BEST 8T Series Closet Function...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$268.00
$159.38
BEST 8T Series Closet Function Non-Keyed Tubular Deadbolt with Thumbturn

BEST 8T Series Closet Function Non-Keyed Tubular Deadbolt with Thumbturn

(No reviews yet) Write a Review

Model: 8T30KLSTK626
Selected Finish is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$268.00
$159.38
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

BEST 8T Series Closet Function Non-Keyed Tubular Deadbolt with Thumbturn

Premium Security Tubular Deadbolt for Commercial Applications

The BEST 8T Series Tubular Deadbolt delivers premium materials, security, and performance for commercial office spaces, residential applications, and areas requiring enhanced security protection. This non-keyed closet function deadbolt features a full 1" stainless steel throw bolt with 5/8" x 7/8" dimensions and fits standard door preparations with 1-3/4" door thickness. Built with solid extruded brass or bronze cylinder construction and wrought brass or bronze trim, this UL listed deadbolt is approved for use as auxiliary lock on 3-hour fire doors.

Professional Features & Benefits

  • Full 1" Stainless Steel Deadbolt: Solid stainless steel construction with 5/8" x 7/8" dimensions provides enhanced durability and extra protection against forced entry.
  • Attack-Resistant Design: Free-turning, wrench-resistant, tapered cylinder ring and optional hidden mounting screws deliver superior resistance to brute force attacks.
  • Premium Construction Materials: Solid extruded brass or bronze cylinder with wrought brass or bronze trim ensures long-lasting performance and corrosion resistance.
  • Fire Door Compatibility: UL listed for use as auxiliary lock type on 3-hour fire doors with GWXT certification and C-UL mark for Canadian compliance.
  • Flexible Door Preparation: Standard 2-3/8" backset for 8T2 model and 2-3/4" backset for 8T3 model with 1-3/4" door thickness standard.
  • Simple Installation: Self-aligning and reversible strike design enables straightforward installation without compromising security performance.
  • Master Key Integration: Compatible with existing BEST masterkeyed systems using the original interchangeable core for instant, economical rekeying.
  • 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 appropriate backset dimensions for 8T2 or 8T3 model selection.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door surfaces for proper deadbolt alignment.
  3. Prepare door by drilling required holes and routing as specified in manufacturer instructions for tubular deadbolt installation.
  4. Install all mounting hardware and secure the deadbolt assembly to door per manufacturer torque specifications.
  5. Adjust thumbturn operation and deadbolt alignment for proper extension and retraction throughout the full 1" throw range.
  6. Test deadbolt operation to verify proper function 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
  • Multi-Tenant Residential Properties
  • Storage and Utility Rooms
  • Fire-Rated Door Applications

Why Choose BEST Quality?

BEST 8T Series tubular deadbolts incorporate top quality design, engineering, and premium materials including solid stainless steel construction and brass or bronze components for enhanced durability. UL listed for 3-hour fire door applications with 3 Year warranty coverage, these deadbolts deliver the professional-grade reliability and security performance expected from BEST. Engineered for demanding commercial applications where dependable protection and long-term durability are essential.

Product Specs

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

BEST 8T30KLSTK626 – Frequently Asked Questions

1) Will the BEST 8T Series tubular deadbolt fit a standard 1-3/4 inch commercial door?
Yes. The 8T Series tubular deadbolt is built for 1-3/4 inch doors as standard, and other thicknesses are available. Order it to match the existing bore: the trim rose is 2-3/4 inches in diameter to cover a 2-1/8 inch bore, which is the standard bored prep on commercial doors. If your door is already prepped for a tubular deadbolt at 2-1/8 inch bore with either a 2-3/8 or 2-3/4 inch backset, it drops in.
2) Which BEST 8T backset do I order, 2-3/8 or 2-3/4?
Measure from the door edge to the center of the existing bolt hole. The 8T2 uses a 2-3/8 inch backset and the 8T3 uses 2-3/4 inch, and both backsets are offered in every finish the deadbolt comes in. The faceplate differs with it: 1 x 2-1/4 inches on the 8T2, 1-1/8 x 2-1/4 inches on the 8T3. If you are drilling a new door, 2-3/8 and 2-3/4 are the two usual backsets, so pick whichever matches the other hardware on the opening.
3) Is the BEST 8T closet function deadbolt keyed, and how does it operate?
It is not keyed. The closet function (KL) 8T is a blank plate on the outside and a thumbturn on the inside, so the bolt throws and retracts only from the inside of the door. There is no cylinder and no interchangeable core in this version. Use it on storage rooms, utility closets, back-of-house doors, and privacy applications where nobody needs to secure or release the bolt from the corridor side. If someone has to operate it from outside, this is the wrong function.
4) Can a non-keyed deadbolt go on a 3-hour fire door?
The 8T Series is UL listed for use as an auxiliary lock type on 3-hour fire doors, carrying GWXT certification and the C-UL mark for Canada. Auxiliary is the operative word: it is a secondary bolt, so the door still needs its own fire-rated latching lockset or exit device. A deadbolt alone does not latch a fire door.
5) Will the 8T deadbolt latch into the strike already in my frame?
The bolt throws a full 1 inch and measures 5/8 by 7/8 inches, which is the standard bolt face for a tubular deadbolt, so an existing deadbolt strike pocket usually takes it. Four strikes are covered: 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, and ANSI high security rectangular 1-1/4 x 4-7/8. Match the strike to the frame prep you already have, and check the frame is mortised deep enough to swallow a full 1 inch of bolt.
6) I need the deadbolt on my closet doors keyed into our building master key system. Can I use the 8T?
Not this version. The closet function 8T has a blank plate outside with no cylinder, so there is nothing to key. The 8T Series itself works with existing BEST masterkeyed systems using the original interchangeable core, so you can rekey by pulling the core with a control key. To get that, order a keyed 8T function rather than the KL closet function.
7) My door is 1-1/4 inches thick. Will the BEST 8T deadbolt work?
Not as standard. The 8T is specified for 1-3/4 inch doors, though other thicknesses are available on request. For thinner or non-standard leaves, the Lockey 2500 Series covers 1-1/8 to 2 inches with an adjustable backset, and the Lockey 2950 narrow stile hookbolt with a 1-1/8 inch backset covers the same 1-1/8 to 2 inch range on narrow stile doors. Confirm the door thickness before ordering an 8T for anything outside 1-3/4 inches.
8) What can I use instead of a BEST 8T thumbturn deadbolt on a door thinner or thicker than 1-3/4 inches?
The BEST 8T Series non-keyed tubular deadbolt is built around 1-3/4 inch doors as the standard preparation, so an opening outside that thickness needs a different approach. The Lockey 2500 Series mechanical keypad hook bolt lock with adjustable backset covers a door thickness range of 1-1/8 inch to 2 inch, which takes in thin storefront-style leaves and thicker slabs alike. The trade is in how the door is operated: the 8T is a non-keyed deadbolt thrown by a thumbturn with a blank plate on the opposite face, while the Lockey 2500 is a pushbutton code-entry lock throwing a hook bolt. Confirm which side needs to release the bolt before substituting, because the 8T offers no outside operation at all.
9) Is Kwikset Halifax or Perth dummy trim a substitute for a BEST 8T closet deadbolt?
No, and the two are not doing the same job. The Kwikset KWI-968HFLRDT Halifax lever with round rose and the KWI-968PHL Perth lever are interior dummy handleset trim, a dummy function, meaning the lever is fixed decoration with no bolt behind it. The BEST 8T Series is a tubular deadbolt with a thumbturn that actually throws a bolt into the frame. If the requirement is to secure a closet or storage door, dummy trim will not hold it shut; if the requirement is a pull on an inactive leaf that never latches, the deadbolt is more preparation than the opening needs.
10) The 8T deadbolt has no outside operation. What do I use when staff need to get in from the corridor side without carrying a key?
The BEST 8T Series is a blank plate by thumbturn arrangement, so it locks and unlocks only from the inside face. For an opening where people must enter from the outside, the Codelocks CL250 tubular latch with key override in the CL200 Series adds code entry with a key override behind it. Where entry is needed from both faces, the Codelocks CL510 and CL515 tubular latchbolt back-to-back in the CL500 Series and the CL610 and CL615 back-to-back in the CL600 Series are both heavy duty and put a code entry on each side of the door. Note the bolt type changes with the swap: the 8T throws a deadbolt, while the Codelocks units are latchbolt devices that operate as the door is used.
11) My aluminum door stile is too narrow for a 2-3/8 inch backset deadbolt. What locks that opening?
The BEST 8T Series is offered at 2-3/8 inch and 2-3/4 inch backsets, both of which need a stile deep enough to accept a standard bored preparation. For a narrow stile the Lockey 2950 narrow stile hookbolt mechanical pushbutton lock is built to a 1-1/8 inch backset and covers a 1-1/8 inch to 2 inch door thickness range. The differences to plan for are the bolt and the operation: the 2950 throws a hook bolt and is entered by pushbutton code, where the 8T is a thumbturn-operated deadbolt with no outside operating trim.
12) Do I have to specify handing on the BEST 8T tubular deadbolt?
No handing to call out. The 8T is non-handed, and the strike is self-aligning and reversible, so the same part works on a left or right hand door swinging either way. That makes it straightforward to stock one spec across a building instead of splitting the order by swing.
13) What finishes does the BEST 8T deadbolt come in, and is there one for a healthcare corridor?
Ten finishes, all available in 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 patient rooms, clinics, and food service, 626AM is the antimicrobial version of the standard 626 satin chrome, so it matches other 626 hardware on the same run of doors.
14) How well does this deadbolt hold up to someone attacking it from the outside?
The exposed side is the hard part on any deadbolt, and the 8T addresses it three ways: a free-turning, wrench-resistant tapered cylinder ring that gives a pipe wrench nothing to bite, optional hidden mounting screws so the trim cannot be unscrewed off the door, and a full 1 inch of bolt into the frame. The 8T3 bolt is solid stainless steel; the 8T2 is nickel plated brass with a concealed hardened steel free-turning pin to defeat sawing. Bodies are solid extruded brass or bronze with wrought brass or bronze trim.
15) What is the difference between a tubular deadbolt like the BEST 8T and a keypad or hookbolt lock for a storage room?
The 8T is a mechanical bolt with a thumbturn only, no code and no key, for doors where control from the corridor side is not needed. If people have to get in from outside without carrying a key, a pushbutton lock is the other direction: the Lockey 2500 Series is a mechanical keypad hook bolt lock with an adjustable backset for doors 1-1/8 to 2 inches thick, and the Codelocks CL250 is a tubular latch with key override. Those trade the 8T's simplicity for coded outside access. Note the Lockey hookbolt is aimed at sliding and narrow stile openings, which is a different problem than a swing door deadbolt.
16) Can I add the BEST 8T deadbolt above an existing lever lockset for extra security?
That is the intended use. It is an auxiliary deadbolt, UL listed as an auxiliary lock type on 3-hour fire doors, so it goes above the primary lockset rather than replacing it. Standard tubular prep applies: 2-1/8 inch bore with a 2-3/8 or 2-3/4 inch backset on a 1-3/4 inch door. Match the finish code to the existing lockset (605, 606, 611, 612, 613, 619, 625, 626, 626AM, or 690) so the two look like one set on the door.
17) What is the difference between the Codelocks CL510 and CL610 back-to-back units when I need code entry on both sides?
Both are back-to-back tubular latchbolt units rated heavy duty, with the CL510 and CL515 in the Codelocks CL500 Series and the CL610 and CL615 in the CL600 Series. Either one gives you code entry on each face of the door, which is what a BEST 8T Series deadbolt cannot do, since the 8T is non-keyed and operated by thumbturn from one side only. Match the series to whatever Codelocks hardware is already standing on your other openings so the programming procedure stays the same across the building.
18) I need a decorative lever look on the inside of a closet door, not a thumbturn. What are my options?
The BEST 8T Series presents a thumbturn on the inside face and a blank plate on the outside, a plain functional appearance suited to storage and utility doors. Where the interior face wants a lever profile instead, the Kwikset interior dummy handleset trim range gives you several rose and lever styles: the KWI-968HFLRDT Halifax lever with round rose, the KWI-968HFLSQT Halifax lever with square rose, and the KWI-968LSLSQT Lisbon lever with square rose. All three are dummy function, so understand the swap plainly, they provide the look and the pull but throw no bolt, while the 8T secures the door.
19) What trim comes with the BEST 8T deadbolt, and do I need to order anything separately?
Trim is wrought brass or bronze, either a rose or a turned lever rose, 2-3/4 inches in diameter to cover a 2-1/8 inch bore, with a machined brass or bronze cylinder ring. The strike is included and comes in four ANSI patterns, so pick the one matching your frame prep. What you specify on the order is backset (2-3/8 for the 8T2, 2-3/4 for the 8T3) and finish. Templates for marking the door come with the lock.
How fast can I get the BEST 8T30KLSTK626 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 8T30KLSTK626 come with a warranty?
Absolutely. The BEST 8T30KLSTK626 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 8T30KLSTK626?
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
Why buy the BEST 8T30KLSTK626 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!