BEST 9K Series Grade 1 Cylindrical Entrance/Office Lock with Keyed Lever

BEST 9K Series Grade 1 Cylindrical Entrance/Office Lock with Keyed Lever

Premium Commercial-Grade Security Solution

The BEST 9K Series cylindrical lock delivers exceptional quality, performance, and security for demanding commercial applications. This Grade 1 entrance/office lock features a 2-3/4" backset with 9/16" latch throw and accommodates door thickness from 1-3/4" to 2-1/4". Built with critical latch and chassis components of brass or corrosion-treated steel, the 9K series combines top-quality materials with exceptional craftsmanship for long-lasting reliability.

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 featuring shrouded locking lug for maximum torque resistance.
• Attack-Resistant Design: Rose locking pin and assembly design prevents twisting, bending, or breaking under attack while maintaining key access even when damaged.
• Smooth Operation: Hub-mounted torsion spring and strong retractor springs prevent lever sag and provide smooth, snappy operation throughout the full range of motion.
• Reinforced Mounting: Strong through-bolt mounting studs with two 5/16" diameter holes at 12 and 6 o'clock positions increase torque resistance and security.
• Interchangeable Core System: Allows for quick re-keying and customized master keying for flexible access control management.
• Lost Motion Feature: Optional 45° lever rotation in either direction without engaging retractor assembly for specialized applications.
• Manufacturer Warranty: 10 Year Limited warranty for added confidence and protection in commercial installations.

Technical Specifications

• 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 (only when the inside push button is out), 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: Single Cylinder
• Lock Function: Entrance/Office
• Lock Type: Cylindrical
• Product Attribute: Cylindrical Locks
• Product Category: Mechanical Locks
• Product Function: Entrance/Office
• Product Group: Mechanical Locks
• Product Model: UA
• 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 holes for through-bolts at 12 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-bolt mounting studs 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, ensuring proper function of the entrance/office mechanism.
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 hospitals, healthcare facilities, 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 heavy-duty commercial applications. The 10 Year Limited warranty provides added confidence for demanding installations. Engineered with attack-resistant design features and Grade 1 BHMA certification, the 9K series ensures dependable performance where security and durability are essential.