Hubbell 5270-0 3/4 Inch Weatherproof Box Plug 4pk

Product Description

The HUBBELL 5270-0 is a 3/4-inch knockout plug designed to seal unused openings in weatherproof electrical boxes. These plugs block moisture, dust, and debris from entering enclosures where a conduit or fitting is not installed. They are a standard consumable item on any electrical service job where weatherproof boxes are used. Electricians install them during new construction, retrofit, and maintenance work to keep enclosures code-compliant and protected from the elements. This pack includes 4 plugs, making it practical for multi-box installations or to keep stock on the truck.

This plug is suited for residential and light commercial electrical installations wherever a 3/4-inch knockout in a weatherproof box needs to be sealed. Common applications include outdoor receptacle boxes, junction boxes, and service enclosures mounted on exterior walls or in wet or damp locations. The 4-piece pack supports installations where multiple unused knockouts need to be closed off at once.

Key Features

• Fits 3/4-inch knockouts in weatherproof electrical boxes
• Seals unused openings against moisture, dust, and debris ingress
• Pack of 4 plugs per package
• Designed for wet and damp location enclosures

Compatibility

Designed as an OEM-style replacement plug for standard 3/4-inch knockout openings in weatherproof electrical boxes and enclosures.

Installation Notes

Installation is performed by a licensed electrician in accordance with NEC requirements for wet and damp location enclosures. De-energize the circuit and verify power is off before opening any electrical box. Press or thread the plug firmly into the knockout opening to ensure a secure, weathertight fit. Inspect the seal after installation to confirm no gaps remain around the plug perimeter.

Technical Specifications

• Knockout Size: 3/4 inches
• Package Quantity: 4
• Application: Weatherproof electrical box

Standard Information

• Brand: HUBBELL
• Manufacturer Part Number: 5270-0