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BELL Knockout Seal: Steel, 3 in Conduit Hole Size, Steel, Zinc Electroplated - Electrical Enclosure Hole Seals
BELLElectrical Enclosure Hole Seals

BELL Knockout Seal: Steel, 3 in Conduit Hole Size, Steel, Zinc Electroplated

The BELL Knockout Seal is a steel electrical enclosure hole seal designed for sealing knockouts. This model, MPN 1039, features a zinc electroplated finish and includes a bolt and nut for installation. It is intended…

SKU 3G-OTH-07426

Brand
BELL
Item
Knockout Seal: Steel, 3 in Conduit Hole Size, Steel, Zinc Electroplated
Category
Electrical Enclosure Hole Seals
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Technical Specifications

BELL
Manufacturer Part Number
1039
Type
Steel, Zinc Electroplated, Bolt and Nut
Material
Steel
Finish
Zinc Electroplated
Includes
Bolt and Nut
For Hole Type
Knockouts
Conduit Hole Size
3 in
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BELL Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The BELL Knockout Seal is a steel electrical enclosure hole seal designed for sealing knockouts. This model, MPN 1039, features a zinc electroplated finish and includes a bolt and nut for installation. It is intended for use with 3-inch conduit hole sizes.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the BELL Knockout Seal used for?

The BELL Knockout Seal (MPN 1039) is used to seal unused knockouts in electrical enclosures, preventing dust, moisture, and debris ingress. It is commonly applied in industrial control panels, junction boxes, and switchgear to maintain enclosure integrity and meet safety codes.

What are the specifications of the BELL Knockout Seal?

The BELL Knockout Seal is made of steel with a zinc electroplated finish. It fits 3-inch conduit hole sizes and includes a bolt and nut for secure installation. The manufacturer part number is 1039, and it is designed for knockout-type holes in electrical enclosures.

Where to buy the BELL Knockout Seal worldwide?

3G Electric supplies the BELL Knockout Seal (MPN 1039) to customers worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time.

How to install the BELL Knockout Seal?

To install the BELL Knockout Seal, insert the bolt through the center of the seal and the knockout hole, then secure it with the included nut from inside the enclosure. Tighten firmly to create a weather-resistant seal. Always follow standard electrical safety practices and enclosure sealing guidelines.

Used in

Common applications for BELL
Hydronic heating systems — BELL & GOSSETT Series 60 circulator pump impellers (p82880) for closed-loop hot water circulation.
Commercial HVAC maintenance — BELL & GOSSETT flange hardware kits (P64910) for securing pump flanges in chiller and boiler rooms.
Industrial fluid handling — BELL & GOSSETT isolation flanges (101223LF) for isolating pumps in process piping systems.
Outdoor electrical installations — BELL weatherproof covers (5028-0) for protecting receptacles in NEMA 3R environments.
Floor box access in commercial buildings — BELL brass floor box covers (6249) for flush-mounted electrical outlets in concrete floors.
Pump repair and retrofit — BELL & GOSSETT bearing assemblies (189105LF) for in-line circulating pumps in Series PR applications.

BELL Products

3G Electric supplies BELL electrical enclosure hole seals. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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