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

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

Premium Commercial-Grade Security Solution

The BEST 9K Series Classroom Function cylindrical lock delivers professional-grade security with Grade 1 BHMA certification for demanding commercial applications. This heavy-duty 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 corrosion-treated steel chassis and brass components, the 9K series combines exceptional craftsmanship with innovative design for maximum attack resistance and long-lasting performance.

Professional Features & Benefits

• Grade 1 BHMA Certification: Listed by BHMA for A156.2, Series 4000, Grade 1 providing the highest level of commercial security performance.
• Heavy-Duty Construction: Critical latch and chassis components are brass or corrosion-treated steel with zinc hubs and hardened steel alloy outer sleeve for maximum durability.
• Attack-Resistant Design: Rose locking pin and assembly design offers exceptional torque resistance, preventing twisting, bending, or breaking under attack while maintaining key access even when damaged.
• Classroom Function Operation: Outside lever locks and unlocks by turning key in outside lever, inside lever always unlocked and cannot be locked, ideal for educational facility security requirements.
• Fire Rating Compliance: Listed by Underwriters Laboratories for use on 3-hour A label doors for single or double swinging applications.
• Interchangeable Core System: Allows for quick re-keying and customized master keying for flexible access control management.
• Anti-Microbial Option Available: UltraShield™ antimicrobial protected coating inhibits growth of bacteria and microbes on hardware surface for healthcare and high-cleanliness applications.
• 10 Year Limited Warranty: Comprehensive manufacturer warranty provides long-term protection and confidence in professional installations.

Technical Specifications

• ANSI/BHMA: F84
• Backset (Distance): 2-3/4"
• Commercial/Residential: Commercial
• Department: Door Hardware
• Door Hand Direction: Non-Handed
• Duty Level: Heavy Duty
• Electronic: No
• Function Description: Turning the key in the outside lever, Rotating the inside lever/ Rotating the outside lever when not locked by key. Outside lever is locked and unlocked by turning the key in the outside lever. Inside Lever is always unlocked and it Cannot be locked.
• Grade: Grade 1
• Handle Type: Lever
• Keyed: Yes
• Keyed Function: Single Cylinder
• Lock Function: Classroom
• Lock Type: Cylindrical
• PDF:9K Series Catalog: https://zensupply.com/content/pdf/best/BA-0003_BEST_9K-Catalog-03-24.pdf
• PDF:Service Manual for 9K Series: https://zensupply.com/content/pdf/best/4418941408539
• Product Attribute: Cylindrical Locks
• Product Category: Mechanical Locks
• Product Function: Classroom
• Product Group: Mechanical Locks
• Product Model: R
• 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 from 1-3/4" to 2-1/4", 2-3/4" backset, and non-handed operation compatibility.
2. Use manufacturer-provided templates to mark mounting hole locations accurately including standard ANSI A115.2 preparation plus two additional 5/16" diameter through-bolt holes at 12 o'clock and 6 o'clock positions.
3. Prepare door by drilling required holes including 2-1/8" diameter chassis hole and routing as specified in manufacturer instructions.
4. Install all mounting hardware including through-bolts and secure the device to door per manufacturer torque specifications for maximum attack resistance.
5. Adjust operational components for proper alignment, 9/16" latch throw engagement, and smooth lever operation throughout the full range of motion.
6. Test device operation to verify proper classroom function including key locking/unlocking of outside lever and always-free inside lever operation. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

• Educational Facilities and Classrooms
• Commercial Office Buildings
• Healthcare Institutions
• Government and Municipal Buildings
• Multi-Tenant Residential Properties
• Industrial and Warehouse Facilities
• Retail Establishments

Anti-Microbial Option

BEST UltraShield™ antimicrobial protected coating is available as finish option 626AM, providing satin chrome plating with antimicrobial protection that inhibits the growth of bacteria and other microbes on the hardware surface. This option is recommended for healthcare, 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 Grade 1 BHMA certification and corrosion-treated steel construction rated for heavy-duty commercial applications. The 10 Year Limited 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 long-term durability are essential.