Orbit Industries KO3P-350 3-piece Knockout Seal 3.5 in

Product Description

The ORBIT INDUSTRIES KO3P-350 is a 3-piece knockout seal designed for 3.5-inch trade size knockouts in electrical enclosures, junction boxes, and conduit fittings. This seal closes unused or damaged knockout openings to maintain the integrity of the enclosure, prevent moisture and debris ingress, and satisfy code requirements for closed wiring enclosures. Electricians and electrical contractors reach for this seal during panel work, box installation, and service calls where open knockouts must be secured. The 3-piece design allows installation without full access to the back of the enclosure, making it well suited for retrofit and repair applications.

This knockout seal is used in residential and commercial electrical installations wherever a 3.5-inch trade size knockout is left open or has been damaged. Common applications include load centers, junction boxes, pull boxes, and other metallic or non-metallic wiring enclosures. It is a standard maintenance and rough-in item carried by electricians and electrical contractors for code-compliant closeout of unused conduit entry points.

Key Features

• 3-piece construction allows installation without rear access to the enclosure
• Sized for 3.5-inch trade size knockout openings
• Closes unused or damaged knockouts to meet NEC enclosure requirements
• Suitable for retrofit, repair, and new installation scenarios

Compatibility

Designed as an OEM-style replacement seal for 3.5-inch trade size knockout openings in standard residential and commercial electrical enclosures and junction boxes.

Installation Notes

Installation is performed by a licensed electrician. De-energize the panel or enclosure and verify the absence of voltage before opening any electrical enclosure. The 3-piece design seats into the knockout opening from the front face of the enclosure without requiring access to the rear. Work must comply with the applicable edition of the NEC and any local amendments.

Technical Specifications

• Trade Size: 3.5 inches
• Pieces: 3
• UPC: 835243049321

Standard Information

• Brand: ORBIT INDUSTRIES
• Manufacturer Part Number: KO3P-350