BEST 45H Series Heavy Duty Mor...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$539.00
$363.33
BEST BEST 45HCA Series (AT - Office Function) - Heavy Duty Mortise Lockbody Only, Field Reversible 45HCAAT

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

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Model: 45HCAAT626
$539.00
$363.33
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$539.00
$363.33
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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) Does the BEST 45H office function mortise lock come with a core, or do I need to order one separately?
The 45H lock body ships prepped for a small format interchangeable core but without the core. It is a single cylinder keyed lock, so you need one SFIC core in your keyway and keying to make it operational. If you need Grade 1 Security rather than the Grade 2 Security the lock carries as standard, BEST calls for a drill resistant core (1CD, 1CDP, 1CDF or 1CDX) with escutcheon trims, or the 1EK7K4 high security cylinder with sectional trims.
2) Is the lever trim included with the BEST 45HCA office function mortise lock?
No. This is the mortise lock body only. Levers or knobs, roses or escutcheons, and the core are all separate orders. Budget for trim, an SFIC core, and a strike package when you spec it.
3) What does office function actually do on a BEST 45H mortise lock?
Office function (the AT function in the 45H line) is an entrance/office lock: the outside lever is locked or unlocked by key, and the inside lever always retracts the latch for free egress. It also carries a deadbolt with a 1 inch throw that the inside thumbturn can project. Practical use is a tenant suite or staff office where someone wants to leave the door unlocked during business hours and secure it by key at the end of the day.
4) Do I have to specify handing when I order the BEST 45H mortise lock body?
Handing is a required selection at order (RH, LH, RHRB or LHRB), but the lock itself is field reversible. The stainless latchbolt rotates 180 degrees without opening the case, and a four position hub toggle sets the configuration, so a wrong call on the order does not scrap the lock. The auxiliary deadlatch is non-handed.
5) Will the BEST 45H mortise lock work on a door thicker than 1-3/4 inches?
The standard configuration is built for 1-3/4 inch doors, which covers most commercial openings. BEST does offer a thick door configuration up to 5 inches, but the thickness has to be called out at the time of order, not adjusted later in the field.
6) Is the BEST 45H mortise lock Grade 1, and does it meet ADA lever operation requirements?
The 45H Series is certified to ANSI A156.13, Series 1000, Grade 1 for Operation and Strength, with a Grade 2 Security rating. BEST states the design and operation meet the intent of ANSI A117.1 section 404.2.6, the accessible door hardware operation clause. If your spec demands Grade 1 Security as well, the 47H Series carries Grade 1 for Operational, Strength and Security.
7) Which BEST 45H finish should I use in a hospital or clinic?
For healthcare, specify 626AM (satin chrome) or 630AM (satin stainless) with the UltraShield antimicrobial coating, which inhibits growth of bacteria and other microbes on the hardware surface. BEST also points it at elderly care, education, transportation, food service and hospitality. If you are matching existing doors and antimicrobial is not a requirement, plain 626 and 630 are the standard commercial choices.
8) I need to match dark bronze and oil rubbed doors already in the building. What BEST 45H finishes cover that?
Fifteen finishes are offered, and two are dark. 690 statuary dark bronze stays a dark brown appearance over time, while 613 oxidized satin bronze is oil rubbed and is meant to wear to an antique look, so it will not stay uniform across doors installed at different dates. If you want the fleet to look the same in five years, 690 is the more predictable match. Satin bronze 612 and bright bronze 611 round out the bronze range.
9) What stops someone from pulling the cylinder off a BEST 45H mortise lock?
Two things. Solid machined cylinder rings with a wavy washer resist wrenching, and a cylinder security screw blocks removal of the cylinder unless the interchangeable core is pulled first. The armored front wraps both the latch and the deadbolt for lateral strength, and security head screws can be added as an order option if the opening is exposed.
10) Is a mortise lock like the BEST 45H worth it over a cylindrical lock on a high traffic commercial door?
On a door taking constant use, a mortise body gives you a deadbolt and a latch in one case, which a cylindrical lockset does not. The 45H uses 0.095 inch cold rolled steel for the case, cover and armored front with zinc dichromate plating, a solid one-piece stainless anti-friction latch with 50 percent more contact with the strike, and a roller bearing hub with a lever return spring in the trim to fight lever droop. The tradeoff is the door has to be mortised, which is a larger prep than boring for a cylindrical lock.
11) Is the BEST 45H mortise lock an electrified or access control lock?
No. The 45H office function lock body is purely mechanical and key operated. If the opening needs card access, remote release, or monitoring, this is not the part, and a mechanical lock body is not retrofittable to electrified operation.
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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