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

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

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

The BEST 8K Series Hotel Function Single Cylinder Grade 1 Heavy Duty Knob Lock delivers dependable security for high-traffic commercial environments. Featuring knobs machined from solid brass or bronze bar stock with a 2 1/8" diameter and 2 7/8" projection, this Grade 1 cylindrical lock exceeds ANSI requirements for security and reliability. The 9/16" throw deadlocking latch provides secure engagement, while the 2 1/16" diameter chassis fits standard 2 1/8" door preparations with adjustable door thickness from 1 3/8" to 2".

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 proven performance in high-traffic environments.
• Secure Latch Design: 9/16" throw deadlocking latch with 2 1/4" x 1 1/8" beveled front provides reliable engagement and security.
• 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.
• Enhanced Security Features: Keyed knob removable only after core removal, snap-on inside rose with no exposed screws, and no keeper hole design for added protection.
• Smooth Operation: Steel retractor with low friction bearings and long bearing length in chassis for wear-resistant, reliable performance.
• Quick Rekeying: BEST interchangeable core system allows economical rekeying without lock replacement.
• Vandal Resistance: Optional breakaway feature prevents lockset from being overpowered by wrenches or tools.

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
• Product Attribute: Cylindrical Locks
• Product Category: Mechanical Locks
• Product Function: Faculty/Hotel/Restroom
• 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 2 1/8" bore for lock housing, 1" hole for latch tube, and door thickness compatibility from 1 3/8" to 2".
2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for proper chassis and latch installation.
3. Prepare door by drilling required 2 1/8" diameter bore and 1" latch hole, ensuring proper alignment and door edge preparation.
4. Install chassis, latch assembly, and trim components according to manufacturer torque specifications, ensuring proper rose threading and secure mounting.
5. Adjust knob operation for smooth function, verify deadlocking latch engagement, and test rotating knob face for proper hand-of-door operation.
6. Test lock operation with key and verify proper latch throw, knob function, and security features. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

• Hotel and Hospitality Guest Rooms
• Commercial Office Buildings
• Educational Facility Classrooms
• Healthcare Institution Patient Rooms
• Government and Military Facilities
• Multi-Tenant Residential Properties
• Industrial and Warehouse Administrative Areas

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 feature corrosion-resistant treatment and steel retractors with low friction bearings for long-term durability in demanding commercial applications. Engineered for heavy-duty use where dependable security and smooth operation are essential.