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

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

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

The BEST 8K Series Privacy Non-Keyed Grade 1 Heavy Duty Cylindrical Knob Lock delivers dependable security for high-traffic commercial applications. This premium knob set features knobs machined from solid brass or bronze bar stock with a 2 1/8" diameter and 2 7/8" projection from door. Designed with a 2 1/16" diameter chassis to fit standard 2 1/8" door holes and adjustable for door thickness from 1 3/8" to 2", this Grade 1 lock exceeds ANSI requirements for security and reliability with a 9/16" throw deadlocking latch.

Professional Features & Benefits

• Grade 1 Heavy-Duty Construction: Exceeds ANSI Grade 1 requirements with knobs machined from solid brass or bronze bar stock for exceptional durability in commercial applications.
• Precision Dimensions: 2 1/8" diameter knobs with 2 7/8" projection and 2 1/16" diameter chassis designed for standard 2 1/8" door bore holes.
• Adjustable Door Compatibility: Standard adjustment accommodates door thickness from 1 3/8" to 2" with special E trim available for 2 1/8" to 3" doors.
• Enhanced Security Features: Snap-on inside rose with no exposed screws and rotating knob face for easy hand-of-door changes without knob removal.
• Smooth Operation: Steel retractor with low friction bearings and long bearing length in chassis ensures wear-resistant, reliable performance.
• Professional Latch System: 9/16" throw deadlocking latch with 2 1/4" x 1 1/8" beveled front fits standard 1" edge bore.
• Corrosion-Resistant Components: Internal parts are brass or corrosion-treated steel with brass or bronze roses reinforced with steel liner for long product life.
• Optional Breakaway Protection: Available breakaway feature prevents lockset damage from wrench attacks while maintaining security integrity.

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 Series Catalog: https://zensupply.com/content/pdf/best/8K-Series-Catalog.pdf
• PDF:Service Manual for 8K Series: https://zensupply.com/content/pdf/best/4418820857627
• Product Attribute: Cylindrical Locks
• Product Category: Mechanical Locks
• Product Function: Privacy/Bed/Bath
• 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 from 1 3/8" to 2" and standard 2 1/8" bore hole with 1" edge bore for latch.
2. Use manufacturer-provided templates to mark mounting hole locations accurately on door surfaces for the 2 1/16" diameter chassis.
3. Prepare door by drilling required 2 1/8" bore hole and 1" edge bore as specified in manufacturer instructions.
4. Install chassis and secure the lockset components to door per manufacturer torque specifications using threaded rose system.
5. Adjust knob alignment and rose positioning for proper operation and verify smooth knob rotation throughout full range of motion.
6. Test lockset operation to verify proper latch function with 9/16" throw 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

Why Choose BEST Quality?

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