BEST 8K Series Storeroom Function Grade 1 Heavy Duty Cylindrical Knob Lock with SFIC Core

BEST 8K Series Storeroom Function Grade 1 Heavy Duty Cylindrical Knob Lock with SFIC Core

Premium Heavy-Duty Cylindrical 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 demanding commercial applications. This storeroom function cylindrical knob lock features a 2 1/16" diameter chassis for 2 1/8" door holes, 9/16" throw deadlocking latch, and accepts BEST interchangeable cores for flexible key management. Designed to exceed ANSI Grade 1 requirements with premium workmanship and corrosion-resistant internal components for long-term reliability.

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 9/16" throw deadlocking latch and strong retractor springs.
• Enhanced Security Design: Cores must be removed before keyed knobs to deter break-in attempts, with snap-on inside rose featuring no exposed screws for tamper resistance.
• Flexible Door Compatibility: Adjustable for door thickness from 1 3/8" to 2" standard, with special E trim available for 2 1/8" to 3" doors.
• Quick Rekeying System: BEST interchangeable core system allows economical rekeying without lock removal for efficient key management.
• Smooth Operation: Steel retractor with low friction bearings and long bearing length in chassis ensures wear-resistant, reliable operation.
• Versatile Installation: 2 3/4" standard backset with 3 3/4" and 5" options available, plus rotating knob face for easy hand-of-door changes.
• Optional Security Features: Available with breakaway feature to prevent overpowering by wrench, knurled knob for accessibility applications, and spin-free operation.

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: Storeroom
• 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", 2 1/8" bore hole, and 1" edge hole for latch housing.
2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for proper backset alignment.
3. Prepare door by drilling 2 1/8" diameter hole for chassis and 1" hole in door edge for latch housing per manufacturer specifications.
4. Install latch assembly in door edge and secure chassis in door bore hole, ensuring proper alignment with strike preparation on frame.
5. Adjust knob projection and rose positioning for proper door thickness accommodation and smooth operation throughout full range of motion.
6. Test lock operation with key and verify proper latching, deadlocking function, and smooth knob rotation. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

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

Anti-Microbial Option

Optional Agion® antimicrobial finish available for enhanced hygiene in healthcare and high-touch applications, providing continuous protection against harmful microorganisms on door hardware surfaces.

Why Choose BEST Quality?

BEST 8K Series cylindrical locks deliver professional-grade reliability with solid brass or bronze construction and steel-reinforced components designed to exceed ANSI Grade 1 performance standards. Premium workmanship and corrosion-resistant internal parts ensure dependable operation in demanding commercial applications where security and durability are essential. Engineered for heavy-duty use with proven reliability in high-traffic environments.