BEST 8K Series Exit Non-Keyed Grade 1 Heavy Duty Cylindrical Knob Lock

BEST 8K Series Exit Non-Keyed Grade 1 Heavy Duty Cylindrical Knob Lock

Premium Heavy-Duty Cylindrical Knob Lock for Commercial Applications

The BEST 8K Series delivers Grade 1 heavy-duty performance with knobs machined from solid brass or bronze bar stock for exceptional durability. This non-keyed exit function lock features a 2 1/16" diameter chassis designed for 2 1/8" door holes with adjustable door thickness from 1 3/8" to 2". The 9/16" throw deadlocking latch provides reliable security while exceeding ANSI Grade 1 requirements for commercial applications.

Professional Features & Benefits

• Heavy-Duty Construction: Knobs machined from solid brass or bronze bar stock with steel-reinforced roses for exceptional durability in high-traffic applications.
• Grade 1 Performance: Exceeds ANSI Grade 1 requirements for security and reliability with proven performance in demanding commercial environments.
• Adjustable Door Compatibility: Standard door thickness range of 1 3/8" to 2" with special E trim available for 2 1/8" to 3" doors.
• Precision Engineering: 2 1/16" diameter chassis fits standard 2 1/8" door holes with 9/16" throw deadlocking latch for secure operation.
• Enhanced Security Features: Snap-on inside rose with no exposed screws and optional breakaway feature prevents lockset from being overpowered by wrenches.
• Smooth Operation: Steel retractor with low friction bearings and long bearing length in chassis ensures wear-resistant, reliable performance.
• Versatile Installation: Standard 2 3/4" backset with 3 3/4" and 5" options available, plus multiple rose styles including 3 3/4" round and 2 9/16" round configurations.
• Corrosion Resistance: Internal components treated for corrosion resistance with brass or corrosion-treated steel construction for long product life.

Technical Specifications

• Commercial/Residential: Commercial
• Department: Door Hardware
• Door Hand Direction: Non-Handed
• Duty Level: Heavy Duty
• Electronic: No
• Grade: Grade 1
• Handle Type: Knob
• Keyed: No
• Keyed Function: Non-Keyed
• PDF:8K Sell Sheet: https://zensupply.com/content/pdf/best/8K-Sell-Sheet.pdf
• PDF:8K Series Catalog: https://zensupply.com/content/pdf/best/8K-Series-Catalog.pdf
• PDF:8K Series FAQs: https://zensupply.com/content/pdf/best/8K-Series-FAQs.pdf
• Product Attribute: Cylindrical Locks
• Product Category: Mechanical Locks
• Product Function: Exit
• Product Group: Mechanical Locks
• Product Subgroup: Bored Locksets
• Product Type: Knobsets
• Series: 8K Series
• Subcategory: Bored Locksets

Installation & Operation

1. Review manufacturer specifications and verify door preparation requirements including door thickness range of 1 3/8" to 2" and 2 1/8" bore hole diameter.
2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for the selected backset configuration.
3. Prepare door by drilling the required 2 1/8" diameter hole for the chassis and 1" hole in door edge for the latch housing.
4. Install the chassis, latch assembly, and trim components according to manufacturer specifications, ensuring proper alignment of the 9/16" throw deadlocking latch.
5. Adjust knob operation and rose positioning for smooth function throughout the full range of motion, utilizing the rotating knob face feature for proper door hand configuration.
6. Test lockset operation to verify proper latch engagement and smooth knob operation. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

• Commercial Office Buildings
• Educational Facilities
• Healthcare Institutions
• Government and Military Facilities
• Industrial and Warehouse Facilities
• Multi-Tenant Residential Properties
• High-Traffic Commercial Environments

Break-Away Protection Design

The optional breakaway feature prevents the lockset from being overpowered by a wrench, providing enhanced vandal resistance in vulnerable installations. This security enhancement helps protect the lock mechanism from forced entry attempts while maintaining normal operational functionality.

Why Choose BEST Quality?

BEST 8K Series cylindrical knob locks deliver professional-grade reliability with solid brass or bronze construction that exceeds ANSI Grade 1 requirements for demanding commercial applications. The precision-machined components and corrosion-treated internal parts ensure long-term performance in high-traffic environments. Engineered for dependable security where reliable access control and durability are essential.