Detex Newsletter

F90KR/90KR Key Removable Mullions 


F90KR Mullion

The Detex Key Removable Mullions are very durable, low-cost mullions designed for use with rim exit devices on standard and fire-rated pairs of doors. The unique design of the latching head allows the mullion to be removed in seconds with one key turn, and then to be snapped back into place without needing the key.

  • Easy retrofit application
  • Simple, user-friendly operation
  • Provides years of trouble-free service and operation 
  • Easy installation, no drilling of the mullion tube
  • Can be cut to fit most any size application (10' and smaller)
  • Standard primer gray coating allows for easy field painting
  • Easily adapted to any double door application
  • Locking head mounts to the frame, not the mullion itself 
  • Cylinder located inside the building to prevent tampering (cylinder sold separately)
  • Designed for heavy-duty use on standard and fire-rated pairs of doors
  • Small profile base plate prevents interference when moving objects through doorway


Key Removable Mullion Catalog Page

Key Removable Mullion Installation Video


90KR....................................Starting at $616.00 list price

F90KR..................................$716.00 list price





Tech Tip     


Replacement parts for the Detex Key Removable Mullion are available.



90KR Parts List:

  • 100215K - Housing, Rim Cylinder
  • 100223-1 - Hardware Kit
  • 100213-X - Post, Mullion
  • 100222-1 Top Fitting
F90KR Parts List:
  • 100215K - Housing, Rim Cylinder
  • 100223 - Hardware Kit
  • 100213-X - Post, Mullion
  • 100222 - Top Fitting

Key Removable Mullion Installation Video

Key Removable Mullion Installation Instructions


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For more application questions, call:

Detex technical support at 800-729-3839, ext. 2.

Contact Detex Sales at 1-800-729-3839 or your local representative for more information



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