BEST 45H Series Heavy Duty Mor...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,498.00
$832.22
BEST 45H Series (AT - Office Function) - Escutcheon Trim Heavy Duty Mortise Lock with Indicator, SFIC Housing Less Core

BEST 45H Series Heavy Duty Mortise Lock with Indicator - Office Function Escutcheon Trim SFIC Housing

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Model: 45H7AT3J626VIT
$1,498.00
$832.22
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,498.00
$832.22
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BEST 45H Series Heavy Duty Mortise Lock with Indicator - Office Function Escutcheon Trim SFIC Housing

Professional Grade Mortise Lock with Visual Indicator Technology

The BEST 45H Series Heavy Duty Mortise Lock delivers commercial-grade security with advanced indicator functionality for office applications. This mortise lock features a 2-3/4" backset, solid stainless steel anti-friction latch with 50% more surface contact, and SFIC housing preparation for interchangeable core systems. Constructed with 0.095" cold rolled steel case components and an 8" H x 1-1/4" W stainless steel faceplate, this lock meets ANSI A156.13 Grade 1 Operation and Strength standards for demanding commercial environments.

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 reversible 180-degree rotation.
  • Heavy-Duty Construction: 0.095" cold rolled steel case, cover, and armored front with zinc dichromate plating for exceptional durability and corrosion protection.
  • Visual Indicator System: Clear padlock icon display shows open for unlocked and closed red padlock for locked status with enhanced visibility.
  • Precision Engineering: Roller bearing hub mechanism provides smooth, wear-resistant operation with enhanced cycle life and reduced strike wear.
  • Advanced Security Features: Armored front completely surrounds latch and deadbolt providing increased lateral strength with four-corner case cover screw design.
  • Installation Efficiency: Self-aligning trim mechanism and field-reversible components enable fast, accurate installation without case opening.
  • ANSI Compliance: Meets ANSI A156.13 Series 1000 Grade 1 Operation and Strength, Grade 2 Security standards for commercial applications.
  • SFIC Compatibility: Small Format Interchangeable Core housing preparation allows flexible key system integration without included 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), 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 alignment.
  3. Prepare door mortise pocket and frame strike preparation according to specifications for 8" faceplate and curved lip strike assembly.
  4. Install lock case into mortise pocket and secure armored front to door edge, allowing self-alignment with door bevel during installation.
  5. Mount escutcheon trim using self-aligning mechanism and secure with appropriate fasteners per manufacturer torque specifications.
  6. Test indicator operation, latch function, and deadbolt throw to verify proper alignment and smooth operation throughout full range of motion. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

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

Why Choose BEST Quality?

BEST 45H Series mortise locks deliver professional-grade reliability with 0.095" cold rolled steel construction and precision-engineered components rated for demanding commercial applications. The solid stainless steel anti-friction latch design provides enhanced cycle life with 50% more surface contact for superior strength and security. Engineered to meet ANSI A156.13 Grade 1 standards where dependable performance and visual status indication are essential.

Manufacturer Resources

BEST Product Overview

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:
Indicator 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 45H7AT3J626VIT – Frequently Asked Questions

1) Will the BEST 45H mortise lock fit a door thicker than 1-3/4 inches?
The standard 45H configuration is built for 1-3/4 inch doors. BEST does offer a thick-door configuration for doors up to 5 inches, but the thickness has to be specified when the order is placed, so it is not a field adjustment on a standard lock. If you are working a mix of openings, confirm each door before ordering rather than assuming one part number covers them all.
2) Does the BEST 45H indicator lock come with a core?
No core is included. The housing is prepped for a small format interchangeable core (SFIC) and ships less core, so you supply the BEST SFIC in your own keyway and keying. That is what makes it easy to fold into an existing BEST key system, but it also means a bare lock will not operate keyed until a core is installed.
3) Do I have to specify handing when ordering a BEST 45H mortise lock?
Yes. Hand is a required selection: left hand, right hand, left hand reverse, or right hand reverse. The latchbolt itself is reversible 180 degrees in the field without opening the case, so a hand mix-up on the latch is recoverable, but the trim and indicator orientation follow the hand you order.
4) Will the BEST 45H latch into my existing mortise strike prep?
The 45H runs a 2-3/4 inch backset with a 3/4 inch stainless latchbolt throw and a 1 inch deadbolt throw, behind an 8 inch by 1-1/4 inch by 1/16 inch faceplate. If the door you are replacing uses that same 8 inch face and 2-3/4 backset, the pocket and edge prep line up. The strike lip and frame cutout still need to match the curved lip strike package, and a deeper strike box is needed for the 1 inch deadbolt if the old lock had no bolt.
5) What grade is the BEST 45H mortise lock, and is it Grade 1 for security too?
The 45H meets ANSI A156.13, Series 1000, Grade 1 Operation and Strength, Grade 2 Security. To reach Grade 1 Security with escutcheon trim, a drill resistant core (1CD, 1CDP, 1CDF, or 1CDX) must be used. If your spec calls for Grade 1 across operation, strength, and security out of the box, BEST's 47H Series carries all three.
6) What is the closest Grade 1 mortise equivalent to the BEST 45H office function lock from another manufacturer?
The Cal-Royal NM8050 is a heavy duty Grade 1 mortise lockset in an entrance/office function, which is the nearest function match to the BEST 45H AT office function lock. The BEST 45H carries a 2-3/4 inch backset and an SFIC housing prepped less core, so if the building is already on a small format interchangeable core key system, the BEST keeps that system intact. The NM8050 is listed for 1-3/4 inch doors, while the BEST 45H standard configuration is for 1-3/4 inch doors with thick door configurations available up to 5 inch when specified at time of order.
7) I need a storeroom function instead of office - what mortise lock should I order?
Office function unlocks and relocks by key or by the inside control, so an opening that must stay locked at all times needs a storeroom lock instead. The Accentra 8805FL is a Grade 1 storeroom mortise lock with an Arcadia lever, and the Cal-Royal NM8080 is a heavy duty Grade 1 storeroom mortise lockset offered with an interchangeable core option, which matters if the rest of your doors run BEST small format cores like the 45H SFIC housing.
8) What is the difference between the BEST 45H indicator lock and the Marks USA LA318GJ indicator lockset?
Both are Grade 1 mortise locks with a visual status indicator. The Marks USA LA318GJ is a classroom security indicator lockset supplied with an ANSI strike and a steel escutcheon measuring 8-1/2 inches H x 2-3/4 inches W x 7/16 inches, and is listed for 1-3/4 inch doors. The BEST 45H AT is an office function with escutcheon trim and an 8 inch H x 1-1/4 inch W faceplate, prepped for a small format interchangeable core sold separately. Classroom security means the door is locked and unlocked from inside the room by key; office function is the choice where staff need to secure the door from either side during normal use.
9) Can I use the Hager 3850E office mortise lock in place of the BEST 45H?
They share the office function and a 2-3/4 inch backset, and both come with lever and escutcheon trim. The difference that decides it is keying: the Hager 3850E is a non-keyed office lock listed for doors 1-3/4 inch to 2-1/2 inch, while the BEST 45H AT is keyed with a single cylinder and an SFIC housing so it can be pinned into an existing small format interchangeable core system. If the door has to accept a key from the corridor side, the 45H is the one to order.
10) Can the BEST 45H go on a 1-3/8 inch or 2-1/2 inch backset residential door?
No. The BEST 45H is built on a 2-3/4 inch backset for commercial doors, standard configuration for 1-3/4 inch thickness. Baldwin's mortise lock bodies use a 2-1/2 inch backset: the 6301 entry/apartment knob by knob and 6301LS lever by lever are listed for doors 1-3/4 inch and over, and the 6310 entry/storeroom is listed for 1-3/8 inch and over. The mortise pocket and cross-bore layouts are not interchangeable, so a door prepped for one backset needs the matching lock body.
11) What does the office function (AT) do on the BEST 45H indicator lock, and where is it used?
Office function means the outside lever can be locked or unlocked, with the indicator showing status: a clear open padlock icon when unlocked and a closed red padlock when locked. It is the right pick for private offices, exam rooms, and conference rooms where someone needs to see at a glance whether the door is secured. If you need a lever that is always locked outside and free egress inside, that is storeroom function instead, such as the Cal-Royal NM8080 or the Accentra 8805FL.
12) Which escutcheon trim style should I order on the BEST 45H, and can I hide the cylinder?
Three escutcheon trims are offered: J wrought, M forged, and N forged with a concealed cylinder. Pick N when you want the SFIC core out of sight on the outside face. Lever choice is separate, with solid tube with or without return, contour with angle return, curved with or without return, gull wing, and a round knob option.
13) Is there an antimicrobial finish option for healthcare doors on the BEST 45H?
Two UltraShield antimicrobial finishes are offered, 626AM satin chrome and 630AM satin stainless steel. The coating inhibits growth of bacteria and other microbes on the hardware surface, and BEST recommends it for hospital and elderly care, education, transportation, food service, and hospitality openings. If cleanliness is not a driver, the standard 626 and 630 are the same finishes without the coating.
14) Is the BEST 45H an electronic or access control lock?
No, it is a purely mechanical single cylinder keyed mortise lock with a visual indicator. If you need credentials, audit trail, or remote control on the same opening, look at electronic mortise locks such as the Schlage CO-100 standalone keypad lock, the TownSteel FME-2000 RFID Grade 1 classroom lock, or the Command Access ML190 motorized 24VDC lock for electric lock/unlock.
15) What is a comparable indicator mortise lock to the BEST 45H from another brand?
The closest cross-brand match we carry is the Marks USA LA318GJ classroom security indicator mortise lockset, Grade 1, for 1-3/4 inch doors, with an ANSI strike and a steel escutcheon measuring 8-1/2 x 2-3/4 x 7/16 inches. Note the difference in function: the Marks unit is classroom security, while the 45H AT is office function. For non-indicator office function, the Cal-Royal NM8050 and Hager 3850E are alternatives, the Hager with a 2-3/4 inch backset and escutcheon trim.
16) Does the BEST 45H meet accessibility requirements for lever operation?
BEST states the design and operation of the 45H mortise lock meets the intent of ANSI A117.1 section 404.2.6. Choose a lever rather than the 4 round knob option if accessibility is a requirement on the opening, since the knob is offered as a style but a lever is what satisfies operable-part requirements.
17) Is there a non-keyed mortise lock I can use on the doors in the same run that do not need a cylinder?
Yes. For passage openings in the same corridor, the Falcon MA101 is a Grade 1 heavy duty mortise passage lock with field reversible operation and a fire rating, the Schlage PM010 is a Grade 1 non-keyed passage latch mortise lock for 1-3/4 inch doors, and the Hager 3810E is a Grade 1 passage mortise lock with escutcheon and a 2-3/4 inch backset matching the 45H backset. The BEST 45H AT is keyed with a single cylinder, so it is the wrong pick where no locking is wanted.
18) The opening needs restroom privacy, not office function - what mortise lock takes its place?
Use a privacy function lock. The Cal-Royal NM8440 is a heavy duty Grade 1 privacy mortise lockset with 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 listed for 1-3/4 inch to 2 inch doors. The BEST 45H AT office function is keyed with a single cylinder and prepped for a small format interchangeable core, which is more lock than a bath or bed door needs.
19) Which mortise locks look like a substitute for the BEST 45H but will not work?
A few to rule out. The Emtek 3019 Brisbane, 3102 Memphis, 3104 Hamilton and 3106 Manhattan mortise entrance locksets are dummy function - no latch operation at all - and the Schlage L0170 is a Grade 1 half dummy trim. The Sargent 130KB and 130W are mortise thumbturns, trim pieces rather than lock bodies. The Sargent 4874 is a double cylinder mortise deadbolt with a 2-3/4 inch backset, so it shares the backset but has no latchbolt or lever. The BEST 45H AT is a complete keyed mortise lock with lever escutcheon trim and a 1 inch throw deadbolt in the case.
20) If I want audit trail or credential access on this opening instead of a mechanical key, what replaces the BEST 45H?
Move to an electronic mortise lock. The Schlage CO-100 is a Grade 1 standalone electronic mortise lock with a keypad reader for 1-3/4 inch doors, the TownSteel FME-2000 is a Grade 1 heavy duty mortise lockset with RFID in a classroom function, and the Dormakaba E-Plex E5086 is a Grade 1 pushbutton and card back to back mortise lock. The BEST 45H AT is non-electronic and keyed with a single cylinder, so access changes are made by rekeying the interchangeable core rather than by editing codes.
21) For a classroom or dormitory opening, what should I specify instead of the 45H office function?
For classrooms, the Corbin Russwin ML2003 is a Grade 1 mortise classroom lockset for 1-3/4 inch doors and the Cal-Royal NM8070 is a heavy duty Grade 1 classroom mortise lockset, also 1-3/4 inch. For dormitory corridor use, the Sargent 7925 is a Grade 1 heavy duty dormitory exit function mortise lock with rose trim and a single cylinder deadbolt. The BEST 45H AT is an office function with escutcheon trim and a 2-3/4 inch backset, so it fits corridor offices and suite doors rather than instructional or dorm room openings.
22) What mortise lock should I use on a behavioral health door where the 45H lever trim is not acceptable?
Anti-ligature trim is the requirement there. The TownSteel MRX-L-01 is a Grade 1 heavy duty anti-ligature lever mortise lockset in stainless steel for 1-3/4 inch doors, the MRX-A-01 is the same passage function in a ligature resistant arch trim, and the Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset that is ligature resistant and ADA compliant in satin stainless steel. The BEST 45H AT uses conventional lever and escutcheon trim, with 626AM satin chrome and 630AM satin stainless antimicrobial finishes offered for healthcare use.
23) I need electrified lock/unlock control on this door - what takes the place of the BEST 45H?
Two options. 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 operation for 1-3/4 inch doors. The Command Access ML190 is a heavy duty motorized mortise lock with field selectable EL or EU operation on 24VDC in a storeroom function. The BEST 45H AT is a non-electronic mechanical lock, so it cannot be tied into an access control panel without changing the lock body.
24) What finishes does the BEST 45H mortise lock come in for matching existing building hardware?
Fourteen finishes are available: 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 flat black, 625 bright chrome, 626 satin chrome, 626AM and 630AM antimicrobial, 630 satin stainless, and 690 dark bronze. Two of those change over time by design: 613 wears to an antique look, and 690 stays a dark brown. If you are standardizing a building, 630 satin stainless is the usual commercial match.
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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 45H7AT3J626VIT come with a warranty?
Absolutely. The BEST 45H7AT3J626VIT 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 45H7AT3J626VIT?
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