BEST 45H Series Heavy Duty Mor...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$539.00
$363.09
BEST 45H Series Heavy Duty Mortise Lock Body with Office Function and Field Reversible Design

BEST 45H Series Heavy Duty Mortise Lock Body with Office Function and Field Reversible Design

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Model: 45HCAAT626
$539.00
$363.09
Selected Finish is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$539.00
$363.09
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BEST 45H Series Heavy Duty Mortise Lock Body with Office Function and Field Reversible Design

Professional Grade Mortise Lock Solution for Commercial Applications

The BEST 45H Series mortise lock body delivers heavy-duty performance with office function operation and field reversible design. This Grade 1 mortise lock features a solid one-piece stainless steel anti-friction latch with 50% more surface contact for superior strength, 2-3/4" backset, and 0.095" cold rolled steel construction. The lock body accommodates doors 1-3/4" thick with ANSI A156.13 Series 1000 Grade 1 Operation and Strength certification 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 precision-engineered curve for enhanced cycle life.
  • Field Reversible Operation: Reversible latch rotates 180 degrees for easy handing change without opening case, plus four position hub toggle design for flexible configuration.
  • Heavy-Duty Construction: 0.095" cold rolled steel case, cover, and armored front with zinc dichromate plating for corrosion protection and enhanced durability.
  • Armored Front Protection: Completely surrounds latch and deadbolt providing increased lateral strength with staked assembly design for self-alignment during installation.
  • 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.
  • Grade 1 Certification: ANSI A156.13 Series 1000 Grade 1 Operation and Strength certification with Grade 2 Security rating for commercial applications.
  • Comprehensive 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 of 1-3/4" standard, stile width, and handing as applicable to this mortise lock body.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for proper mortise preparation.
  3. Prepare door by cutting mortise pocket to accommodate 5-7/8" H x 7/8" D x 4-1/16" W case dimensions and routing as specified in manufacturer instructions.
  4. Install lock body in mortise pocket and secure with mounting hardware per manufacturer torque specifications, ensuring proper alignment with door edge.
  5. Adjust operational components including four position hub toggle for proper locking configuration, latching alignment, and smooth operation throughout the full range of motion.
  6. Test lock operation to verify proper function of office function operation, field reversible features, 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

Anti-Microbial Option

Available with UltraShield antimicrobial protected coating in 626AM satin chrome and 630AM satin stainless steel finishes. The BEST UltraShield finish inhibits the growth of bacteria and other microbes on the surface of the hardware, recommended for healthcare, elderly care, education, transportation, food-service, and hospitality applications where product cleanliness is a high priority.

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 rated for ANSI A156.13 Grade 1 performance standards. The armored front design and roller bearing hub mechanism provide enhanced durability and smooth operation. Engineered for demanding commercial applications where dependable security and long-term performance 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 Lock Body
Subcategory:
Mortise
Keyed:
Yes
Commercial/Residential:
Commercial
Lock Type:
Mortise
Lock Function:
Office
Product Attribute:
Mortise Locks
Electronic:
No
Product Function:
Entrance/Office
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 45HCAAT626 – Frequently Asked Questions

1) What does the office function do on the BEST 45H mortise lock?
Office function (AT) on the BEST 45H means the outside lever is locked or unlocked by key from outside, and the inside lever always retracts the latch for free egress. It is a single cylinder, keyed function, so there is no key cylinder on the inside. That is the standard choice for offices, classrooms with staff control, and tenant suite doors where you want to leave the door unlocked during business hours and key it locked at close.
2) Does the BEST 45H mortise lock come with a core, or do I have to order one separately?
The lock body ships prepped for a BEST small format interchangeable core but without the core, so you supply the SFIC to your own keyway and keying. That is what lets a property with an existing BEST system drop the lock in and key it to the current master. Note the grade implication: the 45H carries ANSI A156.13 Grade 1 Operation and Strength with Grade 2 Security as standard, and to reach Grade 1 Security you need a drill resistant core (1CD, 1CDP, 1CDF or 1CDX) with escutcheon trim, or the 1EK7K4 high security cylinder with sectional trim.
3) Is the BEST 45H lock body only, or does it include levers and trim?
Body only. You get the mortise case, latch, deadbolt and armored front, and you order trim (levers or knobs, roses or escutcheons) and the interchangeable core separately. Budget for all three when you price the opening, and keep the trim family in mind, because the Grade 1 Security path differs between escutcheon and sectional trim.
4) Do I have to order the BEST 45H handed, and can I change the hand in the field?
Handing is a required selection at order (RH, LH, RHRB, or LHRB), but the lock is field reversible. The latchbolt rotates 180 degrees to change hand without opening the case, and the hub uses a four position toggle. For a property manager keeping spares on the shelf, that means one body can cover openings of either hand.
5) Will the BEST 45H latch into the strike already in my frame?
The latchbolt throws 3/4 inch and the deadbolt throws 1 inch, both stainless steel, off a 2-3/4 inch backset, which is the standard commercial mortise geometry. If the existing frame is prepped for an ANSI mortise strike at that backset, it will engage. Where you need the lip to reach past a stop or a gasketed frame, a 7/8 inch lip to center strike can be added at order.
6) Which BEST 45H finish should I specify for a hospital or food service facility?
Two antimicrobial options exist: 626AM, satin chrome with UltraShield 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 healthcare, elderly care, education, transportation, food service and hospitality. If cleanliness is not the driver, the plain 626 and 630 are the same appearance without the coating.
7) Should I use the BEST 45H or the 47H mortise lock?
The difference is the security rating. The 45H is ANSI A156.13 Series 1000, Grade 1 Operation and Strength with Grade 2 Security, and it reaches Grade 1 Security only when paired with a drill resistant core (1CD, 1CDP, 1CDF, 1CDX) behind escutcheon trim or the 1EK7K4 high security cylinder behind sectional trim. The 47H is Grade 1 for Operational, Strength and Security outright. If your spec sheet calls for Grade 1 security with no qualifiers, go 47H; otherwise the 45H covers it.
8) Is the BEST 45H mortise lock ADA compliant for accessible openings?
BEST states the design and operation of the 45H mortise lock meets the intent of ANSI A117.1 section 404.2.6, which is the accessible door hardware operation requirement. Pair it with lever trim rather than knobs to keep the opening compliant, since the lock body alone does not determine the operating device.
9) Is the BEST 45H an electrified or access control lock?
No. The 45H is a mechanical mortise lock, keyed by a small format interchangeable core, with no electrical option on this body. If the opening needs credential control, card access, or fail safe/fail secure behavior on loss of power, this is not the part; you want an electrified mortise body instead.
10) What finishes does the BEST 45H mortise lock come in?
Fifteen: 605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 613 oil rubbed satin bronze, 618 bright nickel, 619 satin nickel, 622 matte black, 625 bright chrome, 626 satin chrome, 626AM antimicrobial satin chrome, 629 bright stainless, 630 satin stainless, 630AM antimicrobial satin stainless, and 690 statuary dark bronze. Two behave differently over time: 613 is meant to wear to an antique look, and 690 stays a dark brown. If you are matching existing openings across a building, 626 and 630 are the usual commercial standards.
11) How durable is the BEST 45H case for a high traffic entry?
Heavy duty, commercial rated. The case, cover and armored front are 0.095 inch cold rolled steel with zinc dichromate plating for corrosion resistance. The armored front wraps both latch and deadbolt for lateral strength, the hub runs on roller bearings, and the trim carries a lever return spring to fight lever droop. The one piece stainless anti-friction latch is oil impregnated and has 50 percent more contact surface with the strike.
12) What are the security head screws option on the BEST 45H, and do I need them?
It is a yes or no selection at order that swaps in tamper resistant fasteners. Worth taking on detention adjacent, corrections, school, or public restroom openings where the exposed face is reachable. The body already includes a cylinder security screw that prevents the cylinder being removed without first pulling the interchangeable core, and machined cylinder rings with a wavy washer to resist wrenching.
How fast can I get the BEST 45HCAAT626 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 45HCAAT626 come with a warranty?
Absolutely. The BEST 45HCAAT626 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 45HCAAT626?
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
Why buy the BEST 45HCAAT626 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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