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Topaz Lighting Steel Rigid Conduit Locknut
The Topaz Lighting Steel Rigid Conduit Locknut is a Steel locknut engineered to secure Rigid/IMC conduit fittings to enclosures, boxes, and panels in electrical raceway systems, available in trade sizes ranging from 3/4" to 3" to match your conduit run. Classified under Conduit & Raceway / Conduit Bodies & Fittings, this locknut is a fundamental component for creating a mechanically sound, code-compliant conduit connection. Its Steel construction provides the strength and durability required for demanding commercial and industrial electrical installations, and each locknut ships 100 to a pack for consistent job-site stocking.
Key Features
- Trade Size Range: Available in 3/4" through 3" to fit a wide range of Rigid conduit and enclosure applications.
- Durable Construction: Steel material provides long-term mechanical strength and reliable performance in conduit raceway applications.
- Rigid/IMC Conduit Compatibility: Designed to secure Rigid and IMC conduit connections to enclosures, panels, and boxes.
- Locknut Function: Provides a secure mechanical lock at the point where conduit enters an enclosure, helping maintain raceway integrity.
- Conduit Bodies & Fittings Category: Part of the Conduit & Raceway product group, engineered to complement other Topaz Lighting conduit fittings.
- Professional-Grade Design: Suited for use by licensed electricians and contractors on commercial and industrial projects.
- Job-Site Packaging: Packed 100 per box for efficient stocking on commercial and industrial jobs.
Technical Specifications
- Conduit Type: Rigid/IMC
- Pack Size: 100
- Trade Sizes Available: 3/4", 1-1/4", 2", 2-1/2", 3"
Typical Applications
- Commercial and Industrial Electrical Installations
- Conduit and Raceway Systems
- Panelboard and Enclosure Wiring Connections
- Renovation and New Construction Projects
- Rigid Conduit Fitting Assemblies
Why Topaz Lighting?
Topaz Lighting builds Steel locknuts for professionals who need dependable, code-compliant components for conduit and raceway systems, offered across trade sizes from 3/4" to 3" to cover a full range of Rigid/IMC installations. This Rigid Conduit Locknut reflects that focus on durable materials and straightforward, functional design for demanding electrical work. Choosing Topaz Lighting components for your conduit assemblies helps ensure consistent, reliable connections across your electrical installation.
Manufacturer Resources
Spec Sheet
Product Specs
- Department:
- Electrical
- Product Group:
- Conduit & Raceway
- Product Subgroup:
- Conduit Bodies & Fittings
- Product Type:
- Locknut
- Conduit Type:
- Rigid/IMC
- Product Material:
- Steel
- Pack size (unit):
- 100
- Product Size:
- 3/4" - 3"
Topaz Lighting TOP-282 – Frequently Asked Questions
1) Will this locknut work on EMT, or is it only for rigid conduit?
It is built for Rigid and IMC conduit connections into enclosures, boxes and panels. EMT is not a threaded raceway, so it terminates with a set screw or compression connector and the connector's own hub nut, not a rigid conduit locknut. If your run is EMT, order EMT connectors instead; if it is threaded rigid or IMC, this is the right nut.
2) Do I need one locknut or two per conduit entry into a box?
That depends on how the conduit lands. A threaded rigid or IMC nipple passing through a knockout is usually made up with a nut on each side of the enclosure wall, so budget two of these per entry. A conduit fitting with an integral hub that seats on the outside takes one nut on the inside. Topaz sells these 100 to a box, so count entries first, then double the number where you are using a nipple through a knockout.
3) Does a steel locknut alone give me a proper termination at the panel, or do I need a bushing too?
The locknut does the mechanical job, clamping the threaded rigid or IMC connection tight at the enclosure wall. It does not protect the conductors from the cut thread ends inside the box. On larger trade sizes you will normally add an insulating or grounding bushing on the inside of the enclosure to cover the conduit end. Order the bushing in the same trade size as the nut, 3/4 inch through 3 inch here.
4) How many locknuts come in a box from Topaz?
Each size ships 100 to a box. For a panel changeout or a large industrial raceway job that quantity covers a lot of terminations at once, and it means you are buying by the box rather than by the piece, so pick the trade size carefully before ordering.
5) Are these Topaz conduit locknuts steel or zinc die cast?
Steel. That matters on commercial and industrial work where the nut gets torqued hard against a panel wall and where a die cast nut can crack on a big trade size. Steel also bites into the enclosure metal at the tang, which is what keeps the raceway mechanically and electrically continuous at the box.
6) Will a 2 inch Topaz locknut thread onto IMC, or is IMC a different thread?
It will. Rigid and IMC share the same NPT-style conduit thread at a given trade size, which is why this nut is listed for both. A 2 inch nut (part 286) makes up on 2 inch rigid or 2 inch IMC without any adapter.
7) Can I use these on a renovation where I am reworking an existing panelboard?
Yes, that is a standard use. The same steel nut serves new construction feeders and retrofit work at an existing panelboard or enclosure, as long as the raceway is threaded rigid or IMC and the trade size falls between 3/4 inch and 3 inch. On older gear, check the existing thread condition before you order a full box.
How fast can I get the Topaz Lighting TOP-282 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-282 come with a warranty?
Absolutely. The Topaz Lighting TOP-282 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-282?
You can call, text, or email our expert support team for fast answers. We’re here to help with
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selection,
installation tips, and troubleshooting. Contact Us
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