BEST 8T Series Classroom One-W...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$323.00
$199.31
BEST BEST 8T Series Classroom One-Way Single-Keyed Function (S) Tubular Deadbolt BEST-8T-S

BEST 8T Series Classroom One-Way Single-Keyed Tubular Deadbolt with 1" Stainless Steel Throw

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Model: 8T27SSTK626
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$323.00
$199.31
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BEST 8T Series Classroom One-Way Single-Keyed Tubular Deadbolt with 1" Stainless Steel Throw

Premium Security Tubular Deadbolt for Commercial Applications

The BEST 8T Series Classroom One-Way Single-Keyed Tubular Deadbolt delivers enhanced security for commercial office spaces, educational facilities, and residential applications requiring superior protection. Featuring a full 1" stainless steel throw deadbolt and solid construction, this tubular deadbolt fits standard door preparations with 1-3/4" door thickness compatibility. The 8T Series incorporates wrought brass or bronze trim with a 2-3/4" diameter rose design and is UL listed for use as auxiliary lock on 3-hour fire doors.

Professional Features & Benefits

  • Full 1" Stainless Steel Throw: Solid stainless steel deadbolt provides maximum security and corrosion resistance for long-term durability.
  • Attack-Resistant Design: Free-turning, wrench-resistant, tapered cylinder ring and optional hidden mounting screws enhance security against forced entry attempts.
  • Premium Construction Materials: Wrought brass or bronze trim with solid extruded brass or bronze cylinder ensures professional-grade durability and appearance.
  • Fire Door Compatibility: UL listed for use as auxiliary lock on 3-hour fire doors (GWXT) with C-UL mark for Canadian compliance.
  • Interchangeable Core System: Original BEST interchangeable core permits instant, economical rekeying and integration into existing masterkeyed systems.
  • Simple Installation: Self-aligning and reversible strike design with standard door preparation requirements for efficient installation.
  • ADA Compliance: ADA turn lever option available for accessibility requirements in commercial applications.
  • Manufacturer Warranty: 3 Year warranty coverage for added confidence and protection.

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 1-3/4" door thickness and standard bore dimensions for tubular deadbolt installation.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door surfaces for proper alignment.
  3. Prepare door by drilling required 2-1/8" bore hole and routing faceplate mortise as specified in manufacturer instructions.
  4. Install deadbolt assembly and secure mounting hardware per manufacturer torque specifications, utilizing self-aligning strike features.
  5. Adjust cylinder operation and thumbturn mechanism for proper alignment and smooth operation throughout full throw range.
  6. Test deadbolt operation to verify proper 1" throw extension and retraction, making final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities and Classrooms
  • Healthcare Institutions
  • Retail Establishments
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings
  • Industrial and Warehouse Facilities

Why Choose BEST Quality?

BEST 8T Series tubular deadbolts deliver professional-grade reliability with premium materials including wrought brass or bronze construction and solid stainless steel throw bolts. UL listed for 3-hour fire door applications with 3 Year warranty coverage. Engineered for demanding commercial applications where dependable security performance and attack resistance are essential.

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
Product Function:
Cylinder x Thumbturn
Door Hand Direction:
Non-Handed
Door Thickness Range:
1-3/4"
Product Category:
Mechanical Locks
Department:
Door Hardware

BEST 8T27SSTK626 – Frequently Asked Questions

1) Will the BEST 8T deadbolt fit a 1-3/4 inch commercial door?
Yes, 1-3/4 inch is the standard door thickness for the 8T Series tubular deadbolt, and other thicknesses are available on request. Prep is the usual tubular setup: a 2-1/8 inch bore, with the 2-3/4 inch diameter rose sized to cover that bore.
2) Which backset do I order for the BEST 8T deadbolt, 2-3/8 or 2-3/4?
Both are offered, and the backset picks the model: 2-3/8 inches is the 8T2, 2-3/4 inches is the 8T3. Measure from the door edge to the center of the existing bore and match it. 2-3/8 and 2-3/4 are the two standard backsets in North America, so an existing prep will be one or the other. The bolt is the same 1 inch throw either way, but the faceplate differs: 1 x 2-1/4 inches on the 8T2, 1-1/8 x 2-1/4 inches on the 8T3.
3) Is the bolt on the 8T2 and the 8T3 the same? I want stainless steel.
No, the bolt material differs by model. The 8T3 (2-3/4 inch backset) has a solid stainless steel bolt. The 8T2 (2-3/8 inch backset) is brass, nickel plated, with a concealed hardened steel free-turning pin against sawing. Both throw a full 1 inch and measure 5/8 x 7/8 inches. If stainless is what the spec calls for, order the 2-3/4 inch backset.
4) Can I put a BEST 8T deadbolt on a fire rated door?
The 8T Series is UL listed for use as an auxiliary lock on 3-hour fire doors (GWXT), and carries the C-UL mark for Canada. Auxiliary is the operative word: it goes above a latching lockset on the fire door, it does not replace the latch that keeps the door secured in the frame.
5) What does the classroom one-way single-keyed function mean on a BEST deadbolt?
Key outside, thumbturn inside: the bolt is thrown and retracted by key from the corridor side and by turn from the room side. In a classroom that means staff lock the door from the hall with the key and anyone inside can always retract the bolt by hand to get out. It is single cylinder, so there is no key required on the inside face.
6) Does the BEST 8T deadbolt take a BEST interchangeable core so I can key it into my existing master system?
It uses the original BEST interchangeable core, so it drops into an existing BEST masterkeyed system and rekeys by pulling the core with a control key instead of servicing the lock. That is the main reason facilities already standardized on BEST specify the 8T rather than a conventional keyed deadbolt.
7) Which strike comes with the BEST 8T deadbolt and will it work with my existing frame prep?
Four strike options are offered on the 8T: ANSI rectangular 1-1/8 x 2-3/4 inches, ANSI curved lip 1-1/8 x 2-3/4 inches, ANSI curved lip 1-1/4 x 4-7/8 inches, and ANSI high security rectangular 1-1/4 x 4-7/8 inches. If your frame already has an ANSI 1-1/8 x 2-3/4 cutout, the rectangular or curved lip small strike drops straight in. A frame prepped for the 4-7/8 inch ANSI strike takes the larger pair. The high security version is the one to pick where you want the strike anchored beyond the frame face for pry resistance.
8) My doors are 1-3/8 inch. What deadbolt should I use instead of the BEST 8T?
The 8T is set up for 1-3/4 inch doors, so for a 1-3/8 inch leaf look at a deadbolt whose range starts there. The Falcon D111 is a Grade 1 classroom deadbolt with an adjustable backset, and the Accentra D111 is Grade 1 for 1-3/8 to 1-3/4 inch doors. In Grade 2, the Dexter DB2000 single cylinder and the Hager 3215 both cover 1-3/8 to 1-3/4 inches, and the Hager carries a fire rating. All of those are cylinder by thumbturn, the same operation as the 8T.
9) What deadbolt should I use instead of the BEST 8T when the inside must be keyed as well, not thumbturn?
The BEST 8T Series is a single cylinder deadbolt, key outside and thumbturn inside. Where the inside face must also take a key, the Hager 3214 is a Grade 2 double cylinder deadbolt with a Schlage C keyway covering 1-3/8 inch to 1-3/4 inch doors, the Dexter DB1000 double cylinder is Grade 1 covering 1-3/8 inch to 1-7/8 inch, and the Design Hardware D1 Series is a Grade 1 extra heavy duty double cylinder deadbolt for 1-3/4 inch doors. Confirm your local code permits a double cylinder on the opening before specifying it.
10) What is the closest Grade 1 classroom deadbolt equivalent to the BEST 8T if I cannot get the BEST interchangeable core?
The Falcon D111 is a Grade 1 classroom deadbolt in the D100 Series with cylinder x thumbturn function and an adjustable backset, rated heavy duty. Like the BEST 8T, it is a keyed single-cylinder deadbolt with a thumbturn on the inside, so the door operates the same way from both sides. The Hager 3118 is a second Grade 1 classroom deadbolt, supplied with a Schlage C keyway and a 6-pin cylinder, which suits a building already keyed to Schlage C rather than a BEST small format core.
11) The BEST 8T is listed for 1-3/4 inch doors. What single cylinder deadbolt covers thinner doors?
The BEST 8T Series is specified for 1-3/4 inch doors. For an opening with thinner leaves, the Dexter DB1000 single cylinder deadbolt is Grade 1 and covers 1-3/8 inch to 1-7/8 inch, and the Accentra D111 is Grade 1 covering 1-3/8 inch to 1-3/4 inch with a 2-3/8 inch backset. The Hager 3215 single cylinder deadbolt with a 1 inch throw is Grade 2 and covers 1-3/8 inch to 1-3/4 inch, matching the 8T on throw length.
12) I need a keyed deadbolt on a thick door over 2 inches. What works where the BEST 8T does not?
The BEST 8T Series is specified for 1-3/4 inch doors. Where the leaf is thicker, the Corbin Russwin DL3011 is a Grade 1 cylindrical deadlock in the DL3000 Series covering 1-3/4 inch to 2-1/4 inch, and the Deltana 7312KA2 is a Grade 3 double cylinder deadbolt covering 1-3/8 inch to 2 inch. Note the DL3011 is a cylinder by blank configuration, so there is no thumbturn on the inside as there is on the 8T.
13) Which deadbolt takes an interchangeable core like the BEST 8T does?
The BEST 8T Series uses the original BEST interchangeable core, which lets a facility rekey without pulling the lock. Two peers ship prepped for a core rather than with a fixed cylinder: the Arrow E61 is a Grade 2 single cylinder deadlock with SFIC prep supplied less core, covering 1-3/8 inch to 1-3/4 inch doors, and the Deltana CL200LAIC is a Grade 2 single deadbolt with interchangeable core and a 2-3/4 inch backset. The Delaney LM Series is a Grade 1 single cylinder less core deadbolt in dull chrome US26D.
14) Is the Arrow E60 exit deadlock a substitute for the BEST 8T classroom deadbolt?
No. The Arrow E60 is a Grade 2 exit deadlock, non-keyed, with a blank plate on the outside and a thumbturn on the inside, covering 1-3/8 inch to 1-3/4 inch doors. That means no key access from the corridor side. The BEST 8T Series is keyed with a single cylinder outside and a thumbturn inside, so it locks and unlocks from either face. If the opening only needs to be secured from within, the E60 fits; if staff must key in from outside, it does not.
15) Is the Corbin Russwin DL2211 the same thing as a BEST 8T classroom deadbolt?
Both are classroom function deadlocks for 1-3/4 inch doors, but they are not interchangeable. The Corbin Russwin DL2211 is a Grade 1 cylindrical deadlock in the DL2200 Series configured cylinder by blank, so the inside face carries no thumbturn. The BEST 8T Series is cylinder by thumbturn, giving the occupant a turn on the room side. Confirm which face needs to throw the bolt before swapping one for the other.
16) What other deadbolt carries a fire rating for a labeled door?
The BEST 8T Series is UL listed for use as an auxiliary lock on 3-hour fire doors with a C-UL mark for Canada. Among peers, the Cal-Royal CRB800 is a Grade 1 heavy duty single cylinder deadbolt with a UL 3-hour fire rated latch, and the Hager 3118 Grade 1 classroom deadbolt and Hager 3115 Grade 2 cylinder x thumbturn deadbolt are both fire rated for 1-3/8 inch to 1-3/4 inch doors.
17) Can I use a mortise deadbolt in place of the BEST 8T tubular deadbolt?
Only if the door is prepped for a mortise pocket. The BEST 8T Series is a tubular deadbolt that installs in a bored hole. The Dormakaba D900 is a small case mortise deadbolt with a D cylinder, keyed different with SC keyways, and the Emtek 2050 and 2051 are European mortise deadbolts with an integrated roller latch in square and round trim, all cylinder x thumbturn like the 8T. Function matches, but the door preparation does not.
18) Do I need to order a left hand or right hand version of the BEST 8T deadbolt?
No handing to specify. The 8T tubular deadbolt is non-handed, and the strike is self-aligning and reversible, so one part number covers left and right swings. That matters when you are buying a quantity for a building with mixed swings, since the whole order is one line.
19) What finishes does the BEST 8T tubular deadbolt come in, and is there one for a healthcare corridor?
Ten finishes across both backsets: 605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 613 satin bronze oil-rubbed, 619 satin nickel, 625 bright chrome, 626 satin chrome, 626AM satin chrome antimicrobial, and 690 statuary dark bronze. For a patient corridor or clinic, 626AM is the antimicrobial version of the standard satin chrome, so it matches 626 hardware already on the floor while giving you the treated surface on the touched parts.
20) Is there an ADA compliant thumbturn option for the BEST 8T deadbolt?
An ADA turn lever is available on the 8T, mounted on a turned lever rose in place of the standard round turn. It gives an operable shape that does not need tight grasping or twisting of the wrist. The trim is wrought brass or bronze either way, on the same 2-3/4 inch diameter rose.
21) What makes the BEST 8T deadbolt harder to attack than a standard deadbolt?
Three things on the outside face. The cylinder ring is free-turning, so a wrench spins on it instead of biting; it is also tapered, which denies a pipe wrench a shoulder to grab. Hidden mounting screws are an option, so there is nothing to back out from the exterior. On the 2-3/8 inch backset model the bolt itself carries a concealed hardened steel free-turning pin that defeats a hacksaw blade.
22) Should I use a tubular deadbolt or a cylindrical deadlock on a commercial classroom door?
A tubular deadbolt like the BEST 8T installs in a 2-1/8 inch bore and is the straightforward choice when you are adding auxiliary security above an existing lockset or replacing a bolt in an existing bored prep. A cylindrical deadlock is the heavier chassis alternative: the Corbin Russwin DL3211 is a Grade 1 cylindrical deadlock for 1-3/4 inch doors, and the DL3011 covers 1-3/4 up to 2-1/4 inch doors if your leaf is thicker than standard. Go cylindrical when the spec calls out Grade 1 deadlock explicitly or the door is thicker; stay tubular when you are matching an existing bore and want the BEST core in it.
23) What is the closest alternative to a BEST 8T if I want a 1 inch throw deadbolt from another brand?
The Hager 3215 is a single cylinder commercial deadbolt with a 1 inch throw, cylinder by thumbturn, fitting 1-3/8 to 1-3/4 inch doors and fire rated. For a classroom function specifically, the Hager 3118 is a Grade 1 classroom deadbolt on a Schlage C keyway with a 6-pin cylinder. Both are conventional key-in-cylinder locks though, so neither will accept a BEST interchangeable core or fold into an existing BEST masterkey system. If keying continuity across the building matters more than anything else, stay with the 8T.
24) Will a 1 inch throw deadbolt reach my strike on a standard commercial frame?
A full 1 inch throw is what commercial specs generally call for, and it is what the 8T delivers on both the 2-3/8 and 2-3/4 inch backset models. The bolt face is 5/8 x 7/8 inches, so the strike cutout has to accept that section. Pair it with one of the ANSI strikes offered, either the 1-1/8 x 2-3/4 inch or the 1-1/4 x 4-7/8 inch, and match whichever your frame is already prepped for.
25) Will the BEST 8T deadbolt cover the marks left by the old lock I am replacing?
The rose is 2-3/4 inches in diameter and sized to cover a 2-1/8 inch bore, so it hides a standard tubular prep and a little beyond it. Anything wider than 2-3/4 inches on the door face, such as a scar from an oversize escutcheon, will still show. Trim is wrought brass or bronze with a machined brass or bronze cylinder ring, in ten finishes, so matching the rest of the doors in the building is usually possible without changing the other hardware.
26) Is there a lighter duty single cylinder deadbolt than the BEST 8T for an interior office door that does not need Grade 1?
For a lower traffic interior opening, the Falcon D211 is a Grade 2 classroom function deadbolt with single cylinder operation in the D200 Series, rated medium duty. The Arrow DBX61 is another Grade 2 single cylinder deadbolt with cylinder x thumbturn function, and the Cal-Royal CB160 is Grade 2 with a tamper-resistant cylinder guard. All three operate the same way as the 8T from the occupant side, with a thumbturn inside and a key outside.
27) What deadbolt gives keyless code entry where the BEST 8T needs a key?
The BEST 8T Series is a keyed mechanical tubular deadbolt. If the opening should open on a code or credential instead, the Codelocks CL200 is a surface deadbolt with key override rated light duty, the Codelocks CL2200 is an electronic surface deadbolt in brushed steel rated medium duty, and the Delaney KP400 is a Grade 2 electronic deadbolt with a programmable remote. These mount and prep differently than a tubular bolt, so verify the door prep before switching.
28) Which alternative deadbolt has an ADA friendly thumbturn?
The BEST 8T Series offers an ADA turn lever option for accessibility requirements. The Cal-Royal LSD is a Grade 3 single cylinder deadbolt built with an ADA ergonomic thumbturn as standard, covering 1-3/8 inch to 1-3/4 inch doors with cylinder x thumbturn function. It is a lighter grade than the 8T, so match it to traffic on the opening.
29) The BEST 8T comes in 2-3/8 and 2-3/4 inch backsets. Which alternatives handle an unknown backset in the field?
The BEST 8T Series is ordered by backset, either 2-3/8 inch or 2-3/4 inch. If the existing bore has not been measured, the Falcon D111 Grade 1 classroom deadbolt has an adjustable backset, and the Cal-Royal ED500 Grade 3 single cylinder deadbolt has an adjustable backset for 1-3/8 inch to 1-3/4 inch doors. The Brinks Raleigh E2401 single cylinder deadbolt uses a 4-way adjustable backset. For a fixed 2-3/4 inch, the Deltana CL200LA is a Grade 2 single deadbolt at that backset.
30) Is a Baldwin or Emtek decorative deadbolt an equivalent to the BEST 8T for a commercial opening?
They serve a different opening. The BEST 8T Series is a commercial tubular deadbolt with wrought brass or bronze trim on a 2-3/4 inch rose. The Emtek #11 Tuscany is a lost wax cast bronze deadbolt, cylinder x thumbturn, and the Baldwin Estates 8011 is a contemporary 1-5/8 inch double cylinder deadbolt. Those are decorative residential trims, and the Baldwin 8011 is double cylinder, so it has no thumbturn on the inside the way the 8T does.
31) What locks the same opening as the BEST 8T but electrically, for access control release?
The BEST 8T Series is a mechanical key and thumbturn deadbolt with no electrical function. Where the bolt must release from an access control system, the DynaLock 1300 Series is a heavy duty mortise electric deadbolt, and the Dormakaba Saffire LX-D is an RFID electronic deadbolt with BLE and electronic lock override. Both need power to the opening, which a tubular mechanical bolt does not.
32) I need a deadbolt with no exterior cylinder at all on a storage door. What replaces the BEST 8T there?
The BEST 8T Series is keyed with a cylinder on the outside. For a door that should never be keyed from outside, the Callan Model 205S is a Grade 3 one-sided half-bore deadbolt, and the Arrow E60 is a Grade 2 non-keyed exit deadlock with a blank plate outside and thumbturn inside for 1-3/8 inch to 1-3/4 inch doors. Neither gives you master key access to the room.
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Can I return it if it doesn’t work for me?
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Does the BEST 8T27SSTK626 come with a warranty?
Absolutely. The BEST 8T27SSTK626 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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