BEST 9K Series NX Grade 1 Cylindrical Exit Lock with Non-Keyed Lever

BEST 9K Series NX Grade 1 Cylindrical Exit Lock with Non-Keyed Lever

Premium Commercial-Grade Exit Lock Solution

The BEST 9K Series NX cylindrical lock delivers Grade 1 performance for demanding commercial applications requiring exit-only functionality. This non-keyed lever lock features a 2-3/4" backset with 9/16" latch throw and accommodates door thicknesses from 1-3/4" to 2-1/4". Built with critical latch and chassis components in brass or corrosion-treated steel, this lock meets BHMA A156.2 Series 4000 Grade 1 standards and UL 3-hour fire rating requirements.

Professional Features & Benefits

• Grade 1 Heavy-Duty Construction: BHMA A156.2 Series 4000 Grade 1 rated with brass or corrosion-treated steel critical components for maximum durability in high-traffic commercial environments.
• Standard Door Compatibility: 2-3/4" backset with 9/16" latch throw designed for 1-3/4" to 2-1/4" door thickness applications, with spacers available for 1-3/8" doors.
• Attack-Resistant Design: Rose locking pin and assembly design with slotted key release cam and locking lug assembly provide maximum torque resistance and prevent twisting, bending, or breaking under attack.
• Reinforced Mounting System: Strong through-bolt mounting studs with heavy rose liner material increase torque resistance and attack resistance for enhanced security.
• Smooth Operation: Hub-mounted torsion spring and strong retractor springs prevent lever sag while providing smooth and snappy operation throughout the lock’s service life.
• Fire-Rated Compliance: UL listed for use on 3-hour A label single or double swinging doors, meeting critical fire safety requirements for commercial buildings.
• ADA Compliant Design: Meets ANSI A117.1 section 404.2.6 requirements for accessibility compliance in commercial applications.
• 10-Year Manufacturer Warranty: Comprehensive 10-year warranty coverage provides long-term protection and confidence in demanding commercial installations.

Technical Specifications

• ANSI/BHMA: F89
• Backset (Distance): 2-3/4"
• Commercial/Residential: Commercial
• Department: Door Hardware
• Door Hand Direction: Non-Handed
• Duty Level: Heavy Duty
• Electronic: No
• Function Description: Latch operated by Rotating the inside lever. Outside lever is always fixed and inside lever is always unlocked and cannot be locked.
• Grade: Grade 1
• Handle Type: Lever
• Keyed: No
• Keyed Function: Non-Keyed
• Lock Function: Exit Only
• Lock Type: Cylindrical
• PDF:9K Series Catalog: https://zensupply.com/content/pdf/best/BA-0003_BEST_9K-Catalog-03-24.pdf
• PDF:Service Manual for 9K Series: https://zensupply.com/content/pdf/best/4418941408539
• Product Attribute: Cylindrical Locks
• Product Category: Mechanical Locks
• Product Function: Exit
• Product Group: Mechanical Locks
• Product Model: NX
• Product Subgroup: Bored Locksets
• Product Substrate: Corrosion-Treated Steel
• Product Type: Leversets
• Series: 9K Series
• Standard Latch: 9/16" Throw
• Standard Strike: 2-3/4 x 1-1/8" with curved lip and box
• Subcategory: Cylindrical Locks
• Warranty: 10 Year

Installation & Operation

1. Review manufacturer specifications and verify door preparation requirements including door thickness from 1-3/4" to 2-1/4", 2-3/4" backset, and non-handed installation compatibility.
2. Use manufacturer-provided templates to mark mounting hole locations accurately including standard ANSI A115.2 preparation plus two additional 5/16" diameter through-bolt holes at 12 o’clock and 6 o’clock positions.
3. Prepare door by drilling required holes including 2-1/8" diameter chassis hole and through-bolt mounting holes as specified in manufacturer instructions.
4. Install through-bolt mounting studs and secure the lock chassis to door per manufacturer torque specifications for maximum attack resistance.
5. Adjust lever operation and latch alignment for proper function, ensuring inside lever rotates freely while outside lever remains fixed per exit-only function.
6. Test lock operation to verify proper latching, smooth lever operation, and exit functionality. 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

Anti-Microbial Option

BEST UltraShield™ antimicrobial protected coating available in 626AM satin chrome finish inhibits the growth of bacteria and other microbes on hardware surfaces. Recommended for healthcare, elderly care, education, transportation, food service, and hospitality applications where product cleanliness is a high priority.

Why Choose BEST Quality?

BEST 9K Series cylindrical locks deliver professional-grade reliability with brass and corrosion-treated steel construction rated for Grade 1 heavy-duty commercial applications. The innovative attack-resistant design with reinforced mounting system and 10-year manufacturer warranty ensures dependable performance in demanding environments. Engineered for commercial applications where security, durability, and code compliance are essential.