WB BP 350 Series

Hidden Flange Access Doors

Sizes & Specifications

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Williams Brothers - WB BP 350 Series Hidden Flange Access Panel / Door

Modern, Attractive Access Door is Ideally Suited for Apartments, Condominiums and Office Buildings!

The WB BP 350 Series Hidden Flange Access Door is a cost-effective, general purpose flush access panel for wall and ceiling installation is perfect for applications in high luxury areas such as condominiums, hotels, lobbies, and other areas where a modern and aesthetic appearance is desired. Featuring 20 gauge galvanized steel construction with a white baked, paintable enamel finish, door is suitable for installation in drywall, plaster, masonry, tile or any flush surface. Without the need to mud or tape over flanges, this door not only provides a hidden flange appearance, but it also saves money on labor as this door overlaps the return frame.


  • Door: 16 Gauge Steel with Beveled Edge
  • Frame & Trim: 16 Gauge Steel, 1-1/2″ Wide Flange
  • Finish: Baked White Enamel, Paintable Surface
  • Latches: Flush, Stainless Steel Cam Latch (opens with screwdriver)
  • Hinges: Fully-concealed Hinge
  • Applications: Walls, Ceilings


  • Locks: WB Cylinder Lock (Keyed alike with 2 keys per lock)


The WB BP 350 metal access panel comes standard in sizes 8×8, 12×12, 14×14, 16×16, 20×20, and 24×24. Door features a fully-concealed hinge, stainless steel cam latches to prevent rust, and a hidden flange. Options include locks.

Manufactured for The Williams Brothers Corporation of America. MADE IN USA.