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

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

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

The BEST 8K Series Patio 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 2 1/8" door holes and adjustable for door thickness from 1 3/8" to 2", this Grade 1 certified lock exceeds ANSI requirements for security and reliability in demanding commercial environments.

Professional Features & Benefits

• Heavy-Duty Construction: Knobs machined from solid brass or bronze bar stock with brass or bronze roses reinforced with steel liner for exceptional durability in commercial applications.
• Grade 1 Certification: Exceeds ANSI Grade 1 requirements for security and reliability, ensuring professional-grade performance in high-traffic environments.
• Precision Dimensions: 2 1/16" diameter chassis fits standard 2 1/8" door holes with adjustable door thickness accommodation from 1 3/8" to 2" for versatile installation options.
• Enhanced Security Features: 9/16" throw deadlocking latch with no keeper hole on keyed knobs and snap-on inside rose with no exposed screws to deter attack attempts.
• Smooth Operation: Steel retractor with low friction bearings and long bearing length in chassis provide smooth, wear-resistant operation throughout the lock’s service life.
• Versatile Rose Options: Available with multiple rose styles including round 3 3/4" diameter (A), round 2 9/16" diameter (C), and convex round 3 3/8" diameter (D) for various aesthetic preferences.
• Professional Strike Options: Standard STK strike (2 3/4" x 1 1/8") and optional S3 strike (4 7/8" x 1 1/4") available to accommodate different door and frame configurations.
• Corrosion-Resistant Components: Internal parts are brass or corrosion-treated steel designed for long product life and reliable performance in demanding environments.

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: Patio/Privacy
• 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" latch hole dimensions.
2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for proper chassis and strike alignment.
3. Prepare door by drilling 2 1/8" diameter hole for chassis and 1" diameter hole in door edge for latch housing as specified in manufacturer instructions.
4. Install chassis, latch assembly, and strike hardware securing all components per manufacturer torque specifications with provided screws.
5. Adjust knob operation and latch alignment for proper engagement with strike and smooth operation throughout the full range of motion.
6. Test lock operation to verify proper latch function, knob rotation, and strike engagement. Make final adjustments as needed and 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 in Non-ADA Compliant Regions

Why Choose BEST Quality?

BEST 8K Series cylindrical knob locks deliver professional-grade reliability with solid brass or bronze construction and Grade 1 certification that exceeds ANSI requirements for security and performance. Internal components feature corrosion-resistant treatment and precision engineering including steel retractor with low friction bearings for long-term dependable operation. Engineered for demanding commercial applications where heavy-duty construction and reliable security performance are essential.