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Boxes and Fittings

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  • 2-1/2" Screw Type Knockout Seal
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    2-1/2" Screw Type Knockout Seal

    GI-KOS-250
    $4.60
    MSRP: $12.29
    Garvin Industries' 2-1/2" Screw Type Knockout Seal is designed to effectively seal off unused knockout holes in electrical boxes, ensuring safety and maintaining the integrity of the box. This knockout seal is easy to install and provides a reliable...
    Qty in Cart: 0
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    Price:
    $4.60
    MSRP: $12.29
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  • Garvin Industries 2-1/2" Screw Type Oil Tight Knockout Seal
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    Garvin Industries 2-1/2" Screw Type Oil Tight Knockout Seal

    GI-KOS-250-OT
    $19.30
    MSRP: $56.21
    Garvin Industries presents the 2-1/2" Screw Type Oil Tight Knockout Seal, designed for secure and reliable sealing of knockout holes in electrical boxes and enclosures. This knockout seal effectively prevents oil, dust, and other contaminants from...
    Qty in Cart: 0
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    $19.30
    MSRP: $56.21
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  • 2" Screw Type Knockout Seal, Steel
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    2" Screw Type Knockout Seal, Steel

    GI-KOS-200
    $3.90
    MSRP: $9.99
    The Garvin Industries KOS-200 is a robust 2" Screw Type Knockout Seal made from high-quality steel, designed to cover exposed knockout holes in electrical boxes. This seal is essential for maintaining safety and ensuring that electrical boxes meet code...
    Qty in Cart: 0
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    $3.90
    MSRP: $9.99
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  • 2" Screw Type Oil Tight Knockout Seal, Stainless Steel
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    2" Screw Type Oil Tight Knockout Seal, Stainless Steel

    GI-KOS-200-OTSS
    $45.90
    MSRP: $134.52
    This 2" Screw Type Oil Tight Knockout Seal from Garvin Industries is crafted from durable stainless steel, ensuring long-lasting performance and reliability in various industrial settings. The seal is specifically designed to provide a secure, oil-tight...
    Qty in Cart: 0
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    Price:
    $45.90
    MSRP: $134.52
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  • 3" Screw Type Oil Tight Knockout Seal, Stainless Steel
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    3" Screw Type Oil Tight Knockout Seal, Stainless Steel

    GI-KOS-300-OTSS
    $96.40
    MSRP: $172.32
    The Garvin Industries KOS-300-OTSS is a 3" screw type oil tight knockout seal crafted from high-quality stainless steel, designed to provide secure and durable sealing in electrical enclosures and panels.Key Features and BenefitsEasy-to-install screw...
    Qty in Cart: 0
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    Price:
    $96.40
    MSRP: $172.32
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  • 3-1/2" Screw Type Oil Tight Knockout Seal
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    3-1/2" Screw Type Oil Tight Knockout Seal

    GI-KOS-350-OT
    $29.65
    MSRP: $69.49
    The Garvin Industries KOS-350-OT is a robust 3-1/2" screw type knockout seal designed specifically for providing a durable, oil tight seal over unused knockout holes. This product is part of Garvin Industries' reliable range of electrical accessories,...
    Qty in Cart: 0
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    $29.65
    MSRP: $69.49
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  • 3-1/2" Screw Type Plenum Knockout Seal
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    3-1/2" Screw Type Plenum Knockout Seal

    GI-KOS-350-VT
    $36.05
    MSRP: $105.37
    The Garvin Industries KOS-350-VT is a 3-1/2" screw type plenum knockout seal, ideal for securely sealing off unused knockouts in electrical boxes and enclosures. This product ensures compliance with safety codes and maintains the integrity of the...
    Qty in Cart: 0
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    Price:
    $36.05
    MSRP: $105.37
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  • 3-1/2" Screw Type Knockout Seal, Zinc Plated Steel
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    3-1/2" Screw Type Knockout Seal, Zinc Plated Steel

    GI-KOS-350
    $8.10
    MSRP: $23.13
    The Garvin Industries KOS-350 is a robust 3-1/2" screw type knockout seal crafted from zinc plated steel, designed to securely seal knockout holes in electrical boxes and enclosures. This ensures protection against environmental elements and maintains...
    Qty in Cart: 0
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    $8.10
    MSRP: $23.13
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  • 3" Screw Type Plenum Knockout Seal, Vapor Tight
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    3" Screw Type Plenum Knockout Seal, Vapor Tight

    GI-KOS-300-VT
    $24.75
    MSRP: $72.79
    The Garvin Industries KOS-300-VT is a robust 3" screw type plenum knockout seal that provides a vapor tight closure, ensuring effective sealing in diverse environments. This product is particularly designed for use in plenums where maintaining an...
    Qty in Cart: 0
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    $24.75
    MSRP: $72.79
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  • 4" Screw/Bar Type Knockout Seal
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    4" Screw/Bar Type Knockout Seal

    GI-KOS-400
    $10.70
    MSRP: $27.18
    Garvin Industries' 4" Screw/Bar Type Knockout Seal is designed for use in steel electrical boxes to cover unused knockout holes. This product is vital in preventing dust, debris, and insects from entering the electrical boxes, maintaining the integrity...
    Qty in Cart: 0
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    $10.70
    MSRP: $27.18
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  • 4" Screw Type Oil Tight Knockout Seal
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    4" Screw Type Oil Tight Knockout Seal

    GI-KOS-400-OT
    $40.35
    MSRP: $87.10
    The Garvin Industries KOS-400-OT is a 4" screw type oil tight knockout seal, ideal for providing a robust solution in securing electrical enclosures and panels. This product ensures a tight fit and prevents dirt, dust, and moisture from entering the...
    Qty in Cart: 0
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    $40.35
    MSRP: $87.10
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  • 4" Screw Type Oil Tight Knockout Seal, Stainless Steel
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    4" Screw Type Oil Tight Knockout Seal, Stainless Steel

    GI-KOS-400-OTSS
    $144.80
    MSRP: $262.63
    The Garvin Industries KOS-400-OTSS 4" Screw Type Oil Tight Knockout Seal is crafted from high-quality stainless steel, designed to provide a secure, oil-tight seal in electrical boxes and enclosures. This product is part of Garvin Industries' reliable...
    Qty in Cart: 0
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    $144.80
    MSRP: $262.63
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  • 4" Screw Type Plenum Knockout Seal
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    4" Screw Type Plenum Knockout Seal

    GI-KOS-400-VT
    $43.15
    MSRP: $124.93
    The Garvin Industries KOS-400-VT is a 4" screw type plenum knockout seal, meticulously engineered for secure installations in plenum spaces. This product is part of the essential accessories lineup by Garvin Industries, known for their reliable and...
    Qty in Cart: 0
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    $43.15
    MSRP: $124.93
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  • 5" Screw Type Plenum Knockout Seal
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    5" Screw Type Plenum Knockout Seal

    GI-KOS-500-VT
    $52.95
    MSRP: $140.03
    This 5" Screw Type Plenum Knockout Seal from Garvin Industries is designed for effectively sealing knockout openings in plenum spaces. The KOS-500-VT model ensures a tight and secure fit, preventing air leakage and maintaining the integrity of the...
    Qty in Cart: 0
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    $52.95
    MSRP: $140.03
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  • 1/2" Screw Type Knockout Seal
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    1/2" Screw Type Knockout Seal

    GI-KOS-50
    $0.85
    MSRP: $2.25
    The Garvin Industries KOS-50 is a 1/2" Screw Type Knockout Seal, an essential component for maintaining the integrity and safety of electrical enclosures. By securely sealing knockout holes, it prevents dust, debris, and insects from entering, thus...
    Qty in Cart: 0
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    $0.85
    MSRP: $2.25
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  • 6" Screw Type Knockout Seal
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    6" Screw Type Knockout Seal

    GI-KOS-600
    $48.05
    MSRP: $116.94
    The Garvin Industries KOS-600 is a 6" Screw Type Knockout Seal, ideal for securely sealing knockout holes in electrical boxes and enclosures. This product is part of Garvin's reliable and efficient solutions for electrical installations.Key Features and...
    Qty in Cart: 0
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    $48.05
    MSRP: $116.94
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  • 1/2" Screw Type Oil Tight Knockout Seal
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    1/2" Screw Type Oil Tight Knockout Seal

    GI-KOS-50-OT
    $7.40
    MSRP: $17.68
    This 1/2" Screw Type Oil Tight Knockout Seal from Garvin Industries is designed to secure openings in electrical boxes or enclosures, maintaining an oil-tight seal that protects against environmental contaminants.Key Features and BenefitsEnsures a tight...
    Qty in Cart: 0
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    $7.40
    MSRP: $17.68
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  • 1/2" Screw Type Oil Tight Knockout Seal, Stainless Steel
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    1/2" Screw Type Oil Tight Knockout Seal, Stainless Steel

    GI-KOS-50-OTSS
    $22.95
    MSRP: $41.04
    This 1/2" Screw Type Oil Tight Knockout Seal from Garvin Industries is crafted from high-quality stainless steel, designed to withstand harsh environmental conditions while providing a secure, oil-tight seal in electrical boxes and enclosures.Key...
    Qty in Cart: 0
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    Price:
    $22.95
    MSRP: $41.04
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  • 1/2" Screw Type Plenum Knockout Seal
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    1/2" Screw Type Plenum Knockout Seal

    GI-KOS-50-VT
    $0.30
    MSRP: $16.72
    The Garvin Industries KOS-50-VT is a 1/2" Screw Type Plenum Knockout Seal, ideal for securely closing unused knockouts in plenums and ducts. This product ensures compliance with safety codes and enhances the overall integrity of installations.Key...
    Qty in Cart: 0
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    $0.30
    MSRP: $16.72
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  • 6" Screw Type Plenum Knockout Seal, Zinc Plated Steel
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    6" Screw Type Plenum Knockout Seal, Zinc Plated Steel

    GI-KOS-600-VT
    $58.25
    MSRP: $272.19
    The Garvin Industries KOS-600-VT is a 6-inch screw type plenum knockout seal, crafted from durable zinc plated steel. This product is essential for effectively sealing off unused knockouts in plenum spaces, enhancing safety and maintaining...
    Qty in Cart: 0
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    $58.25
    MSRP: $272.19
    Subtotal:
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Adding your products to cart

Electrical boxes and fittings are foundational components in any commercial, industrial, or residential wiring installation. The box provides the structural housing for wiring connections and device mounting, while fittings secure conduit runs and manage cable entry points. Selecting the right box type for the application is critical for code compliance, installation efficiency, and long-term reliability.

Metallic boxes in square, round, octagonal, and masonry configurations are the standard choice for commercial and industrial work, where conduit systems and larger conductors are the norm. Square boxes are the most versatile format, used throughout commercial conduit systems as device, junction, and pull boxes. Round and octagonal boxes handle ceiling outlet and fixture mounting applications. Masonry boxes serve concrete block, brick, and poured concrete wall assemblies where no stud cavity exists.

Plastic boxes are widely used in residential and light commercial new construction where nonmetallic sheathed cable is the primary wiring method. Their lightweight construction and integrated cable clamp designs speed up rough-in in typical stud-wall applications.

Weatherproof boxes and in-use covers are required for any outdoor or damp-location installation, from exterior receptacles on commercial buildings to parking lot and landscape device locations. Floor boxes bring power and data access to open office floor plates without exposed conduit runs.

Ceiling fan support boxes provide the rated mounting structure required wherever a fan is installed. Panel and breaker accessories, and raceway support hardware round out this category for commercial electrical projects from rough-in through finish.

Browse by type: Metallic Boxes and Accessories, Plastic Boxes, Weatherproof Boxes and In-Use Covers, and Floor Boxes. For switches, outlets, and sensors, visit Controls and Devices.