BEST 45H Series Heavy Duty Mor...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,560.00
$900.75
BEST BEST 45H Series (CHB - Holdback Function) - Escutcheon Trim Heavy Duty Mortise Lock, Double Keyed BES-45H-CHB-ES

BEST 45H Series Heavy Duty Mortise Lock with CHB Holdback Function and Escutcheon Trim

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Model: 45H7CHB3J626
$1,560.00
$900.75
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,560.00
$900.75
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BEST 45H Series Heavy Duty Mortise Lock with CHB Holdback Function and Escutcheon Trim

Professional Grade Mortise Lock with Advanced Security Features

The BEST 45H Series Heavy Duty Mortise Lock delivers commercial-grade security with CHB holdback function and escutcheon trim configuration. Engineered with a solid one-piece stainless steel anti-friction latch providing 50% more surface contact with strike, this double keyed mortise lock features 2-3/4" backset and meets ANSI A156.13 Series 1000 Grade 1 Operation and Strength standards. The 0.095" cold rolled steel case construction with armored front design ensures exceptional durability 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: 0.095" cold rolled steel case, cover, and armored front manufactured for exceptional strength and durability in commercial applications.
  • Armored Front Protection: Completely surrounds latch and deadbolt providing increased lateral strength with staked assembly design for self-alignment during installation.
  • Roller Bearing Hub Mechanism: Provides smooth, wear-resistant operation with four position hub toggle design for easy handing changes without opening case.
  • Enhanced Case Integrity: Four case cover screws at each corner plus interlocking armored front and cover design at the latch for superior structural strength.
  • Reversible Latch Operation: Rotates 180 degrees for easy handing change without opening case with non-handed cylinder retainer for installation flexibility.
  • Self-Aligning Trim Mechanism: Enables fast, easy, and accurate installation with lever return spring mechanism located in trim for enhanced protection against lever droop.
  • Cylinder Security Features: Solid machined cylinder rings with wavy washer provides resistance to wrenching with security screw preventing 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), 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 drill required holes for cylinder, trim mounting, and strike installation per manufacturer specifications.
  4. Install case assembly into mortise pocket ensuring proper alignment with armored front self-aligning with door bevel during installation.
  5. Mount escutcheon trim with lever return spring mechanism and configure four position hub toggle for desired locking operation per application requirements.
  6. Test lock operation including latch and deadbolt function, key operation from both sides, and holdback function to verify proper installation and smooth operation throughout full range of motion.

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Government and Municipal Buildings
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • High-Security Commercial Applications

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. Meeting ANSI A156.13 Series 1000 Grade 1 Operation and Strength standards with enhanced cycle life design, these locks provide dependable security performance where superior strength and durability are essential. The advanced anti-friction latch technology and roller bearing hub mechanism ensure smooth, long-lasting operation in high-traffic commercial environments.

Product Specs

Series:
45H
Standard Cylinder:
SFIC Prep Less Core
Duty Level:
Heavy Duty
Keyed Function:
Double 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 45H7CHB3J626 – Frequently Asked Questions

1) What does the CHB holdback function actually do on a mortise lock?
CHB is a double keyed holdback function: a key is used from either side, and the latch can be held retracted so the door stays free-swinging until it is released. Because it is keyed on both sides, egress is by key, which matters where a code official requires free egress. It is not a classroom or storeroom function, so check the door's egress requirement before specifying it.
2) Does the BEST 45H come with cylinders or cores?
No cores. The 45H ships with SFIC prep less core, so you supply BEST small format interchangeable cores keyed to your system. A security screw keeps the cylinder from being removed until the core is pulled first, and the machined cylinder rings with wavy washer resist wrenching. Budget two cores per lock for this double cylinder function.
3) What ANSI grade is the BEST 45H, and how do I get Grade 1 security out of it?
The 45H meets ANSI A156.13, Series 1000, Grade 1 Operation and Strength, with Grade 2 Security as standard. To reach Grade 1 Security with escutcheon trim you must use a drill resistant core, 1CD, 1CDP, 1CDF or 1CDX. With sectional trim the requirement is instead a 1EK7K4 high security cylinder. If a Grade 1 security spec is on the drawing, the core choice is what satisfies it.
4) Will the 45H latch into the strike I already have in the frame?
The latchbolt is solid stainless with a 3/4 inch throw and the deadbolt throws 1 inch, which is standard for an ANSI mortise lock in a commercial frame. A frame already prepped for an ANSI mortise strike will accept it. The anti-friction latch is oil impregnated and gives about 50 percent more surface contact with the strike, so it tolerates a slightly out of plumb frame better than a plain bevel latch.
5) Do I have to order the BEST 45H handed?
Handing is field changeable. The latch reverses by rotating 180 degrees without opening the case, the hub uses a four position toggle so the locking arrangement can be set in the field, and the cylinder retainer is non-handed. The auxiliary bolt is non-handed stainless as well. That makes it practical to stock one lock for both hands across a building.
6) Will a Baldwin 6301 or 6310 mortise lock body fit the same door prep as the BEST 45H CHB?
No. The BEST 45H uses a 2-3/4 inch backset case. The Baldwin 6301 entry/apartment and 6310 entry/storeroom mortise lock bodies are 2-1/2 inch backset, so the cylinder and trim centers do not line up with a 45H mortise pocket. Treat them as a different prep, not a drop-in swap.
7) What should I use instead of the BEST 45H CHB on a classroom door?
The 45H CHB is a double-keyed holdback lock, not a classroom function. For classroom operation in a mortise case, the Cal-Royal NM8070 is a Grade 1 classroom mortise lockset for 1-3/4 inch doors, the Corbin Russwin ML2003 is a Grade 1 mortise classroom lockset in the ML2000 Series for 1-3/4 inch doors, and the Marks USA LA318GJ is a Grade 1 classroom security indicator mortise lockset with an ANSI strike and a steel escutcheon measuring 8-1/2 inch H x 2-3/4 inch W x 7/16 inch.
8) Is there an electronic mortise lock I can use in place of the BEST 45H CHB to get keypad or credential access?
The BEST 45H is a mechanical lock with no electronic option, prepped for a small format interchangeable core less core. For credential or code access on a mortise prep, the Alarm Lock DL3500CR is a Grade 1 electronic mortise lock with 300 user codes and classroom function for doors 1-5/8 inch to 1-7/8 inch, the Schlage CO-100-MS-40-KP is a Grade 1 standalone electronic mortise lock with keypad reader and privacy function for 1-3/4 inch doors, and the TownSteel FME-2000 is a Grade 1 classroom mortise lockset with RFID for 1-3/4 inch doors.
9) For a behavioral health or ligature-resistant opening, what mortise lockset should I specify instead of the BEST 45H CHB with lever trim?
The 45H CHB uses lever or knob trim styles including curved with return, gull wing and round knob, which project from the escutcheon. For anti-ligature openings, the TownSteel MRX-L-01 is a Grade 1 heavy duty anti-ligature lever mortise lockset in stainless steel with passage function for 1-3/4 inch doors, the MRX-A-01 is the same passage function with satin stainless 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.
10) What trim and lever choices do I have to specify on the 45H escutcheon version?
Three escutcheon trims: J wrought, M forged, and N forged with concealed cylinder. Lever and knob options are 12 solid tube without return, 3 solid tube with return, 4 round knob, contour with angle return, curved with return, curved without return, and gull wing. N trim conceals the cylinder behind the escutcheon, which is the choice where you do not want the core visible on the corridor side.
11) Which BEST 45H finish should I use in a hospital or long-term care facility?
Two antimicrobial finishes are offered: 626AM satin chrome and 630AM satin stainless, both with the UltraShield coating that inhibits growth of bacteria and other microbes on the hardware surface. BEST recommends it for healthcare, elderly care, education, transportation, food service and hospitality. For everything else the standard range runs 605, 606, 611, 612, 613, 618, 619, 622, 625, 626, 630 and 690.
12) Will the 613 or 690 finish on a BEST 45H match the other doors in my building over time?
Those two finishes change. 613, oxidized satin bronze oil rubbed, is designed to wear over time into an antique appearance, so a new lock set beside existing 613 hardware will not match at first. 690 dark bronze stays a dark brown appearance over time. If you need a stable, consistent look across a fleet of openings, the plated and clear coated finishes such as 626 satin chrome or 630 satin stainless hold their appearance better.
13) Is there an electrified version of the BEST 45H, or do I need a different lock for access control?
The 45H CHB is mechanical, not electronic. For an electrified mortise opening ZenSupply carries the Schlage 03A electric lock/unlock outside lever mortise lock with request to exit at 12/24VDC, and the Command Access ML190 Series motorized mortise lock with field selectable EL/EU operation on 24VDC. For standalone credential access instead of wiring, the TownSteel FME-2000 Grade 1 RFID mortise lockset and the Dormakaba E-Plex 2066 pushbutton keyless mortise lock are options.
14) I need a Grade 1 mortise lock but a classroom or storeroom function, not holdback. What else is there?
The CHB configuration is double keyed holdback, so it is the wrong function for a classroom or storeroom opening. Grade 1 alternatives ZenSupply carries include the Corbin Russwin ML2003 classroom mortise lockset for 1-3/4 inch doors, the Cal-Royal NM8070 classroom and NM8080 storeroom locksets, and the Accentra 8805FL storeroom lock from the 8800 Series. The Sargent 7925 covers dormitory exit function with a single cylinder deadbolt.
15) Why choose the 45H over the BEST 47H series?
The difference is the security rating. The 45H meets ANSI A156.13 Series 1000 Grade 1 Operation and Strength with Grade 2 Security, and reaches Grade 1 Security only when paired with a drill resistant core such as 1CD or 1CDP under escutcheon trim. The 47H is rated Grade 1 for Operational, Strength and Security outright. If the spec calls for Grade 1 security without qualification, the 47H settles it; if you are already standardizing on drill resistant cores, the 45H gets you there.
16) Does the BEST 45H meet accessibility requirements for lever operation?
BEST states the design and operation of the mortise lock meets the intent of ANSI A117.1 section 404.2.6. Lever styles matter for the feel at the opening: the lever return spring sits in the trim rather than the case, which protects against lever droop on high traffic doors. The 4 round knob option is not a lever, so avoid it where a lever-style operator is required.
17) I only need a deadbolt, not a latch and lever. What takes the place of the BEST 45H CHB?
The 45H CHB is a complete mortise lock with lever or knob trim and a keyed double cylinder function. If the opening needs only a keyed bolt, the Sargent 4874 is a double cylinder mortise deadbolt on a 2-3/4 inch backset, matching the 2-3/4 inch backset the 45H uses, and the Kaba Ilco 185 Series is a non-handed mortise deadbolt.
18) What is the difference between the BEST 45H CHB and the Hager 3800 Series escutcheon mortise locks?
Both are mortise locks on a 2-3/4 inch backset with escutcheon trim. The BEST 45H CHB is keyed with a double cylinder holdback function and is prepped for a small format interchangeable core. The Hager 3810E is a passage function mortise lock with escutcheon for doors 1-3/4 inch to 2-1/2 inch, and the Hager 3850E is an office function mortise lock with lever and escutcheon that is non-keyed, so neither takes a cylinder.
19) Which mortise locks look like substitutes for the BEST 45H CHB but will not lock a door?
Several mortise-family items are trim only or non-latching. The Emtek 3019 Brisbane, 3102 Memphis, 3104 Hamilton and 3106 Manhattan mortise entrance locksets are dummy function, and the Schlage L0170 is a Grade 1 half dummy trim. The Sargent 130KB and 130W are mortise thumbturns, not locks. The BEST 45H CHB by contrast is a keyed double cylinder lock with a 1 inch throw deadbolt and 3/4 inch throw latchbolt.
20) What is a simpler non-keyed mortise lock to use where the BEST 45H CHB's double cylinder is more than the opening needs?
The BEST 45H CHB is a keyed double cylinder lock prepped for a small format interchangeable core. Where no key is wanted, the Schlage PM010 is a Grade 1 non-keyed passage latch mortise lock for 1-3/4 inch doors, the Falcon MA101 is a Grade 1 heavy duty mortise passage lock with field reversible operation and a fire rating, and the Hager 3840S is a Grade 1 privacy mortise lock on a 2-3/4 inch backset for doors 1-3/4 inch to 2 inch.
21) Can the BEST 45H CHB replace a Marks USA 21AC or 22AC on an ornamental iron gate door?
No. The BEST 45H CHB standard configuration is built for doors 1-3/4 inch thick, with a thick door version available up to 5 inch. The Marks USA 21AC and 22AC entrance double cylinder ornamental iron mortise locks are for 1 inch thick stiles, which is well below the 45H case range. Both the 21AC and 22AC share the double cylinder keying approach the 45H uses, but the door thickness rules out a swap.
22) Is there a Grade 1 dormitory function mortise lock comparable to the BEST 45H CHB?
Yes. The Sargent 7925 is a Grade 1 heavy duty corridor/dormitory exit function mortise lock in the 7900 Series with rose trim and a single cylinder deadbolt. The BEST 45H CHB is also heavy duty but is a double cylinder keyed holdback function with escutcheon trim in wrought, forged, or forged concealed cylinder styles.
23) How durable is the BEST 45H case for a high-traffic commercial door?
Case, cover and armored front are 0.095 inch cold rolled steel, zinc dichromate plated for corrosion resistance. Four case cover screws, one at each corner, plus an interlocking armored front and cover at the latch, hold the case together under abuse, and the armored front wraps both latch and deadbolt for lateral strength. The hub runs on roller bearings for wear resistance. It is catalogued as heavy duty commercial hardware.
24) Does the Codelocks CL2255 work as a light-duty alternative to the BEST 45H CHB?
They serve different traffic levels. The BEST 45H is a heavy duty commercial mortise lock with a 0.095 inch cold rolled steel case. The Codelocks CL2255 is a medium duty electronic tubular mortise latch in the CL2000 Series with a brushed steel finish, so it is a lighter mechanism and is not a match for high-traffic commercial openings where the 45H is specified.
How fast can I get the BEST 45H7CHB3J626 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 45H7CHB3J626 come with a warranty?
Absolutely. The BEST 45H7CHB3J626 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 45H7CHB3J626?
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 45H7CHB3J626 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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