BEST 45H Series INL Heavy Duty...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,513.00
$955.00
BEST BEST 45H Series (INL - Intruder Latch Function) - Escutcheon Trim Heavy Duty Mortise Lock, Double Keyed BES-45H-INL-ES

BEST 45H Series INL Heavy Duty Mortise Lock with Escutcheon Trim Double Keyed

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Model: 45H7INL3J626
$1,513.00
$955.00
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,513.00
$955.00
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BEST 45H Series INL Heavy Duty Mortise Lock with Escutcheon Trim Double Keyed

Professional Grade Mortise Lock with Intruder Latch Function

The BEST 45H Series INL mortise lock delivers commercial-grade security with intruder latch function and escutcheon trim design. Featuring a solid one-piece stainless steel anti-friction latch with 50% more surface contact, this heavy duty mortise lock provides superior strength and security for demanding applications. Built with 0.095" cold rolled steel case construction and 2-3/4" backset, the lock meets ANSI A156.13 Series 1000 Grade 1 Operation and Strength standards with Grade 2 Security rating.

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: Case, cover, and armored front manufactured from 0.095" cold rolled steel with zinc dichromate plating for corrosion protection and durability.
  • 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 maximum structural strength.
  • Cylinder Security Features: Solid machined cylinder rings with wavy washer provides resistance to wrenching with security screw preventing removal without first removing interchangeable core.
  • Self-Aligning Installation: Trim mechanism and faceplate automatically adjust for fast, easy, and accurate installation with proper door bevel alignment.
  • ANSI Compliance: Meets ANSI A156.13 Series 1000 Grade 1 Operation and Strength, Grade 2 Security standards for commercial 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 up to 5" thick door configuration), stile width, and handing as applicable to this mortise lock.
  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 and frame by drilling required holes and routing as specified in manufacturer instructions for 2-3/4" backset configuration.
  4. Install all mounting hardware and secure the device to door and frame per manufacturer torque specifications, utilizing the self-aligning trim mechanism.
  5. Adjust operational components including the four position hub toggle for proper alignment, latching, and smooth operation throughout the full range of motion.
  6. Test device operation to verify proper function of the reversible latch, deadbolt throw, and locking mechanisms. Make final adjustments as needed and 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

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 precision-engineered anti-friction latch design provides enhanced cycle life with reduced wear, while ANSI A156.13 Series 1000 Grade 1 compliance ensures dependable performance where security and durability are essential. Multiple finish options including antimicrobial UltraShield coatings provide versatility for specialized applications.

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 45H7INL3J626 – Frequently Asked Questions

1) Will the BEST 45H mortise lock fit a 1-3/4 inch door, and what about thicker doors?
The 45H mortise lock in its standard configuration is built for 1-3/4 inch doors, which is the usual commercial thickness. For anything heavier, BEST makes a thick door configuration covering doors up to 5 inches, but the thickness has to be specified at the time of order, so it is not something you adjust in the field. Backset is 2-3/4 inches, and the faceplate is 8 x 1-1/4 x 1/16 inches.
2) What does the INL intruder latch function do on a BEST 45H lock?
INL is the intruder latch function, and on the 45H it is a double cylinder arrangement: keyed on both sides. That means a teacher or staff member can lock the opening from inside with a key without stepping into the corridor, which is the whole point of an intruder function on a classroom or office door. It also means there is no inside thumbturn or free key retraction, so anyone leaving has to have a key for the deadbolt side of the operation. Check that against your local egress requirements for the room type before you standardize on it.
3) Does the BEST 45H mortise lock come with a cylinder or core?
No core is included. The 45H ships prepped for a BEST small format interchangeable core and is supplied less core, so you order the SFIC core separately and key it into your existing system. That is normally an advantage on a large property, since your locksmith can core the lock on site and pull it back out later without touching the lock body. The lock also uses a solid machined cylinder ring with a wavy washer to resist wrenching, and a security screw that cannot be reached until the core is removed.
4) What ANSI grade is the BEST 45H mortise lock, and how do I get it to Grade 1 security?
The 45H meets ANSI A156.13, Series 1000, Grade 1 for Operation and Strength, with a Grade 2 Security rating as standard. To reach Grade 1 Security with escutcheon trim you have to use a drill resistant core, specifically a 1CD, 1CDP, 1CDF or 1CDX. On sectional trims the requirement is different: a 1EK7K4 high security cylinder. If your spec calls out Grade 1 security outright, the 47H Series is the model that carries Grade 1 for operation, strength and security without the core upgrade.
5) What do I have to specify when ordering a BEST 45H INL mortise lock?
Four decisions. Trim style, which is J wrought escutcheon, M forged escutcheon, or N forged escutcheon with concealed cylinder. Lever or knob style, from 12 solid tube no return, 3 solid tube with return, 4 round knob, contour with angle return, curved with return, curved without return, or gull wing. Finish, from 605 through 690 including the two antimicrobial options. And door thickness if the door is anything other than 1-3/4 inches, since the thick door build goes to 5 inches and has to be called out. You also order the SFIC core separately.
6) I need an intruder or classroom security lock. What are my options besides the BEST 45H INL?
The 45H INL handles it mechanically, double keyed, no batteries or wiring involved. If you want the same job done electronically with credentials and audit, TownSteel's FME-4000 Series is an electronic intruder classroom mortise lockset with RFID, Grade 1 heavy duty for 1-3/4 inch doors, and the FME-2000 Series is the Grade 1 RFID classroom version. Marks USA LA318GJ is another mechanical route: a Grade 1 classroom security indicator mortise lockset with an ANSI strike and a steel escutcheon measuring 8-1/2 x 2-3/4 x 7/16 inches, for 1-3/4 inch doors. The indicator matters if staff need to see from the corridor that the room is secured.
7) What is the closest Grade 1 mortise lock to a BEST 45H if the opening needs a plain storeroom function instead of an intruder latch?
The Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series, so it covers the standard storeroom opening where the outside lever is always locked and the key retracts the latch. The BEST 45H is built around the INL intruder latch function and takes a double cylinder keyed configuration, which is a different operating idea: it is intended for openings where the room side needs to be secured deliberately. Both are mortise bodies, so the door prep is the same family of cutout, but the function code drives which one belongs on the door.
8) Which mortise lock should be used for a classroom door instead of a BEST 45H INL?
For a classroom function on a 1-3/4 inch door, the Cal-Royal NM8070 is a heavy duty Grade 1 classroom mortise lockset with an auxiliary deadlatch, and the Corbin Russwin ML2003 is a Grade 1 mortise classroom lockset in the ML2000 Series for the same 1-3/4 inch thickness. The BEST 45H is a double cylinder keyed lock with the INL intruder latch function; its standard configuration is designed for 1-3/4 inch doors, with a thick door configuration available up to 5 inches when specified at order.
9) Is a Sargent 4874 double cylinder mortise deadbolt the same thing as a BEST 45H double keyed mortise lock?
No. The Sargent 4874 is a double cylinder mortise deadbolt in the 4870 Series with a 2-3/4 inch backset - a deadbolt body only, with no lever or knob operation. The BEST 45H is a full mortise lockset with lever or knob trim, a 3/4 inch throw stainless steel latchbolt plus a 1 inch throw deadbolt, and escutcheon trim. Both share the 2-3/4 inch backset, but the 4874 will not give the door a latching handle.
10) Which electronic mortise lock covers an intruder classroom opening if a mechanical BEST 45H is not wanted?
The TownSteel FME-4000 Series is an electronic intruder classroom mortise lockset with RFID technology, heavy duty Grade 1, for 1-3/4 inch doors, and the FME-2000 Series is a Grade 1 heavy duty classroom mortise lockset with RFID on the same thickness. The BEST 45H is a mechanical, non-electronic lock with an SFIC prep less core cylinder, so it needs no power or credential management at the door.
11) Will a Baldwin 6301 mortise lock body drop into the same door prep as a BEST 45H?
No. The Baldwin 6301 entry/apartment mortise lock body uses a 2-1/2 inch backset, while the BEST 45H is a 2-3/4 inch backset lock. The cylinder and spindle holes land in different places, so the door has to be prepped for one or the other. The Baldwin 6301 is offered as knob by knob and, as the 6301LS, lever by lever, both for doors 1-3/4 inch and over.
12) For a behavioral health or ligature resistant opening, what replaces a BEST 45H mortise lock?
The TownSteel MRX-L-01 is a stainless steel Grade 1 heavy duty anti-ligature lever mortise lockset in passage function for 1-3/4 inch doors, and the MRX-A-01 is the satin stainless steel ligature resistant arch trim version of the same passage function. The Marks USA 5PDN is a Grade 1 ligature resistant, ADA compliant hospital passage mortise push/pull paddleset in satin stainless steel. The BEST 45H uses conventional lever and knob trim - solid tube, curved, gull wing and round knob styles - which is not a ligature resistant profile.
13) What mortise lock works for an access controlled opening that must lock and unlock electrically, where a BEST 45H cannot?
The Command Access ML190 Series is a heavy duty motorized mortise lock with field selectable EL or EU operation on 24VDC in storeroom function, and the Schlage L9092EU with 03A trim is a heavy duty electric lock/unlock outside lever mortise lock, keyed outside, with request to exit, on 12 or 24VDC for 1-3/4 inch doors. The BEST 45H is a mechanical lock with no electronic operation, so an electrified opening needs one of those bodies and wiring to the door.
14) Is the BEST 45H handed, and can I change the handing on the job?
Handing is not a problem here. The latchbolt is reversible without opening the case, the auxiliary bolt is non-handed stainless, and the roller bearing hub uses a four position toggle so handing changes are made without cracking the lock open. Practically, that means you can stock one lock for both hands of door across a building and set it at the opening.
15) Which finish should I pick for a hospital or school door, and what is the BEST UltraShield option?
For healthcare, elderly care, education, food service, transportation and hospitality, BEST offers two antimicrobial finishes on the 45H: 626AM, satin chrome with the UltraShield coating, and 630AM, satin stainless steel with UltraShield. The coating inhibits growth of bacteria and other microbes on the hardware surface. If cleanliness is not the driver, the standard range runs 605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 613 oil rubbed, 618 bright nickel, 619 satin nickel, 622 matte black, 625 bright chrome, 626 satin chrome, 629 and 630 stainless, and 690 dark bronze. Note that 613 is meant to wear to an antique look over time, so it is a poor choice if you need a fleet of doors to stay matched.
16) Should I use a mortise lock like the BEST 45H or a cylindrical lockset?
A mortise lock goes into a routed pocket in the door edge and carries both a latchbolt and a separate deadbolt in one case, which is why it is the choice on heavy-traffic commercial openings where you want the deadbolt security and long cycle life. The 45H is a heavy duty commercial mortise lock with a 0.095 inch cold rolled steel case. A cylindrical lock installs through two bored holes instead and is far quicker to retrofit, but it does not give you the separate deadbolt. If your doors are already bored rather than mortised, something like the Schlage PC10 Grade 1 cylindrical lock is the format that drops in; converting a bored door to mortise means a new door or a mortise pocket cut.
17) What is a good alternative to the BEST 45H if I do not want a small format interchangeable core system?
The 45H is prepped specifically for a BEST small format interchangeable core, so it makes most sense when you are already on, or moving to, an SFIC keying system. If you are not, there are Grade 1 mortise locks in conventional cylinder formats: the Corbin Russwin ML2003 classroom mortise lockset and the Cal-Royal NM8070 classroom or NM8080 storeroom locksets are all Grade 1 and listed for 1-3/4 inch doors. Sargent's 7925 dormitory function lock in the 7900 Series is another Grade 1 heavy duty option with a single cylinder deadbolt.
18) Does the BEST 45H meet accessibility requirements for lever operation?
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 clause. Lever options that suit that use include the curved with return, contour with angle return, and gull wing styles; the 4 round knob is a knob and is not the choice where lever operation is required.
19) What is a simpler non-keyed mortise lock to pair with a BEST 45H on doors that do not need to lock?
For the passage and office doors in the same run, the Hager 3810E is a Grade 1 passage mortise lock with escutcheon trim and a 2-3/4 inch backset for 1-3/4 inch to 2-1/2 inch doors, and the Hager 3850E is a Grade 1 office mortise lock with lever and escutcheon, non-keyed, on the same 2-3/4 inch backset. Both match the BEST 45H at 2-3/4 inch backset and use escutcheon trim, so the door prep and the visual line stay consistent while the keyed openings carry the double cylinder 45H.
20) What mortise lock handles a bathroom or bedroom door in a building standardized on BEST 45H hardware?
Privacy openings take a different function: the Cal-Royal NM8440 is a heavy duty Grade 1 privacy 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 1-3/4 inch to 2 inch doors. The BEST 45H INL is keyed on both sides as a double cylinder lock, which is not a privacy arrangement.
21) Can a Schlage PM010 passage latch mortise lock be used where a BEST 45H double keyed lock was specified?
Only if the opening does not need to lock. The Schlage PM010 is a Grade 1 passage latch mortise lock, non-keyed, for 1-3/4 inch doors, and the Falcon MA101 is a Grade 1 heavy duty mortise passage lock with field reversible operation and a fire rating. Neither accepts a key. The BEST 45H is a keyed lock in double cylinder configuration with an SFIC prep less core, so it is the one that secures the opening.
22) Is an Emtek 3104 Hamilton mortise entrance lockset an alternative to a BEST 45H?
No. The Emtek 3104 Hamilton is a dummy function mortise entrance lockset, as are the 3106 Manhattan and 3102 Memphis - dummy trim does not latch or lock and mounts to a door leaf that is held by other means. The BEST 45H is a heavy duty commercial keyed mortise lock in double cylinder configuration with a working latchbolt and deadbolt.
23) Which mortise lock suits a dormitory corridor door rather than a BEST 45H intruder latch lock?
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. It is the corridor arrangement for dorm and apartment entries. The BEST 45H is a double cylinder keyed lock with escutcheon trim in wrought, forged, and forged concealed cylinder styles, so the trim footprint on the door differs from a rose.
24) For a healthcare corridor where surface cleanliness matters, how does a BEST 45H compare to other Grade 1 mortise options?
The BEST 45H is offered in 626AM satin chrome and 630AM satin stainless steel with UltraShield antimicrobial protected coating alongside its standard finishes, and it is a mechanical lock with no electronics at the door. Among Grade 1 peers, the TownSteel FME-2000 Series is a heavy duty classroom mortise lockset with RFID for 1-3/4 inch doors, and the Marks USA 5PDN is a Grade 1 hospital passage push/pull paddleset in satin stainless steel - the paddleset changes how staff operate the door with full hands.
25) Which Grade 1 mortise lock covers an office or entrance opening instead of a BEST 45H double keyed lock?
The Cal-Royal NM8050 is a heavy duty Grade 1 office/entrance mortise lockset with an auxiliary deadlatch for 1-3/4 inch doors, and the Cal-Royal NM8080 is the Grade 1 storeroom version with an interchangeable core option on the same thickness. The BEST 45H comes with SFIC prep less core, so a facility already keyed on small format interchangeable cores can carry that keying across to the NM8080 as well.
26) What makes the BEST 45H hold up on a high traffic door?
Three things carry the wear. The latchbolt is one solid piece of stainless with roughly 50 percent more contact surface against the strike, and it is oil impregnated with a curve profile cut for cycle life rather than just for entry. The case, cover and armored front are all 0.095 inch cold rolled steel, zinc dichromate plated against corrosion, with four cover screws at the corners and the armored front interlocking with the cover at the latch. And the hub runs on roller bearings. On a lobby or corridor door that is cycled hundreds of times a day, the hub and the latch face are what fail first, and both are addressed here.
27) What is the difference between the J, M and N escutcheon trims on a BEST 45H?
All three are escutcheon plates, meaning a single long plate covering the lever and the cylinder rather than separate roses. J is wrought, M is forged, and N is forged with a concealed cylinder. The N option hides the core behind the trim, which is what you want where you do not want the cylinder visible or reachable from the public side. Note that the drill resistant core requirement for Grade 1 security applies to escutcheon trims like these; the high security cylinder requirement is the one that applies to sectional trims instead.
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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 45H7INL3J626 come with a warranty?
Absolutely. The BEST 45H7INL3J626 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 45H7INL3J626?
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