BEST 8T Series Single Cylinder...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$323.00
$183.57
BEST 8T Series Single Cylinder Keyed Entry Tubular Deadbolt with 1" Stainless Steel Throw

BEST 8T Series Single Cylinder Keyed Entry Tubular Deadbolt with 1" Stainless Steel Throw

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Model: 8T37KSTK626
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$323.00
$183.57
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BEST 8T Series Single Cylinder Keyed Entry Tubular Deadbolt with 1" Stainless Steel Throw

Premium Security Deadbolt for Commercial and Residential Applications

The BEST 8T Series tubular deadbolt delivers enhanced security with a full 1" stainless steel throw bolt and attack-resistant design features. Built with identical tubular assemblies that fit standard door preparations, this single cylinder deadbolt is often paired with cylindrical locks in commercial office spaces and residential applications where greater security is needed. The solid construction includes tapered cylinder rings and optional hidden mounting screws for brute force resistance, while maintaining compatibility with existing BEST masterkeyed systems through the original interchangeable core design.

Professional Features & Benefits

  • Full 1" Stainless Steel Throw: Solid stainless steel deadbolt provides enhanced durability and extra protection against forced entry attempts.
  • Attack-Resistant Design: Free-turning, wrench-resistant, tapered cylinder ring and optional hidden mounting screws enhance security against tampering.
  • Standard Door Preparation: Fits standard door preps with 2 3/8" backset for 8T2 and 2 3/4" backset for 8T3 models for easy installation.
  • Premium Construction: Solid extruded brass or bronze cylinder with wrought brass or bronze trim for long-lasting performance.
  • Interchangeable Core System: Compatible with existing BEST masterkeyed systems and permits instant, economical rekeying with the original interchangeable core.
  • Fire Door Rated: UL listed for use as auxiliary lock on 3-hour fire doors (GWXT) with C-UL mark for Canadian compliance.
  • Simple Installation: Self-aligning and reversible strike design simplifies installation without compromising security performance.
  • 3 Year Warranty: Manufacturer warranty provides added confidence and protection for commercial applications.

Technical Specifications

  • Faceplate: Brass or bronze; 8T2 - 1” x 2 1/4”; 8T3 - 1 1/8” x 2 1/4”
  • Strikes: ANSI rectangular 1 1/8” x 2 3/4”; ANSI curved lip 1 1/4” x 4 7/8”;
    ANSI curved lip 1 1/8” x 2 3/4”; ANSI high security rectangular 1 1/4” x 4 7/8”
  • Trim: Wrought brass or bronze; rose or turned lever rose; 2 3/4” diameter
    to cover 2 1/8” bore; machined brass or bronze cylinder ring
  • Backset: 2 3/8” for 8T2; 2 3/4” for 8T3
  • Deadbolt: 8T2 - 1” throw, 5/8” x 7/8”, brass nickel plated, concealed hardened
    steel free-turning pin; 8T3 – 1” throw, 5/8” x 7/8”, solid stainless steel
  • Door thickness: 1 3/4” doors standard, other thicknesses available 

DOWNLOAD & RESOURCES

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness (1-3/4" standard), backset dimensions (2 3/8" for 8T2, 2 3/4" for 8T3), and bore requirements.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door surfaces for proper alignment.
  3. Prepare door by drilling required holes per manufacturer specifications, ensuring clean cuts for proper fit and operation.
  4. Install the tubular deadbolt assembly and secure all mounting hardware per manufacturer torque specifications.
  5. Install the self-aligning and reversible strike on the door frame, adjusting for proper deadbolt engagement and smooth operation.
  6. Test deadbolt operation from both sides to verify proper function, smooth throw action, and complete engagement. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

  • Commercial Office Buildings
  • Residential Properties
  • Healthcare Facilities (including radioactive doors with lead line options)
  • Educational Institutions
  • Government Buildings
  • Multi-Tenant Properties
  • High-Security Storage Areas

Why Choose BEST Quality?

BEST 8T Series deadbolts incorporate top quality design, engineering, and premium materials including solid stainless steel construction and brass or bronze components. UL listed for 3-hour fire door applications with 3-year manufacturer warranty, these deadbolts are engineered for demanding commercial applications where dependable security performance is essential. The interchangeable core system and compatibility with existing BEST masterkeyed systems provide long-term flexibility and cost-effective security management.

Product Specs

Series:
T Series
Warranty:
3 Year
Keyed:
Yes
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Deadbolts
Subcategory:
Bored Locksets
Keyed Function:
Single Cylinder
Commercial/Residential:
Commercial
Lock Type:
Tubular
Lock Function:
Deadbolt
Product Attribute:
Deadbolts
Tags:
best 8t deadbolt
Product Function:
Cylinder x Thumbturn
Door Hand Direction:
Non-Handed
Door Thickness Range:
1-3/4"
Product Category:
Mechanical Locks
Department:
Door Hardware

BEST 8T37KSTK626 – Frequently Asked Questions

1) Will the BEST 8T deadbolt fit my existing door prep, or do I need to redrill?
The 8T tubular deadbolt drops into a standard deadbolt prep: 2-1/8 inch cross bore covered by the 2-3/4 inch diameter rose, and a 1 inch x 2-1/4 inch faceplate on the 8T2 or 1-1/8 inch x 2-1/4 inch on the 8T3. Order it to match the backset already in the door, 2-3/8 inches for the 8T2 or 2-3/4 inches for the 8T3, and both are stocked in every finish. It's non-handed, so the same unit works on a left or right hand door. Door thickness is 1-3/4 inches.
2) Which backset do I order for a BEST 8T deadbolt, 2-3/8 or 2-3/4?
Measure from the door edge to the center of the bore. 2-3/8 inches is the 8T2 and 2-3/4 inches is the 8T3, and both backsets are offered in all ten finishes: 605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 613 oil-rubbed bronze, 619 satin nickel, 625 bright chrome, 626 satin chrome, 626AM satin chrome antimicrobial, and 690 statuary dark bronze. The two backsets differ in more than the dimension: the 8T2 bolt is nickel plated brass with a concealed hardened steel free-turning pin, while the 8T3 bolt is solid stainless steel. Both throw a full 1 inch.
3) Will a BEST 8T deadbolt work on our existing BEST interchangeable core masterkey system?
Yes. The 8T takes the original BEST interchangeable core, so it goes onto an existing BEST masterkeyed system and rekeys by pulling the core rather than servicing the lock. That is the reason to spec this over a conventional-cylinder deadbolt if your building is already on BEST cores, and it's why the 8T is commonly hung above a BEST cylindrical lock on the same office door.
4) Can I put a deadbolt on a 3-hour fire rated door?
The BEST 8T is UL listed as an auxiliary lock on 3-hour fire doors under the GWXT category, and carries the C-UL mark for Canadian jobs. Auxiliary is the operative word: it is a deadbolt only, so the door still needs its rated latching lock or exit device to hold the leaf closed. The 8T adds security on top of that, it does not replace it.
5) Will a 1 inch throw deadbolt engage my existing ANSI strike?
The full 1 inch throw on the 8T is sized for a standard ANSI frame prep, and the deadbolt face measures 5/8 x 7/8 inches. Strike options cover ANSI rectangular 1-1/8 x 2-3/4, ANSI curved lip 1-1/8 x 2-3/4, ANSI curved lip 1-1/4 x 4-7/8, and an ANSI high security rectangular 1-1/4 x 4-7/8. If the frame is already cut for a 1-1/8 x 2-3/4 ANSI strike you can reuse the cutout; the 4-7/8 lip strikes need the taller frame prep. The strike is self-aligning and reversible, so the same one serves either hand.
6) What deadbolt can I use on a 1-3/8 inch door instead of the BEST 8T?
The 8T is built for 1-3/4 inch doors. For a thinner leaf, look at the Dexter DB2000 single cylinder, rated 1-3/8 to 1-3/4 inches, the Accentra D111 Grade 1 with a 2-3/8 inch backset, also 1-3/8 to 1-3/4, or the Hager 3215 single cylinder with a 1 inch throw covering the same range. All three are cylinder x thumbturn like the 8T. None of them take a BEST interchangeable core, so if the building is masterkeyed on BEST you lose that.
7) What is the closest Grade 1 alternative to the BEST 8T deadbolt if the door already has a Schlage C keyway system?
The Hager 3118 is a Grade 1 classroom deadbolt built around a Schlage C keyway with a 6-pin cylinder, and it is fire rated. It covers doors from 1-3/8 inch to 1-3/4 inch. The BEST 8T is a single cylinder tubular deadbolt in a cylinder x thumbturn function for 1-3/4 inch doors, and its cylinder is the BEST interchangeable core, so it keys into an existing BEST masterkey system rather than a Schlage C system. Choose by which keyway the building is already standardized on.
8) Which deadbolt takes a small format interchangeable core like the BEST 8T does?
Two options carry interchangeable core prep. The Arrow E61 26D IC is a Grade 2 single cylinder deadlock supplied with SFIC prep less core, for doors 1-3/8 inch to 1-3/4 inch. The Deltana CL200LAIC is a Grade 2 single cylinder deadbolt, interchangeable core, non-cylinder, on a 2-3/4 inch backset. The BEST 8T uses the original BEST interchangeable core and comes in 2-3/8 inch and 2-3/4 inch backsets, so it is the one that drops straight into an existing BEST masterkey system without a keyway change.
9) I need a deadbolt with no key on the inside and no key on the outside either - what replaces a keyed tubular deadbolt on an exit door?
The Arrow E60 is a Grade 2 exit deadlock, non-keyed, with a blank plate on the outside and a thumbturn on the inside, for doors 1-3/8 inch to 1-3/4 inch. That is the part for an exit-only opening where nobody should be able to enter with a key. The BEST 8T is keyed, single cylinder, cylinder x thumbturn, so it is the choice when the outside face must be operable by key.
10) What do I use instead of the BEST 8T when the door needs a key on both sides?
Double cylinder deadbolts take a key on the inside face as well as the outside. The Design Hardware D1 Series is a Grade 1 double cylinder deadbolt, extra heavy duty, for 1-3/4 inch doors. The Dexter DB1000-DCT is a Grade 1 double cylinder deadbolt covering 1-3/8 inch to 1-7/8 inch. The Hager 3214 is a Grade 2 double cylinder deadbolt on a Schlage C keyway, fire rated, for 1-3/8 inch to 1-3/4 inch doors. The BEST 8T is a single cylinder unit - key outside, thumbturn inside. Confirm your local egress code before specifying double cylinder on a required exit door.
11) Is there a single cylinder deadbolt that fits doors thinner than 1-3/4 inch?
Yes. The Dexter DB2000-SCT is a Grade 2 single cylinder deadbolt covering 1-3/8 inch to 1-3/4 inch, and the Dexter DB1000-SCT is the Grade 1 version covering 1-3/8 inch to 1-7/8 inch. The Accentra D111 is a Grade 1 single cylinder deadbolt on a 2-3/8 inch backset for 1-3/8 inch to 1-3/4 inch doors. The BEST 8T is specified for 1-3/4 inch doors as standard, with other thicknesses available to order, so on a mixed-thickness building the Dexter units cover the range off the shelf.
12) Does the Corbin Russwin DL3011 substitute for a BEST 8T tubular deadbolt?
Not directly. The Corbin Russwin DL3011 is a Grade 1 cylindrical deadlock in a cylinder x blank configuration for 1-3/4 inch to 2-1/4 inch doors - the inside face is blank, with no thumbturn. The BEST 8T is a cylinder x thumbturn tubular deadbolt for 1-3/4 inch doors, so an occupant can throw and retract the bolt from inside without a key. If the opening needs inside thumbturn operation, the DL3011 is the wrong function even though both are keyed bored deadbolts.
13) Which single cylinder deadbolts besides the BEST 8T carry a fire rating?
The Hager 3215 is a Grade 2 single cylinder commercial deadbolt with a 1 inch throw, fire rated, covering 1-3/8 inch to 1-3/4 inch doors. The Hager 3115 is a Grade 2 cylinder x thumbturn deadbolt on a Schlage C keyway, also fire rated, same thickness range. The Cal-Royal CRB800 is a Grade 1 heavy duty single cylinder deadbolt with a UL 3-hour fire rated latch. The BEST 8T is UL listed as an auxiliary lock on 3-hour fire doors with the C-UL mark for Canadian compliance, which matters if the job crosses the border.
14) What deadbolt should I use when the backset in the existing door prep is unknown or varies across the building?
Adjustable backset units cover both common preps from one part. The Brinks Raleigh E2401 is a transitional round single cylinder deadbolt with a 4-way adjustable backset, and the Brinks Mendocino E2402 is the contemporary square version with the same 4-way adjustable backset. The Falcon D111 is a Grade 1 heavy duty deadbolt with adjustable backset. The BEST 8T is ordered to a fixed backset - 2-3/8 inch for the 8T2 and 2-3/4 inch for the 8T3 - so measure from the door edge to the center of the bore before ordering it.
15) If I want the deadbolt and the latch to work as one lock rather than two separate bores, what is the alternative?
The Falcon H2101 is a Grade 2 entrance interconnected lock with a single cylinder deadbolt, so the lever retracts the latch and the deadbolt together from inside. The BEST 8T is a standalone tubular deadbolt commonly installed alongside a separate cylindrical lock, which means two bores and two independent operations at the opening.
16) Single cylinder or double cylinder deadbolt on a commercial exit door?
The 8T in K function is single cylinder: key outside, thumbturn inside, so anyone inside can get out without a key. That is what most egress codes require on an occupied space, and it is the version to spec unless there is glass within reach of the turn. If the opening genuinely calls for a key both sides, that is a different part, for example the Design Hardware D1 Series Grade 1 double cylinder deadbolt for 1-3/4 inch doors or the Dexter DB1000 Grade 1 double cylinder for 1-3/8 to 1-7/8 inch doors.
17) What makes the BEST 8T harder to attack than a standard deadbolt?
Three things on the 8T: a free-turning, wrench-resistant tapered cylinder ring so it can't be gripped and twisted off, optional hidden mounting screws so the bolt can't be pulled by attacking the exposed screws, and the bolt itself, solid stainless steel with a 1 inch throw on the 8T3, or nickel plated brass with a concealed hardened steel free-turning pin on the 8T2 to defeat sawing. Cylinder body is solid extruded brass or bronze with wrought brass or bronze trim.
18) Should I use a tubular deadbolt or a mortise deadlock on a commercial door?
A tubular deadbolt like the 8T goes into a bored prep, a 2-1/8 inch cross bore plus an edge bore, which is the fastest install and the easiest retrofit on a door that already has one. A mortise deadlock needs a pocket cut into the door edge instead; the Dormakaba D900 small case mortise deadbolt and the Corbin Russwin DL3011 Grade 1 cylindrical deadlock for 1-3/4 to 2-1/4 inch doors are examples of that route. Go tubular when the door is already bored or you are drilling fresh on a standard prep, and mortise when the door is prepped for a case or you need it to suite with mortise lock hardware.
19) Is the BEST 8T suitable for apartment and multi-tenant entry doors?
Yes, and the core system is the reason. On multi-tenant work the 8T's interchangeable core lets you swap a tenant's key without pulling the lock off the door, and the whole building stays on one BEST masterkey. It's a commercial-duty deadbolt, standard on 1-3/4 inch doors, non-handed so one part number covers every unit regardless of swing.
20) Does the BEST 8T deadbolt come with a core and keys?
The 8T is a keyed single cylinder deadbolt built around the BEST interchangeable core, so specify the core and keyway separately to match the system you're keying it into. On a building already on BEST cores you're usually pinning an existing core into it. Also settle the strike when you order, since four ANSI strikes are offered, and whether you want the hidden mounting screws, which are an option rather than standard.
21) What is a lighter-duty single cylinder deadbolt for interior or low-traffic doors?
The Cal-Royal ED500 is a Grade 3 single cylinder deadbolt with adjustable backset, and the Cal-Royal LSD is a Grade 3 single cylinder deadbolt with an ADA ergonomic thumbturn - both cover 1-3/8 inch to 1-3/4 inch doors. The Callan Model 200S is a Grade 3 single cylinder square trim deadbolt. The BEST 8T is a commercial tubular deadbolt with a 1 inch stainless steel throw and BEST interchangeable core keying, so it is the one to hold onto where the opening is on a masterkey system.
22) Is the Arrow 460 an alternative to a BEST 8T deadbolt?
No - the Arrow 460 is a mortise lock strike for latchbolt and deadbolt functions with a straight lip, for 1-3/4 inch doors. It is frame hardware, not a lock. The BEST 8T is the deadbolt itself, a keyed tubular unit, and it ships with a self-aligning reversible strike, so the 460 is not needed to complete it.
23) What is the alternative if I want keypad or credential access instead of a keyed deadbolt?
Several electronic deadbolts cover that. The Codelocks CL2200 is a medium duty electronic surface deadbolt in a brushed steel finish, and the CL200 is a light duty surface deadbolt with key override. The Dormakaba Saffire LX-D is an RFID electronic deadbolt with BLE and electronic lock override. The Delaney KP400 is a Grade 2 electronic deadbolt with a programmable remote. Note that the surface-mounted Codelocks units mount on the face of the door rather than into a bored prep; the BEST 8T is a tubular deadbolt set into a standard bore with 2-3/8 inch or 2-3/4 inch backset.
24) What is the equivalent to a BEST 8T for a mortise-prepped door rather than a bored door?
For a mortise pocket, the Dormakaba D900 small case mortise deadbolt is a cylinder x thumbturn unit with a D cylinder, keyed different with SC keyways. The Emtek 2050 and 2051 are European mortise deadbolts with an integrated roller latch, square and round trim respectively, both cylinder x thumbturn. The BEST 8T is a tubular deadbolt that goes into a bored prep with a 2-1/8 inch bore, so it is not a swap for a door already mortised.
25) Is there a deadbolt that installs when only one face of the door is accessible?
The Callan Model 205S is a Grade 3 one-sided half-bore deadbolt, which takes a half bore rather than a through bore. The BEST 8T is a two-sided assembly - keyed cylinder outside, thumbturn inside - requiring a full standard bore through the door.
26) What deadbolt has a hardened cylinder guard against wrenching, like the BEST 8T's tapered ring?
The Cal-Royal CB160 is a Grade 2 single cylinder deadbolt with a tamper-resistant cylinder guard. The BEST 8T uses a free-turning, wrench-resistant tapered cylinder ring plus optional hidden mounting screws, with a 1 inch stainless steel throw carrying a concealed hardened steel free-turning pin against sawing. Both target the same attack, by different means.
27) What is the option when the opening needs more than one locking point rather than a single bolt?
The Detex DX Series is a hinge side locking deadbolt with multi-point security, engaging the hinge side of the opening in addition to the lock edge. The BEST 8T throws a single 1 inch stainless steel bolt, 5/8 inch by 7/8 inch, into an ANSI strike on the lock edge.
28) Which deadbolt should I specify when the door is controlled by an access control system rather than a key?
The DynaLock 1300 Series is a heavy duty mortise electric deadbolt, released by the access control system rather than by cylinder. The BEST 8T is a mechanical keyed tubular deadbolt with a thumbturn inside, so it is the right part where the opening is secured by key and masterkey rather than by an electrified circuit.
29) Is there a BEST deadbolt finish for a healthcare or high-touch opening?
626AM satin chrome antimicrobial is one of the ten 8T finishes and is available on both the 2-3/8 and 2-3/4 inch backsets. It matches 626 satin chrome visually, so you can run it on patient room and corridor doors and keep the rest of the building on standard 626 without a mismatch. The full range also covers 605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 613 oil-rubbed bronze, 619 satin nickel, 625 bright chrome, and 690 statuary dark bronze.
30) Is the Baldwin Reserve 8BR0618001 a substitute for a tubular deadbolt?
No. The Baldwin Reserve 8BR0618001 is a deadbolt spacer for a double cylinder application - a fitting piece, not a lock. The BEST 8T is the complete single cylinder deadbolt assembly with cylinder, thumbturn, bolt and strike.
31) What deadbolt goes on a residential or decorative opening where the BEST 8T's commercial look is wrong?
The Emtek #11 Tuscany is a lost wax cast bronze deadbolt in a cylinder x thumbturn function, and the Baldwin Estate 8011 is a contemporary 1-5/8 inch double cylinder deadbolt. The Bravura 310RC Elite is a Grade 2 contemporary round deadbolt and the 310SC Elite is the square trim version, both cylinder x thumbturn. The BEST 8T is a commercial unit with rose or turned lever rose trim in wrought brass or bronze, 2-3/4 inch diameter, in finishes from 605 bright brass through 690 statuary dark bronze.
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Can I return it if it doesn’t work for me?
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Does the BEST 8T37KSTK626 come with a warranty?
Absolutely. The BEST 8T37KSTK626 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 8T37KSTK626?
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