Mulberry 30294 1-Inch Gray Die...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$0.59
Mulberry 30294 1-Inch Gray Die-Cast Zinc Round Threaded Slotted Closure Plug

Mulberry 30294 1-Inch Gray Die-Cast Zinc Round Threaded Slotted Closure Plug

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Model: 30294

In Stock (leaves warehouse same day if ordered before 3pm ET)

$0.59
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Mulberry 30294 1-Inch Gray Die-Cast Zinc Round Threaded Slotted Closure Plug

The Mulberry 30294 is a 1-Inch Gray Die-Cast Zinc Round Threaded Slotted Closure Plug engineered to seal unused threaded openings in conduit runs, junction boxes, and electrical enclosures. Manufactured from rugged die-cast zinc with a gray finish, this closure plug combines a round threaded body with a slotted head for straightforward installation using a standard flat-blade screwdriver. Electricians and contractors rely on closure plugs like the Mulberry 30294 to keep unused knockouts and threaded ports free of dust, debris, and moisture intrusion, helping maintain a clean and code-compliant electrical system. The 1-Inch trade size threads securely into matching tapped openings, providing a tight, dependable seal without the need for specialized tools.

Key Features

  • Trade Size: 1-Inch threaded opening sized for standard conduit hubs, knockouts, and enclosure ports.
  • Durable Construction: Gray die-cast zinc body offers rugged, long-lasting performance for everyday electrical installation work.
  • Round Threaded Design: Threads directly into a matching 1-Inch tapped opening to create a secure, tight-fitting mechanical seal.
  • Slotted Head: Slotted drive enables fast, tool-assisted installation and removal with a standard flat-blade screwdriver, simplifying field work.
  • Gray Finish: Gray die-cast zinc finish provides a clean, consistent appearance that matches common electrical enclosure and conduit system finishes.
  • Closure Function: Effectively closes off unused threaded openings to help keep dust, debris, and pests out of conduit systems and enclosures.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Sealing Unused Threaded Conduit and Enclosure Openings
  • Conduit and Raceway Systems
  • Electrical Panel and Junction Box Closures
  • Commercial and Industrial Electrical Installations
  • New Construction, Retrofit, and Maintenance Projects

Why Mulberry?

Mulberry's 30294 closure plug is built from durable gray die-cast zinc to deliver dependable, long-term performance in demanding electrical environments. The round threaded, slotted design ensures a secure fit and simple, tool-assisted installation, making it a practical choice for electricians and contractors who need a reliable way to close off unused 1-Inch threaded openings in conduit and enclosure systems. Choose Mulberry for consistent quality and durable construction in professional electrical installation work.

Manufacturer Resources

Mulberry Full Line Catalog

Product Specs

list_batch:
MUL-20260919
Product Type:
Closure Plug
Connection Type:
Threaded
Department:
Electrical
Product Subgroup:
Weatherproof Covers
Product Material:
Zinc Die-Cast
Product Color:
Gray
Product Size:
1-Inch
Product Group:
Wiring Devices

Mulberry 30294 – Frequently Asked Questions

1) Will the Mulberry 30294 closure plug thread into a 1-inch knockout, or does the opening have to be tapped?
The 30294 is a round threaded plug in 1-inch trade size, so it needs a matching tapped 1-inch opening, a conduit hub, or a threaded enclosure port. A plain punched knockout with no threads will not hold it; for that you want a snap-in or locknut-style seal instead.
2) What is the closest alternative to the Mulberry 30294 closure plug if Mulberry is not the specified brand?
The Pass & Seymour WPBP series weatherproof closure plug is the nearest counterpart. Both are gray closure plugs used to seal unused openings on weatherproof wiring device covers and enclosures. The Mulberry 30294 is a 1-inch threaded zinc die-cast plug with a slotted head driven by a flat-blade screwdriver, so when the opening in hand is a 1-inch tapped port, confirm the WPBP variant you order matches that thread size before swapping.
3) What tool do I need to install a Mulberry 30294 plug?
A standard flat-blade screwdriver. The head is slotted, so it drives in and backs out without a hex key or a special plug wrench, which matters when you are closing off a dozen ports on a panel job.
4) Is a die-cast zinc closure plug alright for outdoor or wet-location conduit?
The 30294 body is die-cast zinc, which stands up to normal exterior and industrial conduit work better than plastic, and it is intended to keep dust, debris, moisture and pests out of unused ports. It seals mechanically on the thread, so for a wet location you would still follow whatever sealing practice the enclosure's own rating calls for.
5) What is the Mulberry part number for a 1-inch zinc closure plug?
Order Mulberry 30294. That is the manufacturer part number for the 1-inch gray die-cast zinc round threaded slotted closure plug, and the plug is sold as that single model, not in multiple sizes under one number.
6) I need to close an unused opening that is not threaded - will the Mulberry 30294 work?
No. The Mulberry 30294 is a threaded plug; its round body screws into a matching 1-inch tapped opening, so it needs female threads to seat. For a smooth, unthreaded knockout you need a different style of closure. If the cover itself is a Pass & Seymour weatherproof assembly, the Pass & Seymour WPBP series closure plug is the counterpart to check against the opening you have.
7) Will a gray closure plug look out of place on my panels and conduit fittings?
Gray is the standard color family for conduit bodies, weatherproof covers and enclosures, so the gray finish on the 30294 blends with typical raceway and panel hardware rather than standing out. For property managers standardizing across a building, it keeps a consistent look across openings.
8) Do I need a gasket or sealant with the 30294, or is the plug enough on its own?
Nothing else is included or required for the mechanical closure. The 1-inch threads tighten into the tapped opening to form the seal, and the plug ships as the single piece, no gasket or locknut. If your installation calls for thread sealant or anti-seize on zinc into steel, that is a separate item.
9) Does the Mulberry 30294 plug match the gray finish of a Pass & Seymour weatherproof cover?
Yes. The Mulberry 30294 closure plug is gray, as is the Pass & Seymour WPBP series closure plug, so a 30294 threaded into a gray weatherproof cover or enclosure port reads as a consistent finish across the assembly.
How fast can I get the Mulberry 30294 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Mulberry 30294 come with a warranty?
Absolutely. The Mulberry 30294 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Mulberry 30294?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Mulberry 30294 from ZenSupply?
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