Fiberglass Plugs | McMaster-Carr

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Knockout Diameter

7/8" to 1 9/32"

1 3/8" to 1 3/4"

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C-UL Recognized Component

UL Recognized Component

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Chemical Resistant

Corrosion Resistant

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REACH

Specifications Met

For Use With

Acetic Acid (White Vinegar) (75% Concentration)

Calcium Chloride

Hydrochloric Acid (37% Concentration)

Nitric Acid (10% Concentration)

Phosphoric Acid

Salt Water (30% Concentration)

Sodium Hydroxide (Caustic Soda) (50% Concentration)

Sulfuric Acid (70% Concentration)

Export Control Classification Number (ECCN)

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How can we improve?

16 Products

Electrical Enclosure Plugs

Watertight Knockout Plugs for Enclosures

Watertight Knockout Plugs for Enclosures

Don't let water sneak into unused conduit knockouts

Other Products

Electrical Enclosure Drain Vents

Electrical Enclosure Drain Vents

Prevent moisture from getting trapped inside enclosures while letting air flow through

Pipe Flanges

Create an access point in a line by bolting two same-size flanges together with a gasket

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)