BEST 8K Series Grade 1 Heavy Duty Passage Knob Lock with Non-Keyed Operation

BEST 8K Series Grade 1 Heavy Duty Passage Knob Lock with Non-Keyed Operation

Premium Heavy-Duty Cylindrical Knob Lock for Commercial Applications

The BEST 8K Series Grade 1 Heavy Duty Passage Knob Lock delivers professional-grade security and durability for high-traffic commercial environments. This non-keyed passage function lock features knobs machined from solid brass or bronze bar stock with a 2 1/8" diameter and 2 7/8" projection from door. Built with a 2 1/16" diameter chassis to fit standard 2 1/8" door holes, the lock includes a 9/16" throw deadlocking latch and accommodates door thicknesses from 1 3/8" to 2" standard. Exceeds ANSI Grade 1 requirements for commercial heavy-duty applications.

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 Performance: Exceeds ANSI Grade 1 requirements for security and reliability with strong retractor springs and premium internal components.
• Flexible Door Compatibility: 2 1/16" diameter chassis fits standard 2 1/8" door holes with adjustable door thickness from 1 3/8" to 2" standard.
• Professional Latch System: 9/16" throw deadlocking latch with 2 1/4" x 1 1/8" beveled front fits 1" hole in door edge.
• Enhanced Security Design: Snap-on inside rose with no exposed screws and friction insert inside rose resists loosening for added security.
• Smooth Operation: Steel retractor with low friction bearings and long bearing length in chassis for wear-resistant, smooth operation throughout product life.
• 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 Break-Away Protection: Available breakaway feature prevents lockset from being overpowered by wrench attacks for enhanced vandal resistance.

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
• Product Attribute: Cylindrical Locks
• Product Category: Mechanical Locks
• Product Function: Passage/Hall/Closet
• 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 (1 3/8" to 2" standard), 2 1/8" bore hole, and 1" edge hole for latch.
2. Use manufacturer-provided templates to mark mounting hole locations accurately on door surfaces for proper chassis and latch positioning.
3. Prepare door by drilling required 2 1/8" diameter hole for chassis and 1" hole in door edge for latch housing per specifications.
4. Install chassis, latch assembly, and mounting hardware securing the device to door per manufacturer torque specifications with appropriate strike plate.
5. Adjust knob operation and latch alignment for proper function, ensuring smooth operation and proper deadlocking latch engagement.
6. Test device operation to verify proper passage 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
• Government and Military Facilities
• Industrial and Warehouse Facilities
• Multi-Tenant Residential Properties
• International Projects Without ADA Requirements

Anti-Microbial Option

BEST offers Agion® antimicrobial finish options for healthier door hardware applications. This advanced coating provides continuous antimicrobial protection for enhanced hygiene in healthcare, educational, and high-touch commercial environments.

Why Choose BEST Quality?

BEST 8K Series knob locks deliver professional-grade reliability with solid brass or bronze construction and steel-reinforced components that exceed ANSI Grade 1 requirements. Premium workmanship and carefully designed internal components ensure long-term performance in demanding commercial applications. Engineered for high-traffic environments where dependable operation and enhanced security are essential.