Milbank 4.063x4.063x0.5 Steel ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$89.06
$40.34

Milbank 4.063x4.063x0.5 Steel Hole Seal, 3 Inch, ANSI 61 Gray, Gasketed Wing Nut

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Model: A-HS300
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$89.06
$40.34
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Milbank 4.063x4.063x0.5 Steel Hole Seal, 3 Inch, ANSI 61 Gray, Gasketed Wing Nut

Professional-Grade Enclosure Sealing Solution

The Milbank 3 Inch Steel Hole Seal delivers professional-grade enclosure sealing performance for electrical panel and equipment applications. This steel hole seal features gasketed wing nut construction designed for electrical contractors and facility managers, providing the reliable sealing performance and ANSI 61 Gray finish that electrical professionals demand for secure enclosure modifications.

Professional Features & Benefits

Superior Sealing Construction

  • Gasketed Wing Nut Design - Provides secure, weatherproof seal with easy installation and removal capability
  • Steel Construction - Delivers long-lasting durability and corrosion resistance for demanding electrical environments
  • 3 Inch Opening Coverage - Perfectly sized for standard electrical enclosure modifications and cable entry points
  • ANSI 61 Gray Finish - Professional appearance that matches standard electrical equipment color schemes

Installation & Maintenance Benefits

  • Wing Nut Operation - Tool-free installation and adjustment for quick field modifications
  • Rubber Gasket Seal - Creates reliable barrier against moisture, dust, and environmental contaminants
  • Removable Design - Allows for future access and modifications without permanent enclosure damage

Technical Specifications

Dimensions: 4.063 x 4.063 x 0.5 inches, Steel construction with ANSI 61 Gray finish, 3 inch hole coverage, includes rubber gasket and wing nut hardware, designed for enclosure accessory applications with professional-grade sealing performance.

Installation Process

  1. Verify 3 inch hole diameter matches seal specifications for proper fit
  2. Position rubber gasket on interior side of enclosure opening
  3. Insert hole seal through opening from exterior side
  4. Align wing nut assembly with threaded shaft inside enclosure
  5. Hand-tighten wing nut to compress gasket and create weatherproof seal
  6. Verify seal integrity and proper compression around entire perimeter

Professional Applications

Ideal for:

  • Electrical Panel Modifications - Sealing unused knockouts and cable entry points in control panels
  • Equipment Enclosures - Closing temporary openings in motor control centers and switchgear
  • Outdoor Electrical Installations - Weather sealing for exterior electrical equipment and junction boxes
  • Industrial Control Systems - Maintaining enclosure integrity in manufacturing and process control applications
  • Commercial Building Systems - Professional sealing solutions for building electrical distribution equipment
  • Maintenance Operations - Temporary and permanent closure of electrical enclosure openings
  • Code Compliance Projects - Meeting electrical code requirements for enclosure integrity
  • Retrofit Applications - Upgrading existing electrical installations with proper sealing solutions

Steel Construction Advantage

Milbank's steel construction provides superior durability and longevity compared to plastic alternatives, ensuring reliable performance in demanding electrical environments. The ANSI 61 Gray finish offers professional appearance while providing additional corrosion protection for extended service life in commercial and industrial applications.

Why Choose Milbank Quality?

Milbank's commitment to professional-grade electrical accessories ensures reliable sealing performance and compliance with industry standards. This hole seal represents decades of experience in electrical enclosure solutions, providing electrical professionals with the quality and reliability needed for critical infrastructure applications.

Manufacturer Resources

Product Specs

Application:
Enclosure Accessory
Insulation:
None
Knockouts:
FALSE
Material:
Steel
Misc:
Hole Seal and Rubber Gasket
Product Family Code:
HOLBE
Unspsc Number:
39121321
Width:
4.063 IN
Product Type:
Hole Seal
Product Group:
Wiring Accessories
Department:
Electrical
Product Subgroup:
Connectors and Wiring Kits
Product Size:
0.5 x 4.063 x 4.063
Product Length:
0.5 IN
Product Color:
ANSI 61 Gray
Product Height:
4.063 IN

Milbank A-HS300 – Frequently Asked Questions

How fast can I get the Milbank A-HS300 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 Milbank A-HS300 come with a warranty?
Absolutely. The Milbank A-HS300 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 Milbank A-HS300?
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 Milbank A-HS300 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.