Topaz Lighting 278 Heavy Squar...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$7.60
Topaz Lighting 278 Heavy Square Steel Fixture Locknut

Topaz Lighting 278 Heavy Square Steel Fixture Locknut

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Model: TOP-279

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

$7.60
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Topaz Lighting 278 Heavy Square Steel Fixture Locknut

The Topaz Lighting 278 Heavy Square Steel Fixture Locknut is a solid steel locknut engineered to securely fasten stem fixtures and threaded conduit in professional electrical installations. Constructed entirely from solid steel, this locknut delivers excellent corrosion protection while ensuring a lasting, reliable connection on the job site. Its heavy square profile delivers superior grip and torque, while the threaded connection method ensures a firm, vibration-resistant hold on the fixture or conduit run. This family of locknuts is available in 1/8" and 1/4" trade sizes, giving electricians the flexibility to match the fastener to the application, and ships 100 per pack for efficient job-site stocking and inventory management.

Key Features

  • Trade Size Range: Available in 1/8" and 1/4" sizes to fit a variety of stem fixture and threaded conduit applications.
  • Durable Construction: Solid steel body provides exceptional strength and excellent corrosion protection for long-lasting performance in demanding electrical environments.
  • Heavy Square Design: Heavy square profile delivers superior grip and torque when securing stem fixtures and threaded conduit, making installation easier for electricians in the field.
  • Secure Fastening: Threaded connection method ensures a firm, vibration-resistant hold on stem fixtures and threaded conduit applications, reducing the chance of loosening over time.
  • Reduced Downtime: Solid steel construction creates a lasting connection, minimizing the need for rework and maintenance over the product's service life.
  • Versatile Compatibility: Suitable for use with stem fixtures and threaded conduit across a wide range of commercial and residential electrical installations.
  • Convenient Packaging: Supplied 100 per pack, streamlining ordering and stocking for contractors and electrical distributors.

Technical Specifications

  • Pack Size: 100

Typical Applications

  • Securing stem fixtures in commercial and residential lighting installations
  • Fastening threaded conduit in electrical raceway systems
  • New construction and renovation electrical projects
  • Industrial and commercial electrical installations requiring reliable conduit connections
  • Panelboard and load center conduit entry fastening

Why Topaz Lighting?

Topaz Lighting's Heavy Square Steel Fixture Locknuts are built from solid steel, ensuring excellent corrosion protection and a lasting connection in demanding electrical environments. Their heavy square profile and threaded connection method support code-compliant, vibration-resistant performance trusted by professional electricians and contractors on both new construction and renovation projects. Offered in 1/8" and 1/4" sizes and packed 100 per box, these locknuts give contractors a dependable, ready-to-stock solution. When reliability and safety matter, Topaz Lighting delivers the dependability needed to get the job done right the first time.

Product Specs

Product Type:
Locknut
Connection Type:
Threaded
Department:
Electrical
Product Group:
Conduit & Raceway
Product Subgroup:
Conduit Bodies & Fittings
Product Material:
Steel
Pack size (unit):
100
Configuration:
Heavy Square
Product Size:
1/8" - 1/4"

Topaz Lighting TOP-279 – Frequently Asked Questions

1) What sizes does the Topaz 278 heavy square fixture locknut come in, and which part number is which?
Two trade sizes. The 1/8 inch locknut is part number 278 and the 1/4 inch is part number 279. Both are the same heavy square steel body, just threaded for the different stem size, so order by the thread on the fixture stem or nipple you are securing.
2) Why choose a heavy square locknut over a standard thin locknut for a stem-hung fixture?
The square profile gives you flats to grab with a wrench, so you can pull the joint tighter than you can with a thin stamped ring nut, and the heavier body resists loosening from vibration on a pendant or stem drop. On a hung fixture where the nut is carrying and holding alignment, that extra grip and torque is the reason to spec the heavy square version.
3) Can I use these locknuts on a conduit entry into a panelboard?
Yes, where the threaded entry matches the 1/8 or 1/4 inch size. Panelboard and load center conduit entry fastening is listed among the intended applications for the Topaz heavy square steel locknut, along with new construction and renovation raceway work. For larger conduit trade sizes at a panel knockout you need a locknut sized to that conduit instead.
4) Does the Topaz 278 locknut thread on, or does it need a set screw?
It threads on. The connection method is threaded, so it simply spins onto the matching 1/8 or 1/4 inch fixture stem or threaded conduit and tightens against the fixture canopy, box, or hub. No set screw, no separate hardware.
How fast can I get the Topaz Lighting TOP-279 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 Topaz Lighting TOP-279 come with a warranty?
Absolutely. The Topaz Lighting TOP-279 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 Topaz Lighting TOP-279?
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 Topaz Lighting TOP-279 from ZenSupply?
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