Hi-Hatch MM II fCeiling Access Hatch

300×300, 450×450, 300×600, 600×600

Installation Location

  • Ceiling

Main Features

  • Sharply Slim Frame
  • Can after Construction
  • Can Install into Wooden Frame
  • Can 4 Directional Opening/ Closing Switch (only 300×300, 450×450, 600×600)
  • Custom-Made Size within Standard Size Available (Deformed Size Available)
  • (Corp.) Public Buildings Association Evaluating Product



  • 300×300(mm)
  • 300×600(mm)
  • 450×450(mm)
  • 600×600(mm)

Opening and Closing Part

  • Standard (Slide Lock) Type

  • Key Type (Key P201)

    Can Key Sharing with MMHⅡ, GMⅡ, SEⅡ, AS, NT, GS

Color Variation

  • Silver Color

  • White Color (Baked Coating)



Outer Frame, Inner Frame, Slide Angle/ Extruded Aluminum A6063S-T5 Anodized (Custom-Made Color Available)

Model No. / Dimensions

□300 300×600 □450 □600
Model No. Standard Type Silver HHMMⅡf-303 HHMMⅡf-3060★ HHMMⅡf-454 HHMMⅡf-606
White HHMMⅡf-303W HHMMⅡf-3060W★ HHMMⅡf-454W HHMMⅡf-606W
Key Type Silver HHMMⅡf-K303 HHMMⅡf-K3060★ HHMMⅡf-K454 HHMMⅡf-K606
White HHMMⅡf-K303W HHMMⅡf-K3060W★ HHMMⅡf-K454W HHMMⅡf-K606W
Dimensions Standard Dimensions 303×303 303×606 454×454 606×606
Ceiling Opening Dimensions 303×303 303×606 454×454 606×606
Inner Finishing Board Dimensions 288×288 288×591 439×439 591×591
Inner Backing Board Dimensions 262×262 262×565 413×413 606×606

*300 × 600 cannot switching 4 directional opening.
* ★ is made-to-order. Please contact sales department about delivery date.
*Key type white’s decorative plate and cylinder part could not to be white color.


Hanging Wire

To prevent falling inner frame by hanging the wire to inner frame and channel. Use it with spring hook attaches to (rotating axis side) the hole of inner frame.

For Square Stud Method “Z Screw”

Square stud method is construction technique using square stud differ from general construction steel-made ceiling base.

“Z screw” is NAKA Corporation’s original screw to fasten ceiling access hatch and square stud. There are some cases cannot available according to the combination of square stud method.

Custom-Made Size within Standard Size Available (Deformed Size Available)

Custom-Made Color Available



Channel Catch

Use channel catch to attach.