Falcon X521 Heavy Duty Grade 1 Office Cylindrical Lock with Single Cylinder

Falcon X521 Heavy Duty Grade 1 Office Cylindrical Lock with Single Cylinder

Professional Heavy-Duty Cylindrical Lock Solution

The Falcon X521 delivers Grade 1 commercial-grade security with heavy-duty cylindrical knob lock construction designed for demanding office applications. This UL listed lock accommodates door thickness ranges from 1-3/8" to 2-1/4" with a standard 2-3/4" backset and features interchangeable cores for convenient re-keying. ANSI/BHMA A156.2 Series 4000 Grade 1 certified for maximum durability and UL 3-hour A label fire rated for life safety compliance.

Professional Features & Benefits

• Door Compatibility: Accommodates door thickness from 1-3/8" to 2-1/4" with 2-3/4" backset for versatile installation options.
• Grade 1 Durability: ANSI/BHMA A156.2 Series 4000 Grade 1 certification ensures maximum performance in high-traffic commercial applications.
• Interchangeable Core System: Quick and convenient re-keying with cores compatible with SFIC products from other manufacturers for flexible key management.
• Heavy-Duty Construction: Brass or cold-formed steel construction with zinc dichromate coating provides superior rust resistance and long-term reliability.
• Fire Safety Compliance: UL 3-hour A label fire rating meets critical life safety requirements for commercial buildings.
• Reinforced Rose Design: Heavy-wrought brass, bronze or stainless steel roses over steel through-bolted rose inserts provide exceptional strength and security.
• XC Construction Option: Optional stainless steel and nonferrous chassis with stainless steel trim resists corrosion in marine and high-moisture environments.
• Manufacturer Warranty: 10-year limited warranty provides long-term protection and confidence in product reliability.

Technical Specifications

• ANSI/BHMA: F81
• Backset (Distance): 2-3/4",Strike,5185 - Square Corner
• Commercial/Residential: Commercial
• Department: Door Hardware
• Door Hand Direction: Non-Handed
• Door Thickness Range: 1-3/8" to 2-1/4"
• Duty Level: Heavy Duty
• Fire Rating: Yes
• Grade: Grade 1
• Keyed: Yes
• Keyed Function: Single Cylinder
• Lock Function: Office
• Lock Type: Cylindrical
• Product Attribute: Cylindrical Locks
• Product Category: Mechanical Locks
• Product Function: Office
• Product Group: Mechanical Locks
• Product Subgroup: Bored Locksets
• Product Type: Knobsets
• Series: X Series
• Standard Strike: 1-1/4" x 4-7/8", ANSI, Square curved lip corner, no box
• Subcategory: Cylindrical Locks
• UL Listing Type: UL Listed (3 Hour A Label)

Installation & Operation

1. Review manufacturer specifications and verify door preparation requirements including door thickness between 1-3/8" and 2-1/4", 2-3/4" backset, and handing as applicable to this product.
2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces.
3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions.
4. Install all mounting hardware and secure the device to door and frame per manufacturer torque specifications.
5. Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion.
6. Test device operation to verify proper function 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
• Marine Environment Applications
• Multi-Tenant Residential Properties
• Industrial and Warehouse Facilities

Why Choose Falcon Quality?

Falcon X521 cylindrical locks deliver professional-grade reliability with heavy-duty brass or cold-formed steel construction and zinc dichromate coating for superior corrosion resistance. ANSI/BHMA Grade 1 certification and UL 3-hour fire rating ensure compliance with the most demanding commercial building requirements. Backed by a 10-year limited warranty and engineered for applications where dependable security and long-term performance are essential.