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B250 Series Grade 2 Deadlatch

Ideal for use on gates, utility panels and pipe chases, B250 Series accepts conventional and FSIC cylinders and features a thumbturn "holdback."


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The B250 operates as a deadlatch for situations where the non-handled function of a deadbolt is desired but in a self-locking form. This makes it ideal for pool gates as a double cylinder and similar applications where relocking is essential to security. When used on solid doors as a single cylinder with thumbturn, the holdback function allows the latch to remain retracted so the lock can be used as a nightlatch

 Medium Duty 

 Primus upgradeable 



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Mechanical Locks

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  • Exceeds ANSI/BHMA Grade 2 operational and security standards 
  • 9/16" throw deadlatch resists prying attacks and "shimming" of the latch    
  • Metal wood frame reinforcer uses 3" screws to anchor deep into wood door frame to protect against kick-in attacks 
  • Free spinning, tapered cylinder collar with security insert resists wrenching and prying
  • Patented Everest 29™ S123 keyway is provided standard which prohibits unauthorized key duplication 
  • Restricted geographically exclusive Primus upgraded security options offer advanced key control and exceptional physical security
  • UL 437 listed option resists drilling and physical attack on the cylinder 



  • Seven available finishes  
  • Suites with nearly all Schlage and Von Duprin products



  • Two functions as single or double cylinder options


Built to Last  

  • Every Schlage lock undergoes intensive testing to determine its ANSI grade level including: cycle, resistance, door impact, warped door and bolt strength tests

Keyed functions

Single cylinder

  • B250 Single cylinder deadlatch (night latch) - thumbturn x cylinder (ANSI E0122)

Double cylinder

  • B252 Double cylinder deadlatch - cylinder x cylinder (ANSI E0112) 


  • Trim rings: solid brass 7/16" and 1/8" each reinforced with a hardened steel security inserts 
  • Cylinder: Solid brass in a solid zinc housing
  • Dust box: wood frame reinforcer with polyproplylene dustbox and 3" screws standard


Door Thickness

  • Standard door thickness: 1-1/2" to 1-3/4" (38 mm to 44 mm) conventional cylinder; 1-1/2" to 2-1/8" (38 mm to 54 mm) FSIC cylinder                                 



  • 1" housing diameter; 9/16" throw
  • Backset: 2-3/8" (60 mm) fixed backset standard; 2-3/4" backset optional
  • Faceplate: square corner 1-1⁄8" x 2-1/4" (29 mm x 57 mm) standard
  • Strike: 1-1/8" x 2-3/4" T-strike with square corners and box standard; ANSI and round corner options available
  • Strike lip length: 1-1⁄8" (29 mm) standard; extended lip strikes up to 2" optional


  • ANSI/BHMA A156.36-2020, Grade 2 auxiliary lock 



  • UL 437 listed when using Primus high-security UL 437 cylinder 


California Fire Code 

  • Meets Building Code requirements



  • Meets BAA (Buy American Act)


B250 Series deadlatch finishes

605 Bright brass

605 Bright brass


606 Satin brass


609 Antique brass


613 Oil rubbed bronze


622 Matte black


625 Bright chrome


626 Satin chrome

Key cylinder, plug and core face finishes


606 Satin brass


522 Bronze (simulated equivalent)


626 Satin chrome

Open keyways upgradeable to Primus RP


Patented keyways upgradeable to Primus XP

  • Everest 29™ S keyways include S123 (default keyway)
  • Everest 29™ T restricted keyways 
  • Everest 29™ R restricted keyways as SL cylinders in conventional or FSIC formats with the same A2 pinning style of an SFIC cylinders
  • Everest 29™ keyways gain restricted, geography exclusivity in a Primus XP cylinder
  • Available in Conventional and FSIC cylinder formats


Master Keying

  • Factory master keying available



Product Information


Technical resources


Additional information

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Did You Know?

Carrying on the legacy of the groundbreaking push-button lock, Schlage changed the game again with its descendent in 2019—the ALX Series. This series features a patent-pending chassis and revolutionary new modular design.

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As part of Allegion’s family of pioneering brands, Schlage benefits from the strength, efficiencies, resources, and integration from a global power. In turn, we pass those advantages on to you.

Allegion helps keep people safe and secure where they live, work and visit. With more than 30 brands sold worldwide, we specialize in security around the doorway and beyond. It’s the power of one.

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