1/2" SNAP-IN BLANK (Product Description)
A 1/2-inch snap-in blank is a knockout closure plug used to seal unused 1/2" openings in electrical boxes, panels, or enclosures.
Product Description
This fitting is a metal or plastic snap-in knockout blank designed to quickly close a 1/2" trade-size knockout hole in junction boxes, device boxes, or electrical panels.
It installs by simply pressing into the knockout opening, where it locks in place without the need for a locknut or tools. Once installed, it provides a safe, finished closure over unused openings in electrical enclosures.
Snap-in blanks are commonly used during rough-in and trim-out stages to maintain enclosure integrity and meet electrical safety requirements.
Manufacturers such as Crouse-Hinds and Arlington produce common versions like the steel 1/2" snap-in KO blank (e.g., Series 335 / Arlington 900).
Key Specifications
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Size: 1/2 inch knockout
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Type: Snap-in knockout blank / plug
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Material: Steel (most common) or non-metallic plastic
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Finish: Zinc-plated (steel versions)
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Mounting: Snap-in (tool-free installation)
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Application: Closes unused box/panel knockouts
Key Features
- Installs instantly by snapping into knockout
- Provides a secure closure for unused openings
- Helps maintain safety and code compliance
- Prevents dust, debris, and accidental contact with wiring
- Available in steel (durable) or plastic (non-metallic) versions
- Common low-cost finishing component in electrical work
Typical Applications
- Junction boxes
- Electrical panels and load centers
- Metal or plastic device boxes
- Closing unused conduit entry points
- Electrical punch-list finishing
