for M9900 Series exit devices, not a lock body. Sargent 130KB and 130W are mortise thumbturns - a 130KB from the 8200 Series and a 130W with a round backplate from the 7800 Series - which are cylinder-side trim, not locksets. The BEST 45H office function is a keyed single cylinder mortise lock, so none of these substitute for it.
10) What mortise lock do I use instead if the opening needs a keypad or card credential?
The BEST 45H is a mechanical lock with no electronics. For credential-based access on a mortise prep, the Alarm Lock DL3500CR is a Grade 1 Trilogy electronic mortise lock with 300 user codes in a classroom function for doors 1-5/8 inch to 1-7/8 inch; the Schlage CO-100 is a Grade 1 heavy duty standalone electronic mortise lock with a keypad reader in privacy function for 1-3/4 inch doors; and the TownSteel FME-2000 is a Grade 1 heavy duty classroom mortise lockset with RFID technology for 1-3/4 inch doors. The Accentra nexTouch NTM623-NR is a Grade 1 mortise lock with a capacitive touchscreen keypad and no deadbolt, with cylinder override, if a mechanical key needs to stay in the picture.
11) Is there a mortise lock that can be released from an access control system rather than only by key?
Yes. The Command Access ML190 Series is a heavy-duty motorized mortise lock in a storeroom function with field selectable fail safe or fail secure operation on 24VDC. The Schlage L9092EU with 03A trim is a heavy duty electric lock/unlock outside lever mortise lock in a corridor function, keyed outside, with request to exit, running on 12 or 24VDC for 1-3/4 inch doors. Both need power run to the door, which the mechanical BEST 45H does not.
12) What mortise lockset do I use on a behavioral health or patient room door where a lever is not allowed?
Anti-ligature trim is the substitution. The TownSteel MRX-A-01 is a Grade 1 heavy duty ligature resistant arch trim mortise lockset in satin stainless steel with a passage function for 1-3/4 inch doors, and the MRX-L-01 is the Grade 1 heavy duty anti-ligature lever version, also passage, in stainless steel. For a hospital push/pull opening, the Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset in the 195 Series, ligature resistant and ADA compliant in satin stainless steel. All three are passage function, so they do not replace the keyed office function of the BEST 45H.
13) Which rose trim size should I specify on a BEST 45H, and what lever styles are there?
Three rose options: H is a 2-3/4 inch flat rose, R is a 2-3/4 inch concave rose, S is a 3-1/2 inch flat rose. The larger S rose is the one to pick when you are covering an older prep or scars from previous trim. Lever choices are 12 solid tube with no return, 3 solid tube with return, contour with angle return, curved with return, curved without return, and gull wing, plus a 4 round knob if you are matching existing knob hardware.
14) Is there an antimicrobial finish option on the BEST 45H for a healthcare corridor?
Two: 626AM, satin chrome with UltraShield antimicrobial coating, and 630AM, satin stainless steel with UltraShield. The coating inhibits growth of bacteria and other microbes on the hardware surface, and BEST calls it out for hospital and elderly care, education, transportation, food service and hospitality work. Standard 626 and 630 are the same appearance without the coating.
15) My levers keep drooping on the doors I'm replacing. Does the BEST 45H address that?
The 45H puts the lever return spring in the trim rather than relying on the case spring alone, which is what guards against lever droop on a high traffic opening. The hub runs on roller bearings for wear resistance, and the latch is oil impregnated solid stainless with a precision curve for cycle life. Case integrity comes from four cover screws, one at each corner, plus an armored front that interlocks with the cover at the latch.
16) Is the BEST 45H an electronic lock, and what should I look at if I want keypad or credential access on the same door?
No, the 45H is a mechanical keyed mortise lock, no power and no credentials. Where you need electronic access on a mortise prep, ZenSupply carries the Alarm Lock DL3500 Trilogy Grade 1 with 300 user codes, the Schlage CO-100 standalone keypad mortise lock, and the TownSteel FME-2000 Grade 1 RFID mortise lockset. Watch the door thickness when you switch: the Alarm Lock DL3500 is listed for 1-5/8 to 1-7/8 inch doors, while the Schlage CO-100 and TownSteel FME-2000 are listed for 1-3/4 inch.
17) Is the BEST 45H mortise lock ADA compliant for a barrier-free opening?
BEST states the design and operation of the mortise lock meets the intent of ANSI A117.1 section 404.2.6, the accessible door hardware operation clause. Pair that with one of the lever trims rather than the 4 round knob, since a knob is not an accessible operating device.
18) I need a mortise lock for a restroom or bedroom door - what takes the place of a keyed office lock?
A privacy function is the right part for those openings. 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 for doors 1-3/4 inch to 2 inch. The Hager shares the 2-3/4 inch backset the BEST 45H uses, so an existing mortise pocket prepped at that backset carries over.
19) Is there a simpler non-keyed mortise lock if the door does not need a cylinder at all?
Yes. The Schlage PM010 is a Grade 1 non-keyed passage latch mortise lock for 1-3/4 inch doors, and the Falcon MA101 is a Grade 1 heavy-duty mortise passage lock in the MA Series with field reversible operation and a fire rating. The Hager 3810S is a Grade 1 passage mortise lock with rose trim and a 2-3/4 inch backset for doors 1-3/4 inch to 2-1/2 inch, which keeps both the rose trim style and the backset of the BEST 45H while dropping the cylinder.
20) What is the difference between a mortise lock with rose trim and one with escutcheon trim when picking a replacement?
Rose trim uses a separate round plate behind the lever; escutcheon trim uses a single tall plate covering both lever and cylinder. The BEST 45H rose trim comes as a 2-3/4 inch flat rose, a 2-3/4 inch concave rose, or a 3-1/2 inch flat rose. Hager builds the same 3800 Series function both ways: the 3810S is the passage version with rose and the 3810E is the passage version with escutcheon, both Grade 1 with a 2-3/4 inch backset for doors 1-3/4 inch to 2-1/2 inch. If the door already has a large plate cut or paint shadow, the escutcheon version covers it.
21) What mortise lock should go on a dormitory or corridor door where the inside lever needs to lock the outside?
The Sargent 7925 is a heavy duty Grade 1 mortise lock in a dormitory exit function from the 7900 Series, with rose trim and a single cylinder deadbolt. It shares the rose trim approach of the BEST 45H, but the 7925 adds a deadbolt thrown from inside, which is what a dormitory function calls for. The BEST 45H office function does not carry that dormitory exit behavior.
22) For a healthcare or food service door needing an antimicrobial surface, what are the mortise lock options?
The BEST 45H offers two antimicrobial finishes, 626AM satin chrome and 630AM satin stainless steel, both with the UltraShield coating. Among the alternatives, the anti-ligature TownSteel MRX-A-01 mortise lockset is supplied in satin stainless steel and the Marks USA 5PDN hospital passage paddleset is satin stainless steel, but those are passage-function stainless parts rather than a coated antimicrobial finish. If the specification calls out an antimicrobial coating specifically, the 45H in 626AM or 630AM is the one that carries it.
23) If the door only needs a deadbolt and no lever, what mortise option replaces a full lockset?
The Sargent 4874 is a double cylinder mortise deadbolt with a 2-3/4 inch backset, the same backset the BEST 45H uses, so it suits a mortise pocket already cut at that dimension. The Kaba Ilco 185 Series is a deadbolt-function mortise lock with no handing, sold in a single pack. Both are deadbolt only, so a separate pull or passage set is needed anywhere the door must also latch.
24) Is a cylindrical lock an acceptable substitute for a mortise lock on the same door?
They are different door preps and cannot be swapped without changing the door. The BEST 45H is a mortise lock, where the body sits in a routed pocket in the door edge. The Schlage PC10 is a Grade 1 passage cylindrical lock, non-keyed with rose, for 1-3/4 inch doors - a cylindrical lock installs through a round cross bore instead of a mortise pocket. A door already mortised for the 45H would need the pocket filled or the door replaced to accept a cylindrical lock.
25) What are the mortise lock choices for an ornamental iron or thin 1 inch door?
The Marks USA 21AC and 22AC entrance double cylinder ornamental iron mortise locks with round knob are built for 1 inch doors. The BEST 45H standard configuration is designed for 1-3/4 inch doors, with a thick door configuration available up to 5 inch when the thickness is specified at time of order, so it does not go the other direction into a 1 inch iron gate stile.
26) Which mortise locks carry a stated fire rating for a rated opening?
The Falcon MA101 Grade 1 heavy-duty mortise passage lock carries a fire rating, and the Schlage Electronics LEMD-GRW ENGAGE Series Grade 1 wireless mortise lock and LEBMB-ADD mobile-enabled mortise lock both carry a 3 hour fire rating - the LEBMB-ADD at Grade 2. Note the MA101 is passage function and the two Schlage Electronics units are credential-based, so matching a rated opening also means matching the function the door needs.
27) Which mortise lock alternatives fit doors thinner than 1-3/4 inch?
The Alarm Lock DL2700CR classroom Trilogy T2 electronic mortise lock, the DL3500CR classroom electronic mortise lock, and the DL4500 electronic mortise deadbolt are all Grade 1 and all list a 1-5/8 inch to 1-7/8 inch door thickness range, which covers doors slightly under 1-3/4 inch. The DL2700CR also carries a weatherproof design for an exterior opening. The BEST 45H standard configuration targets 1-3/4 inch doors.
28) What mortise lockset handles an intruder-lockdown classroom requirement?
The TownSteel FME-4000 Series is a heavy duty Grade 1 electronic intruder classroom mortise lockset with RFID technology for 1-3/4 inch doors, and the Marks USA LA318GJ is a Grade 1 classroom security indicator mortise lockset for 1-3/4 inch doors that shows lock status on the trim without opening the door. The FME-4000 covers credentialed lockdown; the LA318GJ is the mechanical route with visual confirmation.
29) What is a mortise lock option for a hotel or multi-family door using mobile credentials?
The Dormakaba LX-I-M002 Saffire is an electronic RFID mortise lockset with BLE mobile access at BHMA Grade 2, 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 for 1-3/4 inch doors with a 3 hour fire rating. Both are Grade 2; the BEST 45H is certified to ANSI A156.13 Series 1000 Grade 1 Operation and Strength with a Grade 2 Security rating.
30) Can I standardize the whole building on BEST 45H trim and still match existing finishes?
Fourteen finishes cover most existing suites: 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, 626AM, 630 satin stainless, 630AM, and 690 statuary dark bronze. Two behave differently over time and you should know that before mixing them with new hardware: 613 is built to wear to an antique look, and 690 stays a dark brown.
31) How does the BEST 45H hold up in a corrosive or wash-down area?
Case, cover and armored front are 0.095 inch cold rolled steel with zinc dichromate plating for corrosion protection, and the latchbolt and auxiliary bolt are stainless steel. For the exposed trim, 629 bright stainless or 630 satin stainless are the stainless base finishes rather than plated brass. It is rated heavy duty and specified as commercial hardware.
32) Are there mortise locks that do not need power run to the door but still take a code?
The Dormakaba PowerPlex P2066 Series mortise lock is a PowerPlex 2000 Series unit, and the Dormakaba E-Plex E5086 is a Grade 1 entry/egress electronic pushbutton and card back to back mortise lock in the E-Plex 5X86 Series. The Codelocks CL2255 is a medium duty electronic tubular mortise latch in the CL2000 Series in brushed steel, a lighter-duty choice than the heavy duty BEST 45H. If the door needs no electronics at all, the mechanical 45H covers it on key alone.
How fast can I get the BEST 45H7AT15H626 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 45H7AT15H626 come with a warranty?
Absolutely. The BEST 45H7AT15H626 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 45H7AT15H626?
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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