BEST 45H Series Heavy Duty Mor...
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$1,394.00
$1,222.49
BEST BEST 45H Series (RHB - Classroom Holdback Function) - Rose Trim Heavy Duty Mortise Lock, Single Keyed BES-45H-RHB-RS

BEST 45H Series Heavy Duty Mortise Lock with Classroom Holdback Function and Rose Trim

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Model: 45H0RHB15H626
$1,394.00
$1,222.49
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,394.00
$1,222.49
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BEST 45H Series Heavy Duty Mortise Lock with Classroom Holdback Function and Rose Trim

Professional Grade Mortise Lock Solution

The BEST 45H Series Heavy Duty Mortise Lock delivers commercial-grade security with classroom holdback functionality and rose trim design. Featuring a 2-3/4" backset and 8" H x 1-1/4" W x 1/16" T stainless steel faceplate, this Grade 1 mortise lock is engineered for demanding commercial applications. The solid one-piece stainless steel anti-friction latch provides 50% more surface contact with strike for superior strength, while the 0.095" cold rolled steel case construction ensures exceptional durability.

Professional Features & Benefits

  • Heavy-Duty Construction: 0.095" cold rolled steel case, cover, and armored front provide exceptional strength and durability for high-traffic commercial applications.
  • Enhanced Latch Design: Solid one-piece stainless steel anti-friction latch delivers 50% more surface contact with strike for superior strength and security with precision-engineered curve for enhanced cycle life.
  • Grade 1 Performance: ANSI A156.13 Series 1000 Grade 1 Operation and Strength, Grade 2 Security certification ensures professional-grade reliability and compliance.
  • Reversible Operation: Non-handed design with reversible latch that rotates 180 degrees for easy handing change without opening case, plus four position hub toggle for flexible configuration.
  • Roller Bearing Mechanism: Smooth, wear-resistant operation with lever return spring mechanism located in trim for enhanced protection against lever droop.
  • Armored Front Protection: Completely surrounds latch and deadbolt providing increased lateral strength with staked assembly design for self-alignment during installation.
  • Enhanced Security Features: Solid machined cylinder rings with wavy washer provides resistance to wrenching, plus cylinder security screw prevents removal without first removing interchangeable core.
  • Antimicrobial Options: Available with UltraShield antimicrobial protected coating (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 (standard 1-3/4" or thick door configuration up to 5"), mortise pocket dimensions, and handing requirements.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for the 2-3/4" backset configuration.
  3. Prepare door mortise pocket and drill required holes for cylinder, trim mounting, and through-bolts per manufacturer specifications.
  4. Install case assembly into mortise pocket and secure with provided fasteners, ensuring armored front self-aligns with door bevel during installation.
  5. Install trim components using self-aligning trim mechanism for accurate positioning and secure with appropriate hardware.
  6. Configure four position hub toggle to determine locking operation for each hub (always locked, always unlocked, or locked by key) based on application requirements.
  7. Test lock operation including latch and deadbolt function, key operation, and lever return mechanism. Verify proper alignment and smooth operation throughout full range of motion. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

  • Educational Facilities and Classroom Security
  • Commercial Office Buildings
  • 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 solid stainless steel components engineered for demanding commercial applications. The Grade 1 ANSI certification and enhanced latch design with 50% more strike contact ensure dependable performance where security and durability are essential. Advanced features like roller bearing mechanisms and self-aligning installation components demonstrate BEST’s commitment to professional hardware solutions.

Manufacturer Resources

Precision 2000 Series Catalog

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:
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 45H0RHB15H626 – Frequently Asked Questions

1) What does the classroom holdback function on the BEST 45H RHB mortise lock actually do?
Classroom holdback means the outside lever can be locked or unlocked by key, and the key can hold the outside lever in the unlocked (held back) state so the room stays free-entry until someone keys it back. The inside lever always retracts the latch for egress. On the 45H the four position hub toggle sets each hub independently, so a hub can be always locked, always unlocked, or locked by key.
2) Will the BEST 45H mortise lock fit a 1-3/4 inch door, and what about thicker doors?
Standard configuration is built for 1-3/4 inch doors, which is the usual commercial thickness. For anything thicker, BEST builds a thick door configuration up to 5 inches, but you have to specify the door thickness when you order. Backset is 2-3/4 inches, the standard commercial mortise backset.
3) Does the BEST 45H come with a cylinder core, or do I have to supply one?
It ships prepped for a small format interchangeable core, less core. You supply the SFIC core keyed to your system. It's a single cylinder keyed function, so one keyed side. Note that the cylinder security screw cannot be removed until the interchangeable core is pulled first.
4) Do I need to order the BEST 45H mortise lock handed?
No. The 45H is non-handed. The latch is reversible and rotates 180 degrees to change handing without opening the case, and the auxiliary bolt is non-handed stainless steel. The lock face also self-adjusts to the door bevel during install, so one part number covers left and right hand openings.
5) Is the BEST 45H Grade 1, and what do I have to do to get Grade 1 security?
The 45H is certified to ANSI A156.13, Series 1000, Grade 1 Operation and Strength, Grade 2 Security. To reach Grade 1 Security you have to use a drill resistant core (1CD, 1CDP, 1CDF or 1CDX) with escutcheon trims, or a 1EK7K4 high security cylinder with sectional trims. If Grade 1 security is a hard spec line, the 47H Series is Grade 1 for operation, strength and security out of the box.
6) What rose trim sizes and lever styles do I have to pick when ordering a BEST 45H?
Three rose options: H is a 2-3/4 inch flat rose, R is a 2-3/4 inch concave rose, and S is a 3-1/2 inch flat rose. Pick the larger 3-1/2 inch S rose when you need to cover old trim marks or a wider prep. Lever choices are 12 solid tube with no return, 3 solid tube with return, contour with angle return, curved with return, curved without return, and gull wing; 4 is a round knob rather than a lever. For lever-required ADA openings pick a lever, not the 4 knob.
7) I need classroom security with keypad or credential control instead of a keyed classroom mortise lock. What are the options?
Several electronic mortise locks cover classroom function. The Alarm Lock DL3500CR is a Grade 1 Trilogy electronic mortise lock with 300 user codes and classroom function for doors 1-5/8 to 1-7/8 inches, and the DL2700CR is a Grade 1 Trilogy T2 classroom-function mortise lock in a weatherproof design for the same door range. The TownSteel FME-2000 is a Grade 1 heavy duty classroom mortise lockset with RFID for 1-3/4 inch doors, and the FME-4000 adds intruder classroom function with RFID. The BEST 45H is a non-electronic keyed mortise lock, so any of these changes the door from mechanical key control to credential or code control.
8) I need the outside lever electrically controlled on a mortise lock. What replaces a mechanical 45H?
The Command Access ML190 is a heavy duty motorized mortise lock with field selectable electrically locked or unlocked operation on 24VDC, storeroom function. The Schlage L9092EU with 03A trim is a heavy duty mortise lock with electric unlock of the outside lever, keyed outside, request-to-exit switch, 12/24VDC, for 1-3/4 inch doors. The BEST 45H is a non-electronic lock, so either option adds power and wiring to the door.
9) Which finish should I specify for a hospital or school where surfaces get wiped down constantly?
BEST offers two UltraShield antimicrobial finishes, 626AM satin chrome and 630AM satin stainless steel, with a coating that inhibits bacteria and microbe growth on the hardware surface. BEST recommends them for healthcare, elderly care, education, transportation, food service and hospitality. The other thirteen standard finishes run from 605 bright brass through 630 satin stainless and 690 dark bronze.
10) I need a classroom mortise lock but not a BEST keyway. What else is there?
Several mechanical Grade 1 classroom mortise options: the Corbin Russwin ML2003 in the ML2000 Series and the Cal-Royal NM8070, both rated Grade 1 classroom for 1-3/4 inch doors. If you want a keypad instead of keys, Alarm Lock's DL3500CR is a Grade 1 electronic classroom mortise for 1-5/8 to 1-7/8 inch doors, and TownSteel's FME-2000 Series is a Grade 1 classroom mortise with RFID for 1-3/4 inch doors. The BEST 45H itself is purely mechanical, no electronics.
11) Is the BEST 45H tough enough for a high-traffic school corridor?
It's built as heavy duty commercial hardware: 0.095 inch cold rolled steel case, cover and armored front, zinc dichromate plated for corrosion resistance, with a solid one-piece stainless steel anti-friction latch that BEST says gives 50 percent more contact with the strike. The lever return spring sits in the trim rather than the case, which is what keeps levers from drooping after heavy cycling, and the hub runs on roller bearings.
12) I'm standardizing a building on BEST 45H mortise locks. Can I mix functions and keep the same trim look?
Yes. The 45H is one series with function determined by the lock body, so a classroom holdback opening, a storeroom, and an office opening can all carry the same rose and lever and the same finish across the building. Pick one rose (2-3/4 flat, 2-3/4 concave, or 3-1/2 flat), one lever style, and one finish and it repeats across functions. Since every 45H is SFIC prep less core, all of them key into a single interchangeable core system.
13) Does the BEST 45H mortise lock meet accessibility requirements for reach and operation?
BEST states the design and operation of the 45H mortise lock meets the intent of ANSI A117.1 section 404.2.6, which covers door hardware operation. Specify one of the lever trims rather than the 4 round knob to keep the opening operable without tight grasping.
14) The opening does not need classroom function, just a lock that stays locked outside with key access. What should I use instead of the 45H classroom holdback?
For a storeroom opening, the Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series with an Arcadia lever, and the Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset for 1-3/4 inch doors with an interchangeable core option. If the door instead needs an office or entrance function, the Cal-Royal NM8050 is a Grade 1 office/entrance mortise lockset with auxiliary deadlatch. All three are keyed mortise locks like the 45H, which is a single-cylinder keyed unit.
15) What mortise lock should I use on a restroom or bedroom door where the 45H classroom lock is not appropriate?
Privacy function is the match there. The Cal-Royal NM8440 is a Grade 1 privacy/bed/bath 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 for doors 1-3/4 to 2 inches. The BEST 45H is a keyed classroom holdback lock, so it is keyed from the outside rather than thumbturn-operated.
16) Can I use a Schlage PM010 or L0170 in place of a BEST 45H mortise lock?
No, those are not keyed substitutes. The Schlage PM010 is a Grade 1 non-keyed passage latch mortise lock for 1-3/4 inch doors, and the L0170 is a Grade 1 half dummy trim with no locking function at all. The BEST 45H is a keyed single-cylinder mortise lock, so it takes a cylinder the passage and dummy units do not accept.
17) What passage-function mortise locks pair with a BEST 45H on openings that do not need to lock?
For free-swinging doors in the same run, the Falcon MA101 is a Grade 1 heavy duty mortise passage lock with field reversible operation and a fire rating, the Hager 3810S is a Grade 1 passage mortise lock with rose trim and a 2-3/4 inch backset matching the 45H backset, and the Hager 3810E is the same passage lock with escutcheon trim for doors 1-3/4 to 2-1/2 inches. TownSteel MRX-L-01 and MRX-A-01 are Grade 1 heavy duty passage mortise locksets with anti-ligature lever and arch trim for behavioral health openings.
18) Can a Baldwin 6310 or 6301 mortise lock body go where a BEST 45H goes?
Not without changing the door prep. The Baldwin 6310 entrance/storeroom and 6301 entrance/apartment mortise lock bodies use a 2-1/2 inch backset, while the BEST 45H is a 2-3/4 inch backset lock. The Baldwin bodies come in knob-by-knob and lever-by-lever versions, with the 6310 listed for doors 1-3/8 inch and over and the 6301 for 1-3/4 inch and over.
19) What mortise product do I order if I only need a deadbolt and not a latch with levers?
The Sargent 4874 is a double cylinder mortise deadbolt with a 2-3/4 inch backset, matching the 45H backset, and the Kaba Ilco 185 Series is a non-handed mortise deadbolt sold in a single pack. For a keypad deadbolt, the Alarm Lock DL4500 is a Grade 1 electronic mortise deadbolt with 2,000 user codes and privacy keypad for doors 1-5/8 to 1-7/8 inches. The BEST 45H is a latching lockset with lever or knob trim rather than a deadbolt-only body.
20) For a healthcare corridor, how does the BEST 45H compare with push/pull mortise trim?
The Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset in satin stainless steel, ligature resistant and ADA compliant, with no key control on the door. The BEST 45H is a keyed classroom holdback lock and is offered in 626AM satin chrome and 630AM satin stainless antimicrobial finishes for cleanliness-sensitive areas. Choose the paddleset where hands-free passage is the requirement and the 45H where the room must be securable by key.
21) I need a lock for a thin ornamental iron door. Will a BEST 45H work?
The BEST 45H standard configuration is built for 1-3/4 inch doors, with a thick door configuration available up to 5 inches. For a 1 inch door, the Marks USA 21AC and 22AC are entrance double cylinder ornamental iron mortise locks with round knob, both listed for 1 inch door thickness.
22) Does the BEST 45H classroom holdback lock include a deadbolt?
Yes, it has a stainless steel deadbolt with a 1 inch throw alongside the 3/4 inch stainless latchbolt, and the armored front wraps both for lateral strength. If all you need is a deadbolt on the opening and no latching lever, that's a different animal, a Sargent 4874 double cylinder mortise deadbolt on a 2-3/4 inch backset, or the Kaba Ilco 185 Series.
23) Are the Dormakaba E-Plex and Saffire mortise locks alternatives to a BEST 45H?
They are credential-based alternatives rather than direct swaps. The Dormakaba E-Plex 2066 is an electronic pushbutton keyless mortise lock for wide stile applications, the E5086 is a Grade 1 back-to-back pushbutton and card lock with entry/egress function, the PowerPlex P2066 is a mortise lock in the PowerPlex 2000 Series, and the Saffire LX-I-M002 is an RFID mortise lockset with BLE mobile access at BHMA Grade 2. The BEST 45H is a mechanical keyed lock rated Grade 1 for operation and strength under ANSI A156.13 Series 1000, so moving to any of these changes how access is granted and administered.
24) Which products that show up in mortise lock searches are not locksets at all?
A few. The Sargent 130KB and 130W are mortise thumbturns, standard duty trim pieces in the 8200 and 7800 Series respectively. The Falcon MESC600DT is a dummy escutcheon lever trim for M9900 Series exit devices. The Emtek 3019 Brisbane, 3102 Memphis, 3104 Hamilton and 3106 Manhattan are dummy mortise entrance locksets with no working latch. The Kaba Ilco BR Series is a glass door bottom rail lock. None of these replace a BEST 45H, which is a keyed mortise lockset.
How fast can I get the BEST 45H0RHB15H626 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 45H0RHB15H626 come with a warranty?
Absolutely. The BEST 45H0RHB15H626 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 45H0RHB15H626?
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