Schlage Residential F51A Orbit Knob Entry Lock with C Keyway Single Cylinder

Schlage Residential F51A Orbit Knob Entry Lock with C Keyway Single Cylinder

Grade 2 Residential Entry Lock with Professional Installation Features

The Schlage Residential F51A Orbit Knob Entry Lock delivers reliable residential security with Grade 2 commercial-grade performance. This single cylinder entry lock features a 5-pin C keyway cylinder, dual backset compatibility for 2-3/8" or 2-3/4" installations, and accommodates door thickness from 1-3/8" to 1-3/4". The lock includes a 1" x 2-1/4" universal latch with 1/2" throw and full lip radius strike for secure door engagement.

Professional Features & Benefits

• Door Thickness Compatibility: Accommodates 1-3/8" to 1-3/4" doors for versatile residential installation applications.
• Dual Backset Design: Universal latch fits either 2-3/8" or 2-3/4" backsets for flexible door preparation requirements.
• Grade 2 Commercial Performance: ANSI/BHMA A156.2-2017 Commercial Grade 2 and ANSI/BHMA A156.39-2015 Residential Grade AAA certification for superior durability.
• Professional Latch System: 1" x 2-1/4" latch with 1/4" radius corner faceplate, 7/8" housing diameter, and 1/2" throw for secure engagement.
• 5-Pin Security Cylinder: C keyway configuration with keyed alike (KA4) capability provides reliable key control and security.
• Fire Door Compatibility: Available UL Listed for 3-hour fire door applications (F51A function) for code compliance installations.
• Easy Installation: 3-step installation process requires only a screwdriver for convenient professional or DIY installation.
• Manufacturer Warranty: 10 Year warranty coverage for added confidence and long-term protection.

Standard Features

Certification: ANSI/BHMA A156.2-2017 Commercial Grade 2; ANSI/BHMA A156.39-2015 Residential Grade AAA; Available UL Listed for 3-hour fire door (F10, F40 (CSV Only), F51A, F80 functions).
Latch: 1"x 2-1/4", 1/4" radius corner faceplate, 7/8" housing diameter, 1/2" throw, circular drive-in included, universal latch
Strike: 1-5/8" x 2-1/4" radius corner, full lip, no box
Backset: Dual backset latches, fits either 2-3/8" or 2-3/4" backsets
Cylinder: 5-Pin, C keyway, keyed alike (KA4)
Door Range: 1-3/8" – 1-3/4"
Keys: Two per lock, 5-pin, C section

Installation & Operation

1. Review manufacturer specifications and verify door preparation requirements including door thickness between 1-3/8" and 1-3/4", and select appropriate backset (2-3/8" or 2-3/4").
2. Use manufacturer-provided templates to mark mounting hole locations accurately on door surfaces for the cylindrical lock installation.
3. Prepare door by drilling required holes per manufacturer specifications for the lock body, latch, and cylinder components.
4. Install the universal latch assembly and strike plate, ensuring proper alignment with door frame and secure mounting per manufacturer torque specifications.
5. Install the lock mechanism and adjust cylinder operation for smooth key insertion, rotation, and interior turnbutton function.
6. Test lock operation from both interior and exterior sides to verify proper keyed entry function, interior unlock operation, and secure latching. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

• Residential Entry Doors
• Single-Family Home Security
• Apartment and Condominium Units
• Townhouse and Duplex Properties
• Rental Property Management
• Home Renovation and Remodeling
• Property Development Projects

Why Choose Schlage Residential Quality?

Schlage Residential F51A entry locks deliver professional-grade reliability with zinc and steel construction rated for Grade 2 commercial performance and Residential Grade AAA standards. The 10 Year manufacturer warranty provides long-term confidence in demanding residential applications. Engineered with dual backset compatibility and universal latch design for versatile installation requirements where dependable security performance is essential.

ANSI/BHMA Grade 2 rated mechanical knob or lever with solid brass construction and SecureKey re-keyable cylinder. Support Resources: Manuals Hub: Schlage Manuals, Installation Guides & Templates (https://www.schlage.com/en/home/support/installation-manuals-templates.html) || Installation Guides: F-Series Knob and Lever Installation Instructions (https://www.schlage.com/content/dam/sch-us/documents/pdf/installation-manuals/P515-302.pdf) || Door Prep Templates: F10/F40/F51 Knob and Lever Door Prep Template (https://www.schlage.com/content/dam/sch-us/documents/pdf/installation-manuals/P513-593.pdf) || FAQs & Support: Schlage Product FAQs (https://www.schlage.com/en/home/support/faqs.html)