McMaster-Carr logo
    Filter by
    Panel Material
    System of Measurement
    For Cutout Diameter
    Overall Diameter
    Mounting Location
    Cutout Width
    Frame Material
    Mount Type
    Overall Width
    Door Type
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    DFARS Specialty Metals
    Color
    Panel Thickness
    Frame Thickness
    Seal Material
    Latch Type
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    12 Products

    Access Ports for Insulated Pipes

    These flexible ports are often used to inspect insulated pipes and tanks for corrosion. Their frame has locking ridges to secure it in insulation that is at least 3/4" thick; no mounting screws or caulk needed. The panel fits snugly into the frame for a watertight seal. Panel opening is up to 1 1/4" smaller than the cutout.
    Pipe and Tank Mount
    Image of Product. Front orientation. Access Panels. Access Ports for Insulated Pipes.
    For
    Cutout
    Dia.
    Dp.
    Overall
    Dia.
    Color
    Panel Lock
    Type
    Temp. Range,
    ° F
    Opens
    With
    Features
    Mount
    Type
    Mounting
    Profile
    Shape
    Each
    Silicone Rubber Panel and Frame
    1 1/2"3/4"2 3/8"GrayNonlocking-130 to 500HandleLocking RidgesPush InRecessedRound7522A11100000
    2 1/2"3/4"3 3/8"GrayNonlocking-130 to 500HandleLocking RidgesPush InRecessedRound7522A2500000
    3 1/2"3/4"4 3/8"GrayNonlocking-130 to 500HandleLocking RidgesPush InRecessedRound7522A11200000
    5"3/4"5 7/8"GrayNonlocking-130 to 500HandleLocking RidgesPush InRecessedRound7522A5500000
     

    Weld-On Sights

    Weld these sights to single-wall tanks. They’re often used to monitor contents in process vessels, mixers, and bulk containers.
    304 Stainless Steel with Glass Window
    Image of Product. Front orientation. Sights. Weld-On Sights, 304 Stainless Steel with Glass Window, With Bolt-On Window.
    Image of Product. With Bolt-On Window (Unassembled). Front orientation. Exploded view. Sights. Weld-On Sights, 304 Stainless Steel with Glass Window, With Bolt-On Window.

    With Bolt-On

    Window

    With Bolt-On Window

    (Unassembled)

    With Bolt-On Window—Sights with a bolt-on window should be welded to a hole in your tank wall.
    For Hole
    Dia.
    OD
    Window
    Dia.
    Max. Pressure
    @ Temp.
    Temp. Range,
    ° F
    For Use With
    Seal Material
    Each
     
    With Bolt-On Window
    4 11/16"5"3 1/2"60 psi @ 70° F-40 to 300Water, Hydraulic FluidSilicone Rubber
    		4201K320000000
     
    316L Stainless Steel with Glass Window
    Image of Product. With Screw-Together Window (Unassembled). Front orientation. Sights. Weld-On Sights, 316L Stainless Steel with Glass Window, With Screw-Together Window.
    Image of Product. Front orientation. Sights. Weld-On Sights, 316L Stainless Steel with Glass Window, With Screw-Together Window.

    With Screw-Together

    Window (Unassembled)

    With

    Screw-Together

    Window

    316L stainless steel sights are more corrosion resistant than 304 stainless steel sights.
    With Screw-Together Window—Sights with a screw-together window make it easier to access your tank and clean the window than sights with a bolt-on window. To install these sights, place the body in a hole on your tank wall and weld it. Then twist on the window and tighten with a spanner wrench.
    DIN 11851—DIN 11851 rated sights meet dairy fitting standards.
    For Hole
    Dia.
    OD
    Window
    Dia.
    Max. Pressure
    @ Temp.
    Temp. Range,
    ° F
    For Use With
    Seal Material
    Specs.
    Met
    Each
     
    With Screw-Together Window
    2"3 5/8"2"150 psi @ 70° F-20 to 390Water, Hydraulic Fluid, Compressed AirSilicone Rubber
    		DIN 118514814K540000000
    2 1/2"4 7/16"2 1/2"150 psi @ 70° F-20 to 390Water, Hydraulic Fluid, Compressed AirSilicone Rubber
    		DIN 118514814K55000000
    3 1/8"5"3 1/8"150 psi @ 70° F-20 to 390Water, Hydraulic Fluid, Compressed AirSilicone Rubber
    		DIN 118514814K56000000
    4"5 13/16"4"150 psi @ 70° F-20 to 390Water, Hydraulic Fluid, Compressed AirSilicone Rubber
    		DIN 118514814K57000000
    5"7"5"90 psi @ 70° F-20 to 390Water, Hydraulic Fluid, Compressed AirSilicone Rubber
    		DIN 118514814K5800000000
     

    Tank and Hopper Access Panels

    Use these rectangular panels to access and inspect the interior of tanks and hoppers. All have gaskets to shut out dust and moisture. They also have a padlockable hasp that accepts up to a 5/16" dia. shackle. The panel opening is the same size as the cutout.
    Surface and Tank Mount
    Image of Product. Rectangular Panel, Screen Sold Separately. Bottom orientation. Access Panels. Tank and Hopper Access Panels.

    Rectangular Panel, Screen

    Sold Separately

    For
    Cutout
    Overall
    Ht.
    Wd.
    Lg.
    Wd.
    Dp.
    Panel
    Thk.
    Frame
    Thk.
    Seal Material
    Panel Lock
    Type
    Temp. Range,
    ° F
    Latch
    Type
    Opens
    With
    Padlock
    Included
    Mount
    Type
    Shape
    Each
    Steel Panel and Frame
    19 3/4"29 1/2"24 1/2"34 1/4"3 1/4"0.141"0.25"Silicone Rubber
    		Padlockable-80 to 550HaspHandleNoWeld OnRectangle10605A101000000000
    25 1/2"39 1/4"30 1/4"44"3 1/4"0.141"0.25"Silicone Rubber
    		Padlockable-80 to 550HaspHandleNoWeld OnRectangle10605A10200000000
     
    back to top