BEST 9K Series Grade 1 Corridor Cylindrical Lever Lock with Keyed Function

BEST 9K Series Grade 1 Corridor Cylindrical Lever Lock with Keyed Function

Premium Commercial-Grade Security Solution

The BEST 9K Series Corridor (C) Lock delivers professional-grade security with Grade 1 BHMA certification and heavy-duty construction. This cylindrical lever lock features a 2-3/4" backset, 9/16" latch throw, and accommodates door thicknesses from 1-3/4" to 2-1/4". Built with critical brass and corrosion-treated steel components, the 9K series combines exceptional craftsmanship with innovative design for demanding commercial applications.

Professional Features & Benefits

• Door Compatibility: Designed for 1-3/4" to 2-1/4" door thickness with 2-3/4" standard backset for versatile installation options.
• Heavy-Duty Construction: Critical latch and chassis components are brass or corrosion-treated steel with zinc hubs and hardened steel alloy sleeve for maximum durability.
• Grade 1 Performance: BHMA A156.2 Series 4000 Grade 1 certification ensures superior performance in high-traffic commercial applications.
• Attack-Resistant Design: Rose locking pin assembly and slotted key release cam provide exceptional torque resistance and prevent damage under attack conditions.
• Smooth Operation: Hub-mounted torsion spring and strong retractor springs prevent lever sag while delivering smooth, snappy operation throughout the lock’s service life.
• Fire Rating Compliance: UL listed for use on 3-hour A label doors for single or double swinging door applications.
• Interchangeable Core Ready: Allows for quick re-keying and customized master keying systems for enhanced security management.
• Manufacturer Warranty: 10 Year Limited warranty provides added confidence and long-term protection for commercial installations.

Technical Specifications

• ANSI/BHMA: F88
• 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), Turning the key in the outside lever. Inside lever is always unlocked and cannot be locked.
• Grade: Grade 1
• Handle Type: Lever
• Keyed: Yes
• Keyed Function: Double 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: C
• 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 Limited

Installation & Operation

1. Review manufacturer specifications and verify door preparation requirements including door thickness (1-3/4" to 2-1/4"), backset (2-3/4" standard), and handing as applicable to this product.
2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces, including two additional 5/16" diameter through-bolt holes at 12 o’clock and 6 o’clock positions.
3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions, conforming to ANSI A115.2 standards.
4. Install all mounting hardware including through-bolts and secure the device to door and frame per manufacturer torque specifications.
5. Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion.
6. Test device 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
• Industrial and Warehouse Facilities
• Multi-Tenant Residential Properties
• Government and Municipal Buildings

Anti-Microbial Option

The BEST UltraShield antimicrobial protected coating (finish 626AM) is available for applications where product cleanliness is a high priority, including healthcare, elderly care, education, transportation, food service, and hospitality environments. This finish inhibits the growth of bacteria and other microbes on the hardware surface.

Why Choose BEST Quality?

BEST 9K Series cylindrical locks deliver professional-grade reliability with brass and corrosion-treated steel construction rated for Grade 1 heavy-duty performance. The innovative attack-resistant design and 10 Year Limited warranty provide exceptional value for demanding commercial applications. Engineered with premium materials and exceptional craftsmanship, the 9K series offers the dependable security solution that building professionals trust.