Ag Manufacturing 313 Steel Knockout Seal 1-1/4 in

Product Description

The AG MANUFACTURING 313 is a three-piece steel knockout seal designed for 1-1/4 inch trade-size openings. It closes unused knockouts in metallic electrical enclosures, panels, and junction boxes, preventing debris ingress and maintaining the mechanical integrity of the enclosure. Licensed electricians and panel technicians install this seal during rough-in and finish work wherever a knockout has been punched but not used. The three-piece construction allows quick field installation without additional hardware.

This knockout seal is suited for residential and light commercial electrical work where metallic enclosures require unused openings to be closed per NEC requirements. Common install locations include load centers, junction boxes, pull boxes, and other metal enclosures where open knockouts must be sealed to maintain listing compliance.

Key Features

• Fits 1-1/4 inch trade-size knockout openings
• Three-piece steel construction for secure, tool-assisted installation
• Compatible with standard metallic electrical enclosures and panels
• Closes unused knockouts to prevent debris ingress and maintain enclosure integrity

Compatibility

Designed as an OEM-style replacement and standard-fit knockout seal for metallic electrical enclosures, junction boxes, and panels with 1-1/4 inch trade-size knockouts.

Installation Notes

Installation should be performed by a licensed electrician in accordance with applicable NEC requirements for closing unused enclosure openings. De-energize the panel or enclosure and follow lockout/tagout procedures before beginning work. A screwdriver or knockout seal installation tool is typically used to seat the retaining ring. Do not install in oversized or damaged knockout openings where a secure fit cannot be achieved.

Technical Specifications

• Trade Size: 1-1/4 inch
• Material: Steel
• Piece Count: 3

Standard Information

• Brand: AG MANUFACTURING
• Manufacturer Part Number: 313