BEST 48H Series Mortise Deadlo...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$548.00
$323.87
BEST BEST 48H Standard Series Mortise Deadlock (K-Single Cylinder Function) 7-Pin Housing, Accepts all BEST Cores BES-48H-K

BEST 48H Series Mortise Deadlock with Single Cylinder Function and 7-Pin Housing

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Model: 48H7K626
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$548.00
$323.87
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BEST 48H Series Mortise Deadlock with Single Cylinder Function and 7-Pin Housing

Heavy-Duty Commercial Mortise Lock Solution

The BEST 48H Series Mortise Deadlock delivers professional-grade security with single cylinder function and 7-pin housing designed to accept all BEST cores. This heavy-duty commercial lock features a 2 3/4" backset, 1" deadbolt throw, and robust construction with 0.095" cold rolled steel case measuring 3-3/8" x 4-3/16" x 1". Engineered for doors 1-3/4" thick with thick door configurations available up to 3" thick.

Professional Features & Benefits

  • Heavy-Duty Case Construction: 0.095" cold rolled steel case, cover, and armored front with zinc dichromate plating for superior strength and corrosion protection.
  • Enhanced Security Design: 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 provides smooth, wear-resistant operation with enhanced cycle life and reduced strike wear.
  • Reversible Configuration: Non-handed cylinder retainer and reversible latch rotates 180 degrees for easy handing change without opening the case.
  • Armored Front Protection: Completely surrounds latch and deadbolt providing increased lateral strength with staked assembly design for self-alignment during installation.
  • Four-Position Hub Toggle: Determines whether each hub is always locked, always unlocked, or locked by key for flexible operation and easy handing changes.
  • Enhanced Case Integrity: Four case cover screws at each corner plus interlocking armored front and cover design at the latch for maximum durability.
  • Cylinder Security Features: Solid machined cylinder rings with wavy washer provides resistance to wrenching, plus cylinder security screw prevents removal without first removing interchangeable core.

Technical Specifications

Case: 0.095" cold rolled steel, 3-3/8" x 4-3/16" x 1". Steel is zinc dichromate plated for corrosion protection.
Faceplate: Brass or bronze material, 5-3/8" x 1-3/16" x 7/32" .
Strike: Brass, bronze, or stainless steel base material.
48HS1: Flat strike supplied standard, 3-1/2" x 1-1/8" x 3/32"
Fits standard door frame cut-out as specified in ANSI A115.5.
48HS2: Lipped strike supplied as option, 4-7/8" x 1-1/4" x 3/32". Fits standard door frame cut-out as specified in ANSI A115.1.
Backset: 2 3/4"
Door Thickness: Standard lock configuration designed for doors 1-3/4" thick. Thick door configuration available for doors up to 3" thick (specify thickness when ordering). NOTE: “R" function not available for thick door.
Deadbolt: Stainless steel, 1" throw
Trim: Cylinder and trim ring only.
Finishes: Available in all finishes offered for 45H.

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness (standard 1-3/4" or thick door up to 3"), mortise pocket dimensions, and handing as applicable to this product.
  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 and frame by drilling required holes and routing mortise pocket to accommodate the 3-3/8" x 4-3/16" x 1" case dimensions as specified in manufacturer instructions.
  4. Install all mounting hardware and secure the device to door and frame per manufacturer torque specifications, utilizing the self-aligning trim mechanism for accurate positioning.
  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 1" deadbolt throw and make final adjustments as needed. 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 48H Series mortise deadlocks deliver professional-grade reliability with heavy-duty 0.095" cold rolled steel construction and precision-engineered components designed for demanding commercial applications. The solid one-piece stainless steel anti-friction latch and roller bearing hub mechanism provide enhanced cycle life and superior security performance. Engineered for demanding commercial applications where dependable performance and maximum security are essential.

Product Specs

Series:
48H
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
Product Category:
Mechanical Locks
Backset (Distance):
2 3/4"
Department:
Door Hardware

BEST 48H7K626 – Frequently Asked Questions

1) Will the BEST 48H mortise deadlock fit a 1-3/4 inch commercial door?
Yes. The 48H standard configuration is built for 1-3/4 inch doors, which is the usual commercial thickness. For thicker openings, a thick door configuration covers doors up to 3 inches, but you have to specify the thickness when you order. One catch: the "R" function is not offered in the thick door build.
2) Will a BEST 48H deadlock drop into my existing mortise pocket and frame prep?
The case measures 3-3/8 x 4-3/16 x 1 inches, so the pocket has to take that. On the frame side, the flat 48HS1 strike supplied as standard fits the frame cut-out specified in ANSI A115.5, and the optional lipped 48HS2 strike fits the ANSI A115.1 cut-out. Backset is 2-3/4 inches. If your existing prep is a standard ANSI mortise pocket at 2-3/4 backset, you are replacing like for like; a 2-3/8 backset door will not work.
3) Does the BEST 48H deadlock come with a core, or do I have to order one?
It ships prepped for a small format interchangeable core, less core. The 7-pin housing accepts all BEST cores, so you order the core separately and key it into your existing BEST system. Buy a 6-pin BEST core and it seats in the same housing; the housing is sized for 7-pin.
4) What does the single cylinder K function on a BEST 48H deadlock actually do on the door?
Key operates the deadbolt from one side only. There is no thumbturn and no second cylinder, so the inside face gets cylinder and trim ring only. That makes it a lock for storage rooms, gates, and openings where you do not want key-free retraction from inside. If you need key control from both faces, a double cylinder deadlock is the different animal, and the Sargent 4874 is a double cylinder mortise deadbolt on the same 2-3/4 inch backset.
5) Is a mortise deadlock like the BEST 48H the right choice, or do I need a full mortise lockset?
The 48H is a deadbolt-only body. There is no latch retracted by a knob or lever, so it does not let anyone through the door on its own, and it is normally paired with a separate latching device or a push/pull. If the opening needs one device that both latches and locks, go to a mortise lockset instead, for example the Cal-Royal NM8080 Grade 1 storeroom lockset with an interchangeable core option or the Corbin Russwin ML2003 classroom lockset, both listed for 1-3/4 inch doors.
6) What is the electronic alternative to a BEST 48H mortise deadlock for a door that needs code access?
The 48H is a mechanical, keyed lock with no electronics. For a mortise deadbolt driven by a keypad instead of a key, the Alarm Lock DL4500 Series is a Grade 1 electronic mortise deadbolt with 2,000 user codes and a privacy keypad, for doors 1-5/8 to 1-7/8 inches thick. Note that door range against the 48H, which is built for 1-3/4 inch doors with a thick door configuration available up to 3 inches - on a 2 inch or thicker door the DL4500 does not reach.
7) What is the closest equivalent to the BEST 48H mortise deadlock if I need key operation from both sides?
The BEST 48H with single cylinder function is keyed from one side only. For a mortise deadbolt keyed from both sides, the Sargent 4874 is a double cylinder mortise deadbolt with a 2-3/4 inch backset, the same backset the 48H uses, so the door and frame prep carry over. The 48H accepts BEST interchangeable cores in its 7-pin housing and ships SFIC prep less core, so if the opening is on a BEST small format keyway, the 48H stays inside that system while the 4874 is keyed as a Sargent cylinder.
8) I need latching and key control on the same door, not just a deadbolt. What mortise lock should I use instead of the BEST 48H?
The 48H is a deadlock - deadbolt only, with cylinder and trim ring, no knob or lever latch. If the opening needs a latch that retracts on a lever plus keyed control, the Accentra 8805FL is a Grade 1 storeroom mortise lock with an Arcadia lever from the 8800 Series, and the Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset for 1-3/4 inch doors with an interchangeable core option. Both give a latching storeroom function in one mortise pocket, where the 48H would need a separate latching lock beside it.
9) The door needs a deadbolt plus a lever that works from inside for egress. What covers that in one lockset?
The BEST 48H is a deadbolt-only mortise lock with a 1 inch stainless steel throw and no lever. The Sargent 7925 combines both in a single case: a Grade 1 heavy duty corridor/dormitory exit function mortise lock from the 7900 Series with rose trim and a single cylinder deadbolt. Use the 7925 where one mortise pocket has to carry both bolt and egress lever, and the 48H where the door already has its latching hardware and only needs bolt security added.
10) Can I use a Baldwin 6310 mortise lock in place of the BEST 48H?
They will not share a door prep. The Baldwin 6310 entry/storeroom mortise lock body uses a 2-1/2 inch backset and fits doors 1-3/8 inch and over, while the BEST 48H is a 2-3/4 inch backset lock. That quarter inch moves the cylinder hole and the mortise pocket, so swapping one for the other on an existing door means new prep. Match backset first: for a 2-3/4 inch backset mortise deadbolt, the Sargent 4874 is the closer dimensional peer.
11) Our doors are 1 inch ornamental iron. Will the BEST 48H fit?
No. The BEST 48H standard configuration is engineered for doors 1-3/4 inch thick, with a thick door version available up to 3 inches. For a 1 inch door, the Marks USA 21AC is an entrance double cylinder Unilock ornamental iron mortise lock with round knob rated for 1 inch doors, and the 22AC covers the same 1 inch thickness in the 22 Series. Those are the ones built for narrow ornamental iron; the 48H case is not.
12) The opening needs to be released by the access control system. Can the BEST 48H be electrified?
The 48H is a mechanical lock with no electronic operation - it is released by key. For a mortise lock the access system can drive, the Command Access ML190 is a motorized mortise lock with field selectable fail safe or fail secure operation on 24VDC in a heavy-duty 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 12/24VDC for 1-3/4 inch doors. Both replace the lock body; the 48H stays where the door is keyed-only.
13) Which mortise locks work on doors thicker than 2 inches?
The BEST 48H offers a thick door configuration for doors up to 3 inches when the thickness is specified at time of order, with the note that the R function is not available in the thick door build. Among the other mortise locks, the Hager 3810E and 3810S passage locks cover 1-3/4 to 2-1/2 inches and the Baldwin 6301 lock body is listed for 1-3/4 inch and over. Most of the heavy commercial mortise locksets - the Cal-Royal NM series, Corbin Russwin ML2003, TownSteel FME-2000 - are 1-3/4 inch only, so on a thick door the 48H is the one with a published path above 2-1/2 inches.
14) Will the 1 inch deadbolt throw on the BEST 48H reach my existing strike?
The deadbolt is stainless steel with a full 1 inch throw, which is what a hollow metal frame prepped to ANSI A115 expects. Standard supply is the flat 48HS1 strike at 3-1/2 x 1-1/8 x 3/32 inches; if your frame is prepped for a lipped strike, order the 48HS2 at 4-7/8 x 1-1/4 x 3/32 inches instead of trying to make the flat one work.
15) Do I need to specify handing when ordering a BEST 48H mortise deadlock?
No. The cylinder retainer is non-handed and the latch reverses through 180 degrees without opening the case, so one part covers left and right hand openings. The four-position hub toggle sets whether a hub is always locked, always unlocked, or locked by key, and it is what you use to make the handing change in the field.
16) What trim comes with the BEST 48H, and what else do I have to order to finish the job?
Trim is cylinder and trim ring only, so there is no rose, escutcheon, knob or lever in the box, and nothing to specify there. What you add is the BEST interchangeable core, since the lock ships SFIC prepped less core. The flat strike is supplied standard; the lipped 48HS2 is an option you call out. Faceplate is brass or bronze at 5-3/8 x 1-3/16 x 7/32 inches.
17) Is the Kaba Ilco 185 a substitute for the BEST 48H mortise deadlock?
Both are mortise deadbolts - the Kaba Ilco 185 Series carries a deadbolt function and is supplied with no handing. The BEST 48H is likewise reversible, with a non-handed cylinder retainer and a latch that rotates 180 degrees without opening the case. The difference that decides it is keying: the 48H uses a 7-pin housing that accepts all BEST cores and comes SFIC prep less core, so it drops into an existing BEST small format core system. Specify the 185 where the building is not on BEST cores.
18) Will a Sargent 130KB thumbturn work with the BEST 48H?
The Sargent 130KB is a standard duty mortise thumbturn from the Sargent 8200 Series, and the 130W is a mortise thumbturn with a round backplate from the 7800 Series. These are trim pieces for Sargent mortise cases, not a lock body. The BEST 48H is the mortise deadlock itself, a heavy duty case supplied with cylinder and trim ring, keyed by a BEST core rather than turned by a thumbturn. Order the 48H when the mortise pocket needs the lock, and a thumbturn only against the case its own manufacturer builds it for.
19) For a classroom door, should I specify the BEST 48H or a classroom function mortise lock?
The 48H is a single cylinder deadlock and does not provide a classroom function. Classroom function mortise locksets in the same heavy commercial class include the Cal-Royal NM8070, a Grade 1 classroom mortise lockset with auxiliary deadlatch for 1-3/4 inch doors, and the Corbin Russwin ML2003, a Grade 1 mortise classroom lockset in the ML2000 Series, also for 1-3/4 inch doors. Both match the 1-3/4 inch door the 48H is built around in its standard configuration, so the 48H can be added as bolt-only security above one of them if the specification calls for a separate deadbolt.
20) We are standardizing a healthcare facility on anti-ligature hardware. Does the BEST 48H fit that program?
The 48H is a conventional commercial mortise deadlock with a cylinder and trim ring, built for heavy duty commercial use, not a ligature resistant design. For behavioral health openings, the TownSteel MRX-L-01 is a Grade 1 heavy duty anti-ligature lever mortise lockset in stainless steel with passage function, the MRX-A-01 is the arch trim ligature resistant version, 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. All three are passage function, so keyed control on those openings comes from elsewhere in the specification.
21) What mortise lock should I use if the door needs no key at all?
The BEST 48H is a keyed lock and its whole function is the cylinder. Where a mortise pocket has to be filled without any keying, the Schlage PM010 is a Grade 1 non-keyed passage latch mortise lock 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. The Falcon MA101 shares the field-reversible handling behaviour of the 48H, whose latch rotates 180 degrees without opening the case.
22) Is an Emtek 3104 Hamilton mortise entrance lockset an alternative to the BEST 48H?
No - the Emtek 3104 Hamilton mortise entrance lockset is a dummy function, as are the 3102 Memphis and 3106 Manhattan, meaning they are non-operating trim with no working bolt. The BEST 48H is a working single cylinder deadlock with a 1 inch stainless steel deadbolt throw and a heavy duty 0.095 inch cold rolled steel case. Use an Emtek dummy on an inactive leaf for appearance and the 48H where the door actually has to lock.
23) We are moving the building to credential access. What mortise lock replaces a keyed BEST 48H opening?
The 48H is mechanical and keyed by a BEST core. Credentialed mortise options include the TownSteel FME-2000, a Grade 1 heavy duty classroom mortise lockset with RFID for 1-3/4 inch doors, the Schlage LEMD-GRW, a Grade 1 ENGAGE Series wireless mortise lock with a 125kHz proximity reader and 3 hour fire rating, and the Dormakaba Saffire LX-I-M002, an electronic RFID mortise lockset with BLE mobile access at BHMA Grade 2. A practical staged approach is to leave the 48H deadbolts on doors that only need bolt security and put credential hardware on the openings that need audit and revocation.
24) Restroom doors need privacy, not a key. What takes the place of a mortise deadlock there?
A single cylinder deadlock like the BEST 48H locks by key, which is wrong for a restroom. Privacy mortise options are the Hager 3840S, a Grade 1 privacy mortise lock with a 2-3/4 inch backset for doors 1-3/4 to 2 inches, and the Cal-Royal NM8440, a Grade 1 heavy duty privacy mortise lockset with deadbolt for 1-3/4 inch doors. The Hager 3840S matches the 48H on a 2-3/4 inch backset, so the cylinder line on the door prep stays where it is.
25) Is the BEST 48H heavy duty enough for a high-traffic commercial opening?
It is built as heavy duty commercial hardware: 0.095 inch cold rolled steel case, cover and armored front, zinc dichromate plated against corrosion, with four case cover screws and an interlocking armored front and cover at the latch. The armored front wraps the latch and deadbolt for lateral strength, and a roller bearing hub reduces wear over the cycle life. The cylinder ring is solid machined with a wavy washer to resist wrenching, plus a security screw that cannot be reached until the interchangeable core is pulled.
26) Is the Codelocks CL2255 a lighter-duty stand-in for a mortise deadlock?
The Codelocks CL2255 is an electronic tubular mortise latch in the CL2000 Series, rated medium duty, in a brushed steel finish. The BEST 48H is heavy duty commercial with a 0.095 inch cold rolled steel case and armored front. Different jobs: the CL2255 is a code-operated latch for lower traffic openings, the 48H is a keyed deadbolt for doors carrying commercial traffic. Where the traffic is heavy and the door needs bolt security, the CL2255 is not the swap.
How fast can I get the BEST 48H7K626 delivered?
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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 48H7K626 come with a warranty?
Absolutely. The BEST 48H7K626 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 48H7K626?
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