Unlock Free shipping on qualifying orders over $99. Just 

HomElectrical.com Wholesale Electrical, HVAC & Lighting Supplies for Pros

Morris 1/2-in Steel Snap-In Knockout Blank for Electrical Boxes

Morris 21800
SKU MRS-21800
Morris' 1/2-in Steel Snap-In Blank closes unused openings in electrical boxes and panel boards with a simple tool-free snap fit. All-steel construction. Add to your order at HomElectrical!
Morris 1/2-in Steel Snap-In Knockout Blank for Electrical Boxes

Image may not depict product actual color, inclusions or accessories

Morris' 1/2-in Steel Snap-In Blank closes unused openings in electrical boxes and panel boards with a simple tool-free snap fit. All-steel construction. Add to your order at HomElectrical!
  • Trade Size: 1/2-in.
  • For use in closing off unused openings in electrical boxes and panel boards.
  • All-steel construction provides durable installation integrity.
  • Snap-fit design requires no tools for quick installation.
  • Provides a clean, finished appearance on any electrical enclosure.
  • Dimensions: 1.08-in A x 0.29-in B.

Morris 21800 Description

  • Trade Size: 1/2-in.
  • For use in closing off unused openings in electrical boxes and panel boards.
  • All-steel construction provides durable installation integrity.
  • Snap-fit design requires no tools for quick installation.
  • Provides a clean, finished appearance on any electrical enclosure.
  • Dimensions: 1.08-in A x 0.29-in B.
Get FREE shipping on eligible order of $99+
Free Shipping Eligible
$0.22Each
In Stock-

Ships between 06/15/2026 - 06/16/2026

Product Specifications

Part Number21800
Color / FinishSilver
MaterialSteel
Product Dimensions1.08-in X 1.08-in X 0.29-in
Weight0.02-lb
UPC601986217996

Manufacturer Description

1/2"Snap In Blank Knockout

Resources & Download

A PDF viewer is required to view this product's information. Download Adobe Acrobat Viewer

Prop65
Important PROP 65 InformationWarning: This product can expose you to chemicals, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov. to CA residents.
Morris' 1/2-in Steel Snap-In Blank closes unused openings in electrical boxes and panel boards with a simple tool-free snap fit. All-steel construction. Add to your order at HomElectrical!
Morris 1/2-in Steel Snap-In Knockout Blank for Electrical Boxes
Get FREE shipping on eligible order of $99+
Free Shipping Eligible
$0.22Each
In Stock-

Ships between 06/15/2026 - 06/16/2026

Morris 21800 Description

  • Trade Size: 1/2-in.
  • For use in closing off unused openings in electrical boxes and panel boards.
  • All-steel construction provides durable installation integrity.
  • Snap-fit design requires no tools for quick installation.
  • Provides a clean, finished appearance on any electrical enclosure.
  • Dimensions: 1.08-in A x 0.29-in B.

Product Specifications

Part Number21800
Color / FinishSilver
MaterialSteel
Product Dimensions1.08-in X 1.08-in X 0.29-in
Weight0.02-lb
UPC601986217996

Manufacturer Description

1/2"Snap In Blank Knockout

Resources & Download

A PDF viewer is required to view this product's information. Download Adobe Acrobat Viewer

Prop65
Important PROP 65 InformationWarning: This product can expose you to chemicals, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov. to CA residents.

Product Questions & Answers

Customer Reviews

Your voice matters. Be the first to leave a review and help other pros shop smarter