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DOTTIE D20S knockout seal carbon steel box

L.H. DOTTIE

L.H. DOTTIE D20S Knockout Seal Carbon Steel Box

SKU CH-HQ9G-HMQMC

Carbon steel knockout seal fits 20 mm conduit openings in electrical boxes

  • Carbon steel construction resists corrosion for long service life
  • Knockout seal design closes unused openings securely
  • DOTTIE brand quality trusted by trade professionals
  • Box packaging keeps seals organised on the job site
  • New condition ensures reliable performance from first use

Knockout seal for conduit systems

The L.H. DOTTIE D20S knockout seal is a carbon steel fitting designed to close unused openings in electrical enclosures or junction boxes. It suits electricians and maintenance crews who need a secure, code-compliant closure during installation or retrofit work.

Carbon steel withstands job-site conditions

The carbon steel construction resists mechanical stress and environmental exposure typical of commercial and industrial wiring projects. The seal installs without specialised tools and maintains a tight fit without ongoing maintenance or adjustment.

Box packaging simplifies inventory management

Supplied in a box, the seals stay organised and protected until needed, reducing lost parts on busy sites. The bulk format supports crews who run multiple conduit runs and prefer to keep a ready stock of standard-size closures.

Highlights

  • Carbon steel construction resists corrosion for long service life
  • Knockout seal design closes unused openings securely
  • DOTTIE brand quality trusted by trade professionals
  • Box packaging keeps seals organised on the job site
  • New condition ensures reliable performance from first use

Specifications

BrandDOTTIE

Questions about this item

How is the D20S knockout seal installed in a carbon steel box and what step do people often miss?

Press the seal firmly into the 20 mm knockout opening until the flange seats flat against the box wall; the step often missed is removing burrs from the hole edge so the seal sits evenly.

What maintenance or replacement will the D20S knockout seal need over time?

Inspect the carbon steel seal periodically for rust or deformation; replace it if corrosion appears or if the seal no longer closes the 20 mm opening tightly.

What limit appears first on the D20S knockout seal under sustained vibration or pressure?

The carbon steel flange can fatigue at the 20 mm edge, leading to a loss of seal integrity before the material itself yields.

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