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

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

• T Series Sell Sheet
• T Series FAQs
• T Series Catalog
• T Series Green Circle Certificate
• BEST Product Warranty Reference Chart

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.