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Topaz Lighting 711 Steel Sealing Locknut, Conduit Fitting
The Topaz Lighting 711 Steel Sealing Locknut is a steel conduit fitting engineered to secure and seal conduit connections at enclosures, boxes, and equipment housings. Built for durability on the job site, this sealing locknut creates a tight, secure hold that helps guard the connection point against the intrusion of moisture and debris. As part of Topaz Lighting's Conduit & Raceway line, it is available in trade sizes ranging from 1/2" to 4", giving electricians and contractors a dependable fastening fitting sized for a wide range of conduit and raceway installations.
Key Features
- Multiple Trade Sizes: Available in trade sizes ranging from 1/2" to 4" to fit a wide range of conduit and raceway systems.
- Durable Construction: Manufactured in steel for strength and long-term performance in conduit and raceway systems.
- Sealing Design: Functions as a sealing locknut to help secure conduit connections and reduce the intrusion of moisture and contaminants at the fitting point.
- Secure Fastening: Locks conduit fittings firmly to boxes, enclosures, and equipment housings for a stable, professional-grade connection.
- Conduit & Raceway Compatible: Designed as part of a broader conduit body and fitting category for use across electrical raceway installations.
- Professional-Grade Fitting: Suited for electricians and contractors requiring a reliable locknut for everyday conduit fastening tasks across a family of sizes.
Technical Specifications
- Product Type: Locknut
- Material: Steel
- Fitting Style: Sealing Locknut
- Trade Sizes Available: 1/2" - 4"
Typical Applications
- Commercial and Industrial Electrical Installations
- Conduit and Raceway Systems
- Securing Conduit Connections at Boxes and Enclosures
- Renovation and New Construction Electrical Work
- General Conduit Fitting and Fastening Tasks
Why Topaz Lighting?
Topaz Lighting supplies steel conduit fittings built for the demands of everyday electrical work. This sealing locknut reflects that focus, offering electricians and contractors a straightforward, reliable fitting for securing conduit connections across commercial, industrial, and residential raceway systems, available across a full family of trade sizes. Choosing a steel sealing locknut from Topaz Lighting's Conduit & Raceway line helps ensure a dependable connection point for code-compliant electrical installations.
Manufacturer Resources
Spec Sheet
Product Specs
- Department:
- Electrical
- Product Group:
- Conduit & Raceway
- Product Subgroup:
- Conduit Bodies & Fittings
- Product Type:
- Locknut
- Product Material:
- Steel
- Product Size:
- 1/2" - 4"
Topaz Lighting 711 – Frequently Asked Questions
1) What sizes does the Topaz sealing locknut come in for conduit?
Nine trade sizes are offered on the Topaz steel sealing locknut: 1/2, 3/4, 1-1/4, 2, 2-1/2, 3, 3-1/2 and 4 inch, plus the 713 size in the same run. Order by part number, not by description: 711 is the 1/2 inch, 712 the 3/4 inch, 714 the 1-1/4 inch, 716 the 2 inch, 717 the 2-1/2 inch, 718 the 3 inch, 719 the 3-1/2 inch and 720 the 4 inch. Match the locknut size to the trade size of the conduit or connector thread it is going on, not to the knockout diameter in the box.
2) What is the difference between a sealing locknut and a standard conduit locknut?
A standard locknut just clamps the connector or conduit hub to the box wall. A sealing locknut does that and adds a seal at the joint, so the connection resists moisture and debris getting in at the fitting point. Use the sealing type where the enclosure is outdoors, in a wash-down area, in a damp mechanical room, or anywhere you want the knockout closed up tight. On a dry interior branch circuit in a finished space, a plain steel locknut does the same clamping job.
3) Are Topaz sealing locknuts steel or zinc die cast?
Steel. The Topaz sealing locknut is made of steel throughout, which is what you want on larger trade sizes where the nut gets wrenched down hard against a knockout, and on runs where a die cast nut would be the weak point. Steel also keeps the fitting consistent with steel connectors and steel boxes on a commercial or industrial raceway system.
4) Can I use a sealing locknut on the inside of the box, or does it go on the outside?
The sealing side goes where the water is. A sealing locknut is meant to be drawn up against the outside face of the enclosure so the seal closes the gap between the nut and the box wall at the knockout. A plain locknut is what goes on the inside to bite the sheet metal and complete the mechanical hold. If you only run the sealing nut on the inside, you have clamped the fitting but you have not sealed the opening.
5) Do sealing locknuts work with rigid conduit and IMC, or only EMT connectors?
Any threaded hub of the matching trade size works. The nut threads onto the standard conduit thread, so it takes rigid, IMC, threaded hubs on equipment housings, and the threaded ends of EMT connectors alike. What has to match is the trade size, which is why the line runs 1/2 inch through 4 inch across parts 711 to 720.
6) Do I still need a bonding bushing or grounding locknut if I use a sealing locknut?
Yes, they do different jobs. The sealing locknut secures the fitting and closes the joint against moisture and debris; it is not a bonding fitting and does not replace a bonding bushing, bonding locknut, or ground wire where your installation calls for one. Spec the bonding hardware separately as the job requires and use the sealing locknut for the mechanical clamp and the seal.
7) Will a sealing locknut make an enclosure raintight by itself?
No. The seal at the locknut closes that one joint against moisture and debris; it does not make the whole enclosure or the conduit run wet-location rated. For a raintight assembly you still need connectors and an enclosure rated for the location, plus proper drainage on the run. The Topaz steel sealing locknut is the fitting that keeps water out of the knockout, not a substitute for the rest of the wet-location detail.
8) Is the 713 Topaz locknut the 1 inch size?
The 713 sits in sequence between the 712 (3/4 inch) and the 714 (1-1/4 inch) in the Topaz sealing locknut line. Order it by the part number 713 to land in that slot, and confirm the trade size against the connector thread you are joining before it goes on the wall.
9) Can I reuse a sealing locknut when I pull a fitting out during a renovation?
Treat it as a one-time seal. The nut itself is steel and will thread on again, but the sealing element gets compressed against the enclosure wall on the first install and will not close as tightly the second time. On renovation work where you are pulling and re-landing conduit, budget a fresh locknut in the matching trade size, which for these runs from 1/2 inch through 4 inch.
How fast can I get the Topaz Lighting 711 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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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 711 come with a warranty?
Absolutely. The Topaz Lighting 711 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 711?
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