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Schlage ND91-BD-ATH Vandlgard Entrance/Office Cylindrical Lock, Athens Lever, SFIC Prep Less Core, 2 3/4 Backset, 4 7/8" Strike, Grade 1, Non Handed
The Schlage ND91BD-ATH is a Grade 1 cylindrical lock built for high-traffic commercial openings where durability is non-negotiable. Part of the rugged ND Series, it features Schlage's Vandlgard function, which lets the outside lever rotate freely when locked to protect the internal mechanism from forced entry and abuse. This entrance/office configuration is prepped for a small format interchangeable core (SFIC) and ships less core, giving facility managers flexibility for existing keying systems. The clean Athens (ATH) lever offers a comfortable grip and ADA-compliant operation, while the non-handed design and standard 2-3/4" backset make installation straightforward on most standard door prep.
Features
- Vandlgard function protects the lock by allowing the outside lever to rotate freely when in the locked position.
- Grade 1 certified for the highest level of commercial durability and performance.
- Prepped for small format interchangeable core (SFIC) and supplied less core for keying flexibility.
- Athens (ATH) lever design provides an ergonomic, ADA-compliant feel.
- Non-handed for simplified ordering and field installation.
- Standard 2-3/4" backset with a 4-7/8" ANSI strike.
Functional Details
The ND91 entrance/office function combines everyday convenience with vandal resistance. Both levers are typically active, and the outside lever can be locked or unlocked using a key or an inside pushbutton/turn, while the Vandlgard mechanism keeps the outside lever spinning freely when locked to prevent damage from prying or twisting.
- Latchbolt operated by lever from either side except when outside lever is locked.
- Outside lever locked and unlocked by key.
- When outside lever is locked, latchbolt is retracted by key outside or by rotating inside lever.
- Inside lever always free for immediate egress.
Included Components
The lockset includes the ND Series chassis with Athens levers, latch, and the 4-7/8" ANSI strike. The unit is prepped for a small format interchangeable core but ships without a core, allowing it to be integrated into an existing keying program.
| Manufacturer | Schlage |
|---|---|
| SKU | ND91BD-ATH |
| Grade | Grade 1 |
| Origin | Made in USA |
| Unit of Measure | Each |
| UL Listing Type | UL/cUL Listed for 3-hour fire door |
| ANSI Number | ANSI/BHMA A156.2 |
| Function | Vandlgard Entrance/Office (ND91) |
| Lever Style | Athens (ATH) |
| Core Type | SFIC Prep, Less Core |
| Handing | Non-Handed |
| BAA Qualified | Yes |
| Limited Warranty | Three-year limited warranty |
| Backset | 2-3/4" |
|---|---|
| Strike | 4-7/8" ANSI strike |
| Latchbolt Throw | 1/2" |
| Door Thickness Range | 1-3/8" to 2" standard |
| Chassis Diameter | 2-1/8" cross bore |
| Faceplate | 1" x 2-1/4" |
| Cylinder Type | Small Format Interchangeable Core (6 or 7 pin) |
| Rose Diameter | 3-9/16" |
| Lever Return Type | Vandlgard free-spinning when locked |
| Fire Rating | 3-hour rated openings |
| Certification | ANSI/BHMA A156.2 Series 4000, Grade 1 |












