3.75-inch Round Old Work Box

3.75-inch Round Old Work Box – Ceiling Box for Electrical Installations

The 3.75-inch Round Old Work Box by Pass & Seymour is a thermoplastic ceiling and wall box designed for residential and commercial electrical applications. It features swing brackets that adjust from 1 1/4-inch down to 1/8-inch, enabling secure mounting in walls or ceilings with varying thicknesses. This box includes four Auto/Clamps for quick, tool-free cable installation and device mounting holes, making it suitable for use by electrical distributors and switchgear suppliers requiring reliable wire and cable management solutions. The box supports fixture weights up to 6 lbs when installed properly, ensuring safe and compliant lighting solutions.

Specifications

• Product Name: 3.75-inch Round Old Work Box
• Material: Noryl Thermoplastic
• Color: Black
• Application: Ceiling Box, Wall Box
• Mounting: Ceiling Mount with Swing Brackets
• Insulation: Flush
• Cubic Capacity: 18
• Number of Outlets: 1
• Product Weight: 0.2100 lb
• Country of Origin: United States
• Manufacturer: Pass & Seymour
• Manufacturer Part Number: C118WAC
• UL Listed: Yes
• Order Minimum: 50 pack

Features

• Swing brackets adjust from 1 1/4-inch down to 1/8-inch for versatile installation in walls or ceilings.
• Includes four Auto/Clamps that secure nonmetallic cable without separate clamps or tools.
• Device mounting holes included for easy attachment of electrical devices.
• Made of high-impact thermoplastic for durability and compliance.
• Supports fixture weights up to 6 lbs when installed with proper mounting screws.
• Designed to fit flush with wall or ceiling surfaces, preventing gaps between plate and surface.
• Combination slotted/Phillips head swing bracket screws for secure mounting.
• Suitable for in-wall and in-ceiling use in residential and commercial sectors.
• Made in the USA, ensuring quality and compliance.

Downloads & Links

• Plastic Boxes Installation Instructions, IS340702"
• Spec Sheet
• Wall Boxes & Floor Boxes
• Pass & Seymour - Slater¬Æ Plastic Ceiling Boxes