Arlington Industries Plated St...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$323.39
Arlington Industries Plated Steel Conduit Locknuts for Rigid and IMC Fittings - Silver Finish, 100 Pack

Arlington Industries Plated Steel Conduit Locknuts for Rigid and IMC Fittings - Silver Finish, 100 Pack

(No reviews yet) Write a Review

Model: 406

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

$323.39
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Arlington Industries Plated Steel Conduit Locknuts for Rigid and IMC Fittings

Professional quality hardware for secure conduit connections

Arlington Industries Plated Steel Conduit Locknuts provide reliable securing solutions for rigid and IMC conduit fittings. These professional-grade locknuts feature durable plated steel construction with silver finish, ensuring long-lasting performance in electrical installations where secure conduit connections are essential.

Professional Features & Benefits

  • Plated Steel Construction: Delivers superior durability and corrosion resistance for long-term reliability in demanding electrical applications.
  • Silver Finish: Provides professional appearance and enhanced protection against environmental factors.
  • Rigid and IMC Compatibility: Engineered specifically for use with rigid and intermediate metallic conduit fittings for versatile installation options.
  • Secure Locking Action: Ensures tight, reliable connections that maintain electrical continuity and mechanical integrity.
  • Professional Grade Quality: Arlington Industries manufacturing standards deliver consistent performance for commercial and industrial applications.

Technical Specifications

  • Color: Silver
  • Material S: Plated Steel

Professional Applications

  • Commercial Electrical Installations
  • Industrial Conduit Systems
  • Institutional Facilities
  • Multi-Unit Properties
  • Professional Offices
  • Retail Establishments
  • Light Industrial Applications

Why Choose Arlington Industries Quality?

Arlington Industries delivers trusted reliability through precision-engineered electrical hardware solutions. The plated steel construction and silver finish ensure professional performance and durability in demanding electrical applications, providing the quality and consistency professionals depend on for critical conduit connections.

Manufacturer Resources

Product Specs

Department:
Electrical
Product Type:
Rigid/IMC Fitting
Product Category:
Conduit Fittings
Product Color:
Silver
Product Material:
Plated Steel
Product Group:
Conduit Fittings
Product Subgroup:
Electrical

Arlington Industries 406 – Frequently Asked Questions

1) What trade sizes do Arlington plated steel conduit locknuts come in?
Arlington's plated steel conduit locknuts are offered in six trade sizes: 3/4 inch (part 402), 1 inch (403), 1-1/4 inch (404), 2 inch (406), 2-1/2 inch (407), and 3 inch (408). Order by the trade size of the conduit or fitting thread you are locking down, not by the knockout diameter.
2) Will these locknuts thread onto EMT connectors, or only rigid and IMC?
These are built for rigid and intermediate metallic conduit fittings. That matters because rigid and IMC use NPT tapered pipe thread, while EMT connectors and couplings are threadless compression or set-screw bodies whose hubs take a locknut of the same trade size. If your fitting has a male threaded hub, match the trade size and the nut seats; if you are working with raw EMT tubing, there is no thread to take a locknut at all.
3) Do these locknuts bite into the box to maintain the ground path, or do I still need a bonding bushing?
A steel locknut's serrations dig into the enclosure wall to hold the connection tight and carry continuity through the metal-to-metal joint, which is what a standard locknut is expected to do on ordinary circuits. It is not a substitute for a bonding locknut or grounding bushing where those are specifically required, such as on service-entrance conduit or where concentric or eccentric knockouts are involved. For those entries, order a listed bonding bushing in the same trade size.
4) Do I need one locknut or two per conduit entry into a box?
Standard practice on a rigid or IMC run into a sheet metal enclosure is two: one on the outside of the box wall and one inside, tightened against each other so the conduit is locked mechanically and bonded through the box wall. If the fitting has a shoulder that bears on the outside and you are entering a threaded hub, one nut on the inside is typical. Buy the count accordingly, since these ship in bulk packs of 100.
5) Are these steel locknuts okay for a damp or corrosive environment like a parking garage or wash-down area?
Plated steel with a silver finish gives corrosion resistance suitable for general commercial and light industrial work, including garages and unconditioned spaces. For genuinely wet or chemically aggressive locations, an electrician would normally step up to a PVC-coated or stainless assembly rather than rely on plating alone. Plated steel is the standard choice for dry and damp interior conduit runs.
6) For a large commercial job, is it better to stock locknuts in bulk by size or buy per fitting?
Bulk is how electrical contractors and MRO storerooms normally carry these. They ship 100 to a pack by trade size, so a crew stocking 3/4 inch (402) and 1 inch (403) covers the bulk of branch circuit conduit entries, with 2 inch (406) through 3 inch (408) pulled for feeder and riser work. Standardizing on one manufacturer across sizes keeps the thread quality and plating consistent across the whole install.
7) Are these the same as the locknuts that come packed with a conduit connector?
Functionally the same part, bought loose in quantity. Connectors usually ship with a single nut, which leaves you short whenever a job calls for a nut inside and out, or when a nut is lost on site. These plated steel nuts in matching trade sizes cover those gaps without opening a new connector box.
How fast can I get the Arlington Industries 406 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 Arlington Industries 406 come with a warranty?
Absolutely. The Arlington Industries 406 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 Arlington Industries 406?
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 Arlington Industries 406 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.
!