BEST 8K Series Service Station Function Single Cylinder Grade 1 Heavy Duty Knob Lock

BEST 8K Series Service Station Function Single Cylinder Grade 1 Heavy Duty Knob Lock

Premium Grade 1 Cylindrical Knob Lock for Heavy-Duty Commercial Applications

The BEST 8K Series delivers dependable security in high traffic commercial environments with knobs machined from solid brass or bronze bar stock. This Grade 1 heavy-duty cylindrical knob lock features a 9/16" throw deadlocking latch, 2 1/16" diameter chassis for 2 1/8" door bore, and adjustable door thickness from 1 3/8" to 2" standard. Exceeds ANSI Grade 1 requirements for security and reliability with corrosion-resistant internal components designed for long-term performance.

Professional Features & Benefits

• Heavy-Duty Construction: Knobs machined from solid brass or bronze bar stock with steel-reinforced roses for exceptional durability in commercial applications.
• Grade 1 Security Performance: Exceeds ANSI Grade 1 requirements with 9/16" throw deadlocking latch and enhanced security features including core removal requirement before knob removal.
• Flexible Door Compatibility: 2 1/16" diameter chassis fits standard 2 1/8" door bore with adjustable thickness from 1 3/8" to 2" standard, special E trim available for 2 1/8" to 3" doors.
• Quick Economical Rekeying: BEST interchangeable core system allows rapid rekeying without lock removal for efficient key management.
• Enhanced Security Design: Keyed knob removable only after core removal, snap-on inside rose with no exposed screws, and no keeper hole on keyed knobs for added protection.
• Smooth Operation: Steel retractor with low friction bearings and long bearing length in chassis provide wear-resistant, reliable operation throughout the lock's service life.
• Vandal-Resistant Options: Optional breakaway feature prevents lockset from being overpowered by wrench attacks, rotating knob face allows hand changes without knob removal.
• Corrosion Protection: Internal components treated for corrosion resistance with brass or corrosion-treated steel construction for extended 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: Yes
• Keyed Function: Single Cylinder
• 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
• PDF:8K Series Service Manual: https://zensupply.com/content/pdf/best/8K-Series-Service-Manual.pdf
• PDF:Agion® Antimicrobial Finish for Healthier Door Hardware: https://zensupply.com/content/pdf/best/Agion%C2%AE-Antimicrobial-Finish-for-Healthier-Door-Hardware.pdf
• PDF:Antimicrobial Protected Door Hardware Brochure: https://zensupply.com/content/pdf/best/Antimicrobial-Protected-Door-Hardware-Brochure.pdf
• PDF:BEST Product Warranty Reference Chart: https://zensupply.com/content/pdf/best/KAA1446-Product-Warranty-Reference-Chart.pdf
• Product Attribute: Cylindrical Locks
• Product Category: Mechanical Locks
• Product Function: Service Station
• Product Group: Mechanical Locks
• Product Subgroup: Bored Locksets
• Product Type: Knobsets
• Series: 8K Series
• Standard Cylinder: 7-pin housing, accepts all BEST cores (less SFIC core)
• Subcategory: Bored Locksets

Installation & Operation

1. Review manufacturer specifications and verify door preparation requirements including door thickness from 1 3/8" to 2" standard, 2 1/8" bore diameter, and 1" edge bore for latch housing.
2. Use manufacturer-provided templates to mark mounting hole locations accurately on door surfaces for proper chassis and latch alignment.
3. Prepare door by drilling required 2 1/8" bore hole and 1" edge hole, ensuring proper door thickness compatibility with standard or special E trim options.
4. Install chassis, latch assembly, and strike hardware securing all components per manufacturer torque specifications with provided mounting screws.
5. Adjust knob projection (2 7/8" standard), rose configuration, and operational components for proper alignment, latching, and smooth operation throughout full range of motion.
6. Test device operation including key function, latch engagement, and deadlocking mechanism to verify proper function and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

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

Why Choose BEST Quality?

BEST 8K Series knob locks deliver professional-grade reliability with solid brass or bronze construction and Grade 1 performance that exceeds ANSI requirements. Internal components are treated for corrosion resistance and designed with steel retractors and low friction bearings for long-term durability in demanding commercial applications. Engineered for heavy-duty performance where dependable security and smooth operation are essential.