SEPCO SS50 Series Zinc-Plated Steel Flat Knockout Seal for Electrical Enclosures

SEPCO SS50 Series Zinc-Plated Steel Flat Knockout Seal for Electrical Enclosures

The SEPCO SS50 Series Flat Knockout Seal closes unused knockout openings in electrical panels, enclosures, junction boxes, and cabinets, restoring a clean, finished surface after conduit runs, fittings, or equipment are removed or relocated. Constructed from zinc-plated steel, this flat knockout seal resists corrosion while sitting flush against the enclosure wall for a low-profile fit, and the SS50 Series is available across 1/2" through 2" trade sizes to fit standard knockout openings. Rather than leaving an open knockout exposed, the SS50 gives electrical contractors, panel shops, and facility maintenance teams a simple, purpose-built way to keep enclosures properly closed and code-conscious.

Key Features

• Trade Size Range: Available in 1/2", 3/4", 1", 1-1/2", and 2" sizes to fit standard electrical knockout openings.
• Durable Construction: Zinc-plated steel base resists corrosion and holds up to everyday panel, cabinet, and enclosure environments.
• Flat, Low-Profile Design: Sits flush against the enclosure wall for a clean, finished appearance with no protruding hardware.
• Knockout Seal Function: Closes unused knockout openings left in electrical boxes, panels, and enclosures after conduit or fitting changes.
• SS50 Series Designation: Identified under the SEPCO SS50 series for straightforward specification and reordering across sizes.
• Steel Base Strength: Steel construction provides the strength needed to stay seated in the knockout opening over time.
• Clean, Finished Appearance: Eliminates open, unsealed knockouts for a neater, more professional-looking panel or enclosure.

Technical Specifications

• Trade Size: 1/2" - 2"

Typical Applications

• Electrical Panels and Enclosures
• Junction and Pull Boxes
• Panelboards and Load Centers
• Cabinet and Equipment Enclosures
• Knockout Opening Closure and Finishing
• New Construction and Renovation Projects

Why SEPCO?

SEPCO manufactures the SS50 Series Knockout Seal from zinc-plated steel, spanning 1/2" through 2" trade sizes, to give electrical professionals a dependable way to close out unused knockouts instead of leaving enclosures exposed. The flat, low-profile design and corrosion-resistant zinc plating are built to keep panels, junction boxes, and cabinets looking clean and finished over the long term. Shop SEPCO electrical hardware at ZenSupply for straightforward, reliable components that help finish installations right.