BEST 45H Series Heavy Duty Mor...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$539.00
$354.94
BEST BEST 45HCA Series (A - Office Function) - Heavy Duty Mortise Lockbody Only, Field Reversible 45HCAA

BEST 45H Series Heavy Duty Mortise Lock Case with Office Function

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Model: 45HCAA626
$539.00
$354.94
Selected Finish is

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

$539.00
$354.94
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BEST 45H Series Heavy Duty Mortise Lock Case with Office Function

Professional Grade Mortise Lock Case for Commercial Applications

The BEST 45H Series mortise lock case delivers heavy-duty performance for commercial office applications with field-reversible operation and Grade 1 strength rating. This lockbody-only unit features a 2-3/4" backset, 1" deadbolt throw, and 3/4" latchbolt throw in a robust 0.095" cold rolled steel case measuring 5-7/8" H x 7/8" D x 4-1/16" W. Designed for doors 1-3/4" thick with ANSI A156.13 Series 1000 Grade 1 operation and strength compliance.

Professional Features & Benefits

  • Heavy-Duty Steel Construction: 0.095" cold rolled steel case, cover, and armored front provide exceptional durability and strength for demanding commercial applications.
  • Field-Reversible Design: Reversible latch rotates 180 degrees for easy handing change without opening the case, reducing installation time and inventory requirements.
  • Enhanced Security Features: Solid one-piece stainless steel anti-friction latch provides 50% more surface contact with strike for superior strength and security performance.
  • Precision Engineering: Roller bearing hub mechanism ensures smooth, wear-resistant operation with enhanced cycle life and reduced strike wear.
  • Reinforced Case Integrity: Four corner case cover screws plus interlocking armored front and cover design at the latch provide maximum structural strength.
  • Professional Grade Compliance: ANSI A156.13 Series 1000 Grade 1 Operation and Strength, Grade 2 Security rating for commercial building code requirements.
  • Anti-Microbial Options: Available with UltraShield antimicrobial protected coating (626AM, 630AM) for healthcare and high-cleanliness applications.
  • Comprehensive Finish Selection: Multiple finish options including satin stainless steel (630), satin chrome (626), and specialized antimicrobial coatings for various architectural requirements.

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 the 8" H x 1-1/4" W faceplate.
  3. Prepare door mortise pocket to accommodate the 5-7/8" H x 7/8" D x 4-1/16" W case dimensions and route for the 2-3/4" backset configuration.
  4. Install the lockbody into the mortise pocket and secure with appropriate fasteners per manufacturer torque specifications.
  5. Adjust the field-reversible latch and four-position hub toggle for proper handing and operational requirements without opening the case.
  6. Test deadbolt (1" throw) and latchbolt (3/4" throw) operation to verify proper function and alignment with strike hardware. 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

Anti-Microbial Option

Available with UltraShield antimicrobial protected coating in satin chrome (626AM) and satin stainless steel (630AM) finishes. The BEST UltraShield finish inhibits the growth of bacteria and other microbes on the hardware surface, 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 precision-engineered components designed for demanding commercial applications. ANSI A156.13 Series 1000 Grade 1 operation and strength rating ensures code compliance and long-term performance. Engineered with field-reversible operation and enhanced security features where dependable access control is 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 45HCAA626 – Frequently Asked Questions

1) Can the BEST 45H office function mortise lock go in a door thicker than 1-3/4 inches?
Standard build is for 1-3/4 inch doors, which covers most commercial openings. For anything heavier, a thick door configuration handles doors up to 5 inches, and the actual thickness has to be stated on the order rather than set in the field. So measure the leaf first on lead-lined, acoustic, or built-up exterior doors, and order to that number.
2) Does the BEST 45H office function mortise lock come with the lever trim and the core?
Lock body only. What ships is the mortise case itself, field reversible, prepped for a small format interchangeable core and supplied less core. The trim (escutcheon or sectional) and the core are separate line items, and the strike is separate as well. Budget all three when you are pricing a full opening, because the case on its own will not finish the door.
3) What cylinder does the BEST 45H mortise lock take, and can I key it into the system I already run?
It arrives prepped for a small format interchangeable core and less core, so the core is ordered separately and can be pinned to the masterkey system already in the building. Change the core and the lock changes keying without pulling the case out of the door, which is the reason most institutional accounts spec SFIC in the first place. Keyed function is single cylinder, so there is one keyed side, not two.
4) Do I have to order the BEST 45H mortise lock handed, or can it be reversed on site?
Handing is called out on the order, using the four standard designations (RH, LH, RHRB, LHRB). The case itself is field reversible though: the latch rotates 180 degrees without opening the case, and the hub has a four-position toggle, so a lock already sitting on the shelf can be turned around for the opposite hand with no service kit and no parts. The auxiliary bolt is non-handed. For a property manager stocking spares, that means one case covers openings of either hand.
5) Will the BEST 45H latch into the strike that is already in my frame?
Match the strike to the bolts, not to the brand. The latchbolt throws 3/4 inch and is solid one-piece stainless, oil-impregnated for anti-friction operation, and it is backed by a stainless auxiliary bolt that deadlatches it against carding. The deadbolt is separate and throws a full 1 inch, so the frame needs a pocket deep enough to take it. An existing strike cut only for a latch, or prepped for a shorter throw, will not serve; the strike has to accept a 3/4 inch latch plus a 1 inch deadbolt along the 8 inch faceplate line.
6) Is the BEST 45H mortise lock Grade 1, and does it meet Grade 1 for security?
Operation and strength are ANSI A156.13, Series 1000, Grade 1. Security is Grade 2 as it stands. To reach Grade 1 security you have to specify the cylinder side of it: a drill resistant core (1CD, 1CDP, 1CDF or 1CDX) when you are using escutcheon trim, or the 1EK7K4 high security cylinder when you are using sectional trim. If the spec sheet demands Grade 1 across operation, strength and security with no qualifiers, the 47H series carries all three at Series 1000 Grade 1.
7) Is there an electrified version of the BEST 45H mortise lock for card access?
No electrified option here. The 45H office function case is purely mechanical, with no wiring, no solenoid and no request-to-exit switch, so it will not tie into a card reader or an access control panel. Openings that need to sit on the access system want an electrified mortise lock body or an electric strike instead. Use the 45H on the doors that stay on keys, which on most buildings is still the majority of them.
8) Does BEST offer an antimicrobial finish on the 45H mortise lock for healthcare work?
Two carry it: 626AM, satin chrome plated with the UltraShield antimicrobial protected coating, and 630AM, satin stainless steel with the same coating. The coating inhibits growth of bacteria and other microbes on the hardware surface. BEST calls it out for hospital and elderly care, education, transportation, food service and hospitality settings where cleanliness drives the spec. Mechanically it is the same lock as the standard 626 and 630, so you can run AM finishes on patient-facing doors and plain finishes elsewhere without changing the case.
9) Does the office function BEST 45H have a deadbolt, or just a latch?
Both. There is a 1 inch stainless deadbolt in addition to the 3/4 inch stainless latchbolt, so the door can be secured beyond the latch on an entrance or office opening. Keyed function is single cylinder, meaning one keyed side. When you prep the frame, allow for both bolts rather than the latch alone.
10) Which BEST 45H finish matches oil rubbed bronze hardware on the rest of our doors?
613, oxidized satin bronze oil rubbed, is the match. Before you standardize on it, know that 613 is designed to wear over time to an antique appearance, so new locks will not look identical to ones that have been in service for years. If you want dark bronze that holds its look, 690 stays a dark brown appearance over time. The rest of the range runs 605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 618 bright nickel, 619 satin nickel, 622 flat black, 625 bright chrome, 626 satin chrome, 629 bright stainless and 630 satin stainless. On a mortised case the finish that shows is the faceplate and armored front; the case is buried in the door.
11) Does the BEST 45H mortise lock meet accessibility requirements for a public building?
BEST states that the design and operation of the 45H mortise lock meets the intent of the standard for ANSI A117.1 section 404.2.6. Remember that the case ships without trim, so the lever or knob specified alongside it is the other half of what an inspector looks at on operable hardware.
12) Can a BEST 45H mortise lock be used on an exterior door in a damp or coastal location?
The case is 0.095 inch cold rolled steel, zinc dichromate plated for corrosion protection, and the working bolts (latchbolt, deadbolt and auxiliary bolt) are stainless steel. For exposed openings, specifying a stainless faceplate finish, 629 bright stainless or 630 satin stainless, keeps the visible edge on stainless rather than plated brass, since finishes like 618, 619, 622, 625, 626 and 690 are on a brass base material.
How fast can I get the BEST 45HCAA626 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 45HCAA626 come with a warranty?
Absolutely. The BEST 45HCAA626 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 45HCAA626?
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 45HCAA626 from ZenSupply?
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