Yale B-AU5491LN REX 626 24V Grade 1 Electrified Lockset combines cutting-edge technology with robust design, making it ideal for industrial, commercial, and institutional applications. This fail-secure, 24V electrified cylindrical lock features the AU lever design and is SFIC prep, providing flexibility and security in various settings. Built to last, the lockset incorporates a Free Wheeling lever mechanism that enhances vandal resistance while minimizing maintenance needs. The stainless steel latchbolt offers superior strength and wear resistance, with a standard 1/2" throw and an optional 3/4" throw for fire-rated applications. The wear-resistant chassis plates ensure smooth operation and longevity, making it a reliable choice for demanding environments. This Grade 1 lockset is designed for doors ranging from 1-3/4" to 2" thick and includes three non-handed lever designs that comply with ADA requirements. With 24 functions, including electrified options, and extensive keying choices, it meets diverse security needs. The lifetime warranty on heavy-duty lever return springs prevents sagging, ensuring functional reliability. Choose the Yale B-AU5491LN REX for a high-performance locking solution that combines durability, versatility, and peace of mind.

Grade 1 Electrified Lockset

Fail Secure, 24V, Electrified Cylindrical Lock, AU Lever Design, SFIC Prep, Less Core, REX, Satin Chrome

Designed for industrial, commercial and institutional use, the Yale 5400LN Series heavy duty cylindrical lockset offers no compromises when it comes to rugged reliability and performance. With key construction features such as our Free Wheeling lever mechanism, wear resistant chassis plates, heavy duty lever return springs and through bolting, this Grade 1 trendsetter proves time and again why it's the favorite among architects and building owners who demand the highest standard of product quality.

Designed for industrial, commercial, and institutional settings.

Designed for industrial, commercial and institutional use, this heavy-duty grade 1 cylindrical lockset offers no compromise when it comes to rugged reliability and performance. 

• Free Wheeling lever mechanism increases vandal resistance and reduces the amount of maintenance typically required of locksets with rigid levers.

• 13 finish options.

• 3 lever designs.

• 24 functions including electrified.

• Stainless steel latchbolt provides added strength and wear resistance. Direct 1/2" throw is standard.

• A 3/4" latch throw for fire-rated or pairs of doors is available.

• Wear-resistant plates in the chassis help extend the life of the lockbody and provide smoother lock operation.

• Longer thread locking through-bolts through the chassis provide greater stability and prevent rotation.

• Lifetime warranted heavy-duty lever return springs prevent lever sag and provide positive return of lever to horizontal position. 

• Patented (patent no. 6,131,970) door adjustable rose support plates allow for easy adjustment of lockset to fit doors ranging in thickness from 1-3/4" to 2". Rose spacers available for 1-3/8" thick doors.

• Three non-handed lever options (Augusta, Monroe, and Pacific Beach) comply with ADA requirements for easy gripping and operation.

• Expanded cylinder and keying options: - Yale® 6- and 7-pin standard and interchangeable core cylinders including Yale® KeyMark® protected keyway cylinders. - Standard cylinders with Schlage® C and Sargent® LA keyways. Small format interchangeable cores with Best® keyways. - Levers which accept interchangeable core cylinders by Best®, Schlage®, ASSA® and Medeco®.

• 3-1/2" roses cover ANSI/BHMA hollow metal door cutout.

Resources

• 5400LN Grade 1 Cylindrical Lever Locks Cut Sheet
• 5400LN Series Grade 1 Cylindrical Lever Locks Catalog
• 5400LN Series Grade 1 Cylindrical Lever Lockset Installation Instructions
• Electrified Wiring and Request to Exit (REX) Instructions 5490LN/5491LN
• Replacing Push Button on a Yale 5400 Series Cylindrical Lock