BEST 45HCA Series Heavy Duty M...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$586.00
$363.33
BEST BEST 45HCA Series (INL - Intruder Function) - Heavy Duty Mortise Lockbody Only, Field Reversible 45HCAINL

BEST 45HCA Series Heavy Duty Mortise Lockbody with Intruder Function

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Model: 45HCAINL626
$586.00
$363.33
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$586.00
$363.33
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BEST 45HCA Series Heavy Duty Mortise Lockbody with Intruder Function

Professional-Grade Mortise Lock Case for Commercial Security Applications

The BEST 45HCA Series mortise lockbody delivers heavy-duty security with intruder function capability for demanding commercial applications. This field-reversible lock case features a solid one-piece stainless steel anti-friction latch with 1" deadbolt throw and 3/4" latchbolt throw, designed for doors 1-3/4" thick with 2-3/4" backset. Manufactured from 0.095" cold rolled steel with zinc dichromate plating, this ANSI A156.13 Grade 1 Operation and Strength rated lockbody provides superior durability and security performance.

Professional Features & Benefits

  • Heavy-Duty Steel Construction: 0.095" cold rolled steel case, cover, and armored front with zinc dichromate plating for exceptional strength and corrosion resistance.
  • Superior Latch Design: Solid one-piece stainless steel anti-friction latch provides 50% more surface contact with strike for enhanced security and precision-engineered curve for extended cycle life.
  • Field-Reversible Operation: Reversible latch rotates 180 degrees for easy handing change without opening case, with four position hub toggle design for flexible configuration.
  • Enhanced Case Integrity: Four case cover screws at each corner plus interlocking armored front and cover design provide maximum structural strength.
  • Roller Bearing Hub Mechanism: Smooth, wear-resistant operation with lever return spring mechanism in trim for enhanced protection against lever droop.
  • Grade 1 Performance Rating: ANSI A156.13 Series 1000 Grade 1 Operation and Strength certification for demanding commercial applications.
  • Comprehensive Security Features: Solid machined cylinder rings with wavy washer provide wrenching resistance, cylinder security screw prevents core removal.
  • Professional Installation Features: Self-aligning trim mechanism and armored front design for fast, accurate installation with automatic bevel adjustment.

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), backset dimensions, and handing requirements.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for proper mortise preparation.
  3. Prepare door mortise cavity according to case dimensions (5-7/8" H x 7/8" D x 4-1/16" W) and drill required holes per manufacturer specifications.
  4. Install lockbody in mortise cavity and secure with appropriate fasteners per manufacturer torque specifications, ensuring proper alignment with door edge.
  5. Configure four position hub toggle settings for desired operation (always locked, always unlocked, or locked by key) and verify latch reversibility if handing change is required.
  6. Test lockbody operation to verify proper latch and deadbolt function, smooth hub operation, and proper alignment. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

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

Why Choose BEST Quality?

BEST 45HCA Series mortise lockbodies deliver professional-grade reliability with heavy-duty 0.095" cold rolled steel construction and ANSI A156.13 Grade 1 certification for demanding commercial applications. The precision-engineered stainless steel latch and roller bearing hub mechanism provide superior durability and smooth operation. Engineered for high-security environments where dependable performance and field serviceability are essential.

Product Specs

Series:
40H Series
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
Lock Function:
Intruder
Product Attribute:
Mortise Locks
Electronic:
No
Product Function:
Intruder
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 45HCAINL626 – Frequently Asked Questions

1) What does the intruder function on the BEST 45HCA mortise lock actually do?
The 45HCA is an intruder-function lockbody, which is the classroom-security setup: it's a double-cylinder keyed lock, so a key on either side throws or retracts the deadbolt. That means a teacher can lock the door from inside the room without stepping into the corridor. The 45HCA ships as the lock case only, so you order trim and cores separately, and the case comes SFIC prepped less core for a BEST small format interchangeable core.
2) Do I need to specify handing on a BEST 45HCA lock case, and can I change it later?
Handing is a required selection when ordering, with right hand, left hand, right hand reverse bevel and left hand reverse bevel offered. But the latch on the 45HCA reverses in the field by rotating 180 degrees without opening the case, so a lock ordered one hand can be turned around on site if the opening changes. Handy on a retrofit where the door swing on the drawing doesn't match the door.
3) What size mortise pocket does the BEST 45HCA lock case need?
The case measures 5-7/8 inches H x 7/8 inch D x 4-1/16 inch W, so the mortise pocket has to be prepped to those dimensions. The faceplate is 8 x 1-1/4 x 1/16 inches and self-adjusts to the door bevel during installation, so you don't have to hand-fit the face to a beveled edge.
4) Will the BEST 45HCA latch into my existing mortise strike?
The latchbolt throws 3/4 inch and the deadbolt throws a full 1 inch, both stainless steel, on a 2-3/4 inch backset. Those are the standard ANSI mortise numbers, so an existing ANSI mortise strike prep in the frame will normally take it. If your frame lip is short or the door is set back, there's a 7/8 inch lip-to-center strike option to select when ordering.
5) Is the BEST 45HCA Grade 1, and what does it take to get Grade 1 security?
The 45H Series carries ANSI A156.13 Series 1000, Grade 1 Operation and Strength, with Grade 2 Security as furnished. To reach Grade 1 Security you have to add hardware: a drill resistant core (1CD, 1CDP, 1CDF or 1CDX) with escutcheon trim, or a 1EK7K4 high security cylinder with sectional trim. If the spec on your drawing says Grade 1 security outright, the 47H Series is the one rated Grade 1 for operation, strength and security together.
6) What else do I have to order with a BEST 45HCA to finish the door?
The 45HCA is the lock case on its own. You'll still need trim (lever or knob with rose or escutcheon), two cores since it's a double cylinder function, and a strike. Handing is required on the order, and there are two add-ons to decide: security head screws, and the 7/8 inch lip-to-center strike. Thick doors above 1-3/4 inches also need the thickness called out on the order.
7) Does the BEST 45HCA take a small format interchangeable core, and does it come with one?
It's prepped for a small format interchangeable core and ships less core, so the core is a separate line. That's the point for a property manager or a locksmith running a master key system: you drop your own SFIC in and the opening joins the existing keyway without rekeying anything else. A cylinder security screw locks the core in place against removal.
8) What is the closest mechanical equivalent to a BEST 45HCA intruder mortise lock if I need a lockdown-capable classroom opening from another manufacturer?
The BEST 45HCA is a mechanical intruder-function mortise lockbody, keyed double cylinder, with a 2-3/4 inch backset and SFIC prep less core. The nearest mechanical peers are classroom-function mortise locks that let the outside lever be locked by key: the Cal-Royal NM8070 is a heavy duty Grade 1 classroom mortise lockset for 1-3/4 inch doors, and the Corbin Russwin ML2003 is a Grade 1 mortise classroom lockset in the ML2000 Series, also for 1-3/4 inch doors. Both differ from the 45HCA in that they are complete locksets with trim, where the 45HCA is the lock case itself, and neither carries the intruder designation that lets the door be secured from the inside.
9) I want an intruder classroom lock with credential control instead of keys. What are my options?
The BEST 45HCA handles intruder function mechanically, with a double cylinder keyed configuration and SFIC prep less core, so lockdown is done with a key on either side. If the facility wants credential-based control instead, the TownSteel FME-4000 Series is an electronic intruder classroom mortise lockset with RFID technology, heavy duty and Grade 1 for 1-3/4 inch doors. It covers the same lockdown intent with cards rather than keys and needs the power and credential program that goes with an electronic lock.
10) Is a mortise deadbolt like the Sargent 4874 a substitute for the BEST 45HCA intruder lockbody?
No. The Sargent 4874 is a double cylinder mortise deadbolt in the 4870 Series with a 2-3/4 inch backset, so it shares the backset and the double cylinder keying with the BEST 45HCA but provides bolt only, with no latchbolt and no lever hub. The 45HCA is a mortise lockbody with intruder function that handles both latching and deadbolting in one case. The 4874 is the right part when a deadbolt is being added above existing hardware, not when one case has to do the whole job.
11) Which BEST 45HCA finish should I use in a hospital or a school?
For healthcare, elderly care, education, food service and similar cleanliness-driven jobs, BEST offers two antimicrobial options: 626AM satin chrome and 630AM satin stainless, both with the UltraShield coating that inhibits bacterial growth on the hardware surface. Standard finishes run 605, 606, 611, 612, 613, 618, 619, 622, 625, 626, 629, 630 and 690. Two behave differently over time: 613 oil rubbed bronze is meant to wear to an antique look, and 690 stays a dark brown.
12) Is there a mechanical alternative to an electronic classroom intruder lock?
Yes, and that's exactly what the BEST 45HCA is. It gets you classroom-security lockdown from inside the room with a key and no wiring, batteries or credentials. The electronic route is a different animal: TownSteel's FME-4000 Series is an electronic intruder classroom mortise lockset with RFID, and it is listed Grade 1 heavy duty for 1-3/4 inch doors. Pick the electronic one if you need audit trail or credential management; pick the 45HCA if you want a keyed lock case that just works.
13) I don't need the intruder function, just a Grade 1 mortise lock for a classroom or storeroom. What else is there?
Plenty, if intruder lockdown isn't the requirement. Corbin Russwin's ML2003 is a Grade 1 mortise classroom lockset for 1-3/4 inch doors. Cal-Royal's NM8070 is a Grade 1 classroom mortise lockset with auxiliary deadlatch and the NM8080 is the storeroom version with an interchangeable core option, both for 1-3/4 inch doors. Accentra's 8805FL is a Grade 1 storeroom mortise lock with the Arcadia lever. Those come as complete locksets, where the 45HCA is a lock case you build up with your own trim and cores.
14) If the opening only needs to stay locked from the outside and free from the inside, is there a simpler mortise lock than the 45HCA?
Yes. A storeroom-function mortise lock covers that opening without the double cylinder keying the BEST 45HCA uses for intruder function. The Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series supplied with an Arcadia lever, and the Cal-Royal NM8080 is a heavy duty Grade 1 storeroom mortise lockset for 1-3/4 inch doors with an interchangeable core option, which suits a facility already keyed to interchangeable cores like the SFIC prep the 45HCA is built for.
15) What mortise lock should I use on a dormitory or corridor door instead of an intruder lock?
The Sargent 7925 is a dormitory exit function mortise lock in the 7900 Series, Grade 1 and heavy duty, supplied with rose trim and a single cylinder deadbolt. Dormitory function suits a corridor door where the occupant throws the deadbolt from inside, which is a different pattern from the BEST 45HCA, a double cylinder intruder-function lockbody keyed on both sides.
16) I need the same opening tied into an access control system with remote lock and unlock. What replaces a mechanical intruder mortise lock?
Two electrified mortise locks cover that. The Command Access ML190 Series is a motorized mortise lock with field selectable fail secure or fail safe operation on 24VDC, storeroom function and heavy duty. The Schlage L9092EU with 03A trim is a heavy duty electric lock and unlock outside lever mortise lock for 1-3/4 inch doors, keyed outside, with request to exit and 12 or 24VDC operation. Both require power transfer at the hinge and a controller, where the BEST 45HCA is a non-electronic lockbody that works with keys alone.
17) Can a standalone keypad lock like the Alarm Lock DL3500CR do the job of an intruder mortise lock?
The Alarm Lock DL3500 Series is a Grade 1 electronic mortise lock with classroom function and 300 user codes, for doors 1-5/8 to 1-7/8 inch thick. It manages access by code rather than key and its door thickness range is narrower than the BEST 45HCA standard configuration for 1-3/4 inch doors. Choose the DL3500CR when code management matters more than key-based lockdown; choose the 45HCA when the opening is to stay on the facility SFIC key system, since it comes with SFIC prep less core.
18) Is the Schlage PC10 a drop-in alternative to the BEST 45HCA?
No. The Schlage PC10 is a Grade 1 passage cylindrical lock, non-keyed with rose, for 1-3/4 inch doors. It is a cylindrical lock and takes a bored door prep, not the mortise pocket the BEST 45HCA needs, and it is non-keyed where the 45HCA is a keyed double cylinder lockbody. A door already mortised for the 45HCA cannot take the PC10 without changing the door prep.
19) How durable is the BEST 45HCA case for a high-traffic opening?
The case, cover and armored front are 0.095 inch cold rolled steel, zinc dichromate plated for corrosion resistance, with four cover screws at the corners and an interlocking armored front and cover. The latch is solid one-piece stainless with a machined curve for cycle life, and the hub runs on roller bearings with a lever return spring in the trim to fight lever droop. That's the heavy-duty commercial build, not a light-commercial case.
20) Can the BEST 45HCA be set to stay locked or stay unlocked without changing the lock?
There's a four position hub toggle inside the case that sets the operation: always locked, always unlocked, or locked by key. So one lock case covers several day-to-day modes on the same opening without swapping hardware. It gets configured during installation.
21) Does the BEST 45HCA meet accessibility requirements for a school or public building?
BEST states the design and operation of its mortise lock meets the intent of ANSI A117.1 section 404.2.6, the accessible door hardware provision. Operating force and reach are still a function of the trim you pair with it, so specify a lever trim rather than a knob on an accessible opening.
22) For a behavioral health or patient room, what mortise lock should I look at instead of the 45HCA?
TownSteel offers ligature-resistant mortise locksets for those rooms: the MRX-A-01 is a passage function stainless steel ligature resistant arch trim mortise lockset, and the MRX-L-01 is a Grade 1 heavy duty anti-ligature lever mortise lockset in stainless steel, both for 1-3/4 inch doors. The Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset, ligature resistant and ADA compliant in satin stainless steel. These address trim shape for patient safety; the BEST 45HCA is a heavy duty intruder lockbody for doors that need keyed lockdown.
23) What is the difference between the BEST 45HCA and a mortise dummy trim like the Schlage L0170?
The Schlage L0170 is a half dummy trim, a Grade 1 mortise non-keyed lever lock in the L Series, heavy duty, for 1-3/4 inch doors, and Emtek offers dummy mortise entrance locksets such as the 3019 Brisbane, 3102 Memphis, 3104 Hamilton and 3106 Manhattan. Dummy trim is fixed and does not latch or lock, so it is used on an inactive leaf. The BEST 45HCA is a working lockbody with intruder function and a keyed double cylinder.
How fast can I get the BEST 45HCAINL626 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 45HCAINL626 come with a warranty?
Absolutely. The BEST 45HCAINL626 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 45HCAINL626?
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
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