BEST 9K Series Dormitory (T) Grade 1 Cylindrical Lever Lock with 2-3/4" Backset
Premium Grade 1 Cylindrical Lock for Commercial Applications
The BEST 9K Series Dormitory (T) Lock delivers professional-grade security with Grade 1 BHMA certification and heavy-duty construction. Featuring a 2-3/4" backset, 9/16" latch throw, and corrosion-treated steel chassis, this cylindrical lever lock is engineered for demanding commercial applications. The dormitory function provides inside lever operation at all times while outside lever access is controlled by key or push button, making it ideal for educational facilities and multi-tenant buildings.
Professional Features & Benefits
- Grade 1 BHMA Certification: Listed by BHMA for A156.2, Series 4000, Grade 1 for maximum durability and security in commercial applications.
- Heavy-Duty Construction: Critical latch and chassis components are brass or corrosion-treated steel with zinc hubs and hardened steel alloy sleeve for exceptional torque resistance.
- Attack-Resistant Design: Rose locking pin assembly and slotted key release cam provide maximum attack resistance while maintaining key access even when damaged.
- Smooth Operation: Hub-mounted torsion spring and strong retractor springs prevent lever sag and deliver smooth, snappy operation throughout the lock’s service life.
- Fire Rating Compliance: Listed by Underwriters Laboratories for use on 3-hour A label doors for single or double swinging applications.
- Interchangeable Core Ready: Allows for quick re-keying and customized master keying systems for flexible access control management.
- Anti-Microbial Option Available: UltraShield antimicrobial protected coating (626AM finish) inhibits bacterial growth for healthcare and high-cleanliness applications.
- 10-Year Manufacturer Warranty: Comprehensive warranty coverage provides long-term confidence and protection for commercial installations.
Technical Specifications
- ANSI/BHMA: F90
- Backset (Distance): 2-3/4"
- Commercial/Residential: Commercial
- Department: Door Hardware
- Door Hand Direction: Non-Handed
- Duty Level: Heavy Duty
- Electronic: No
- Function Description: Latch operated by: Rotating the inside lever/ outside lever (when not locked by key or push button). Inside lever is always unlocked and cannot be locked.
- Grade: Grade 1
- Handle Type: Lever
- Keyed: Yes
- Keyed Function: Single Cylinder
- Lock Function: Corridor/Dormitory
- Lock Type: Cylindrical
- Product Attribute: Cylindrical Locks
- Product Category: Mechanical Locks
- Product Function: Corridor/Dormitory
- Product Group: Mechanical Locks
- Product Model: T
- Product Subgroup: Bored Locksets
- Product Substrate: Corrosion-Treated Steel
- Product Type: Leversets
- Series: 9K Series
- Standard Latch: 9/16" Throw
- Standard Strike: 2-3/4 x 1-1/8" with curved lip and box
- Subcategory: Cylindrical Locks
- Warranty: 10 Year
Installation & Operation
- Review manufacturer specifications and verify door preparation requirements including 1-3/4" to 2-1/4" door thickness and standard ANSI A115.2 bore preparation.
- Use manufacturer-provided drill jig to mark mounting hole locations accurately, including two additional 5/16" diameter through-bolt holes at 12 o’clock and 6 o’clock positions.
- Prepare door by drilling required 2-1/8" bore hole and routing for latch and strike preparation per ANSI A115.2 specifications.
- Install chassis assembly and secure with through-bolts per manufacturer torque specifications for maximum attack resistance.
- Adjust latch throw (9/16" standard) and verify proper alignment with strike plate for smooth latching operation.
- Test lock operation including key function, lever operation, and dormitory function to verify proper installation. Refer to manufacturer documentation for complete installation details and troubleshooting.
Professional Applications
- Educational Facilities and Dormitories
- Healthcare Institutions
- Commercial Office Buildings
- Multi-Tenant Residential Properties
- Government and Municipal Buildings
- Hospitality and Hotel Properties
- Industrial and Warehouse Facilities
Anti-Microbial Option
The BEST UltraShield antimicrobial protected coating (626AM finish) inhibits the growth of bacteria and other microbes on the hardware surface. This option is recommended for healthcare facilities, elderly care, education, transportation, food service, and hospitality applications where product cleanliness is a high priority.
Why Choose BEST Quality?
BEST 9K Series cylindrical locks deliver professional-grade reliability with brass and corrosion-treated steel construction rated for Grade 1 commercial applications. The 10-year manufacturer warranty and UL listing for 3-hour fire doors demonstrate BEST’s commitment to quality and performance. Engineered for demanding commercial applications where dependable security and smooth operation are essential.
Manufacturer Resources
Product Specs
- Series:
- 9K Series
- Subcategory:
- Cylindrical Locks
- Grade:
- Grade 1
- Duty Level:
- Heavy Duty
- Handle Type:
- Lever
- Keyed Function:
- Single Cylinder
- Warranty:
- 10 Year
- Standard Latch:
- 9/16" Throw
- Standard Strike:
- 2-3/4 x 1-1/8" with curved lip and box
- ANSI/BHMA:
- F90
- Product Group:
- Mechanical Locks
- Product Subgroup:
- Bored Locksets
- Product Type:
- Leversets
- Keyed:
- Yes
- Electronic:
- No
- Commercial/Residential:
- Commercial
- Function Description:
- Latch operated by: Rotating the inside lever/ outside lever (when not locked by key or push button). Inside lever is always unlocked and cannot be locked.
- Lock Type:
- Cylindrical
- Lock Function:
- Corridor/Dormitory
- Product Attribute:
- Cylindrical Locks
- Product Model:
- T
- Product Function:
- Corridor/Dormitory
- Door Hand Direction:
- Non-Handed
- Product Category:
- Mechanical Locks
- Product Substrate:
- Corrosion-Treated Steel
- Backset (Distance):
- 2-3/4"
- Department:
- Door Hardware