BEST 6K Series Office/Entry Function Grade 2 Single Cylinder Knob Lock with SFIC Core

BEST 6K Series Office/Entry Function Grade 2 Single Cylinder Knob Lock with SFIC Core

Professional Grade 2 Cylindrical Lock Solution

The BEST 6K Series knob lock delivers reliable performance for standard traffic commercial applications with Grade 2 ANSI certification. This single cylinder knob lock features BEST interchangeable core technology for quick rekeying, brass and bronze construction with corrosion-treated internal steel mechanisms, and accommodates door thickness from 1 3/8" to 1 7/8". UL listed for 3-hour fire rating and BHMA certified to A156.2 Series 4000 Grade 2 standards.

Professional Features & Benefits

• Door Compatibility: Accommodates door thickness from 1 3/8" to 1 7/8" with threaded outside rose adjustment for precise fit.
• Quick Rekeying System: BEST interchangeable core allows rapid key changes without disassembly for enhanced security management.
• Durable Construction: Brass and bronze component parts with corrosion-treated internal steel mechanisms for long-term reliability.
• Concealed Mounting: Snap-on inside rose design eliminates exposed mounting screws for clean appearance and tamper resistance.
• Fire Rating Certification: UL listed for use on 3-hour A label single doors up to 4' x 8' for code compliance.
• Grade 2 Performance: BHMA certified to A156.2 Series 4000 Grade 2 standards exceeding minimum requirements for commercial applications.
• Reversible Operation: Lockset reversible for either hand of door without removing keyed knob for installation flexibility.
• Deadlocking Security: 1/2" throw deadlocking latch provides positive engagement for enhanced security.

Technical Specifications

• Commercial/Residential: Commercial
• Department: Door Hardware
• Duty Level: Medium Duty
• Electronic: No
• Grade: Grade 2
• Handle Type: Knob
• Keyed: No
• Keyed Function: Single Cylinder
• Product Attribute: Cylindrical Locks
• Product Category: Mechanical Locks
• Product Function: Office
• Product Group: Mechanical Locks
• Product Subgroup: Bored Locksets
• Product Type: Knobsets
• Series: 6K Series
• Standard Latch: 1/2" Throw
• Standard Strike: 2-3/4" x 1-1/8" with Curved Lip
• Subcategory: Bored Locksets

Installation & Operation

1. Review manufacturer specifications and verify door preparation requirements including door thickness from 1 3/8" to 1 7/8", 2 1/8" diameter bore for lock housing, and 1" or 7/8" diameter for latch tube.
2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for proper alignment.
3. Prepare door by drilling required 2 1/8" bore hole and latch tube opening according to backset specifications (2 3/8" for 62K, 2 3/4" for 63K, 3 3/4" for 64K, or 5" for 65K Series).
4. Install latch assembly and secure the knob lock to door using threaded outside rose adjustment for proper door thickness accommodation.
5. Adjust snap-on inside rose for concealed mounting and verify keyed knob removal requires core removal for security.
6. Test lockset operation to verify proper function, deadlocking latch engagement, and reversible operation. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

• Commercial Office Buildings
• Educational Facilities
• Healthcare Institutions
• Retail Establishments
• Industrial and Warehouse Facilities
• Multi-Tenant Residential Properties
• Government and Municipal Buildings

Why Choose BEST Quality?

BEST 6K Series knob locks deliver professional-grade reliability with brass and bronze construction and corrosion-treated internal mechanisms rated to exceed ANSI Grade 2 standards. UL listed for 3-hour fire rating and BHMA certified for demanding commercial applications. Engineered for standard traffic applications where dependable performance and quick rekeying capability are essential.