Arlington Industries Steel Con...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$0.19
Arlington Industries Steel Conduit Locknut, Threaded Raceway Fitting

Arlington Industries Steel Conduit Locknut, Threaded Raceway Fitting

(No reviews yet) Write a Review

Model: ARL401

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

$0.19
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 Steel Conduit Locknut

The Arlington Industries Steel Conduit Locknut is a durable steel fitting used to secure conduit to enclosures, boxes, and panels. This locknut family is available in sizes ranging from 1/2" through 1-1/2" trade size, giving electricians and panel shops a dependable option for matching virtually any standard conduit or knockout dimension on the job. Designed for straightforward installation, each locknut threads onto conduit and cinches down against the wall of a knockout to create a mechanically sound, code-compliant connection point. As a foundational fitting in any electrical raceway system, the Arlington Industries steel locknut is a staple item for electricians, panel shops, and contractors who need dependable, no-frills hardware for everyday conduit terminations across a range of job requirements.

Key Features

  • Trade Size Range: Available from 1/2" through 1-1/2" to match standard conduit and knockout dimensions for a precise, secure fit across common raceway sizes.
  • Durable Construction: Steel material provides the strength and rigidity needed to maintain a tight mechanical bond between conduit and enclosure over the life of the installation.
  • Locknut Design: Threaded construction allows the locknut to be tightened firmly against the inside wall of a box or enclosure, locking conduit in place and preventing loosening from vibration or movement.
  • Simple Field Installation: Hand- or wrench-tightened onto threaded conduit ends, making it fast to install on new construction or retrofit jobs alike.
  • Versatile Application: Compatible with a wide range of standard conduit and box configurations commonly found in residential, commercial, and industrial electrical work.
  • Sizing Flexibility: With options spanning 1/2" to 1-1/2" trade size, this locknut family lets contractors stock a single reliable line for multiple raceway diameters.

Technical Specifications

  • Trade Size: 1/2" - 1-1/2"
  • Material: Steel
  • Product Type: Conduit Locknut

Typical Applications

  • Commercial and Industrial Electrical Installations
  • Conduit and Raceway Systems
  • Panelboard and Junction Box Terminations
  • Residential and New Construction Wiring
  • Electrical Renovation and Retrofit Projects

Why Arlington Industries?

Arlington Industries builds electrical fittings like the steel locknut with the durable materials and precise sizing that installers rely on for secure, long-lasting conduit connections. Available across a full range of trade sizes from 1/2" to 1-1/2", this steel locknut delivers the straightforward, reliable performance electricians expect from a core raceway component, making it an easy choice for stocking trucks and panel shops alike. Choose Arlington Industries for consistent quality on the fittings that hold your electrical systems together.

Manufacturer Resources

Product Specs

Product Type:
Locknut
Department:
Electrical
Product Group:
Conduit & Raceway
Product Subgroup:
Conduit Fittings
list_batch:
ARL-20260929
Product Material:
Steel
Product Color:
Silver

Arlington Industries ARL401 – Frequently Asked Questions

1) What sizes does the Arlington steel conduit locknut come in?
Two orderable trade sizes: 1/2 inch (part 401) and 1-1/2 inch (part 405). The locknut family spans 1/2 inch through 1-1/2 inch trade size, so match the locknut to the conduit thread and knockout you are terminating into.
2) Will a 1/2 inch locknut fit a 1/2 inch EMT connector or rigid conduit thread?
Yes. Conduit locknuts are sized by trade size, not by an actual thread diameter, so the 1/2 inch locknut (part 401) threads onto any standard 1/2 inch trade size threaded fitting or conduit end and cinches against the inside wall of a 1/2 inch knockout. Same logic for the 1-1/2 inch version, part 405.
3) Is this locknut steel or zinc die cast?
Steel. That gives it the rigidity to hold a tight mechanical bond between the conduit thread and the enclosure wall without deforming when it is wrenched down.
4) Do I need one locknut or two per conduit termination?
That depends on the connection. A threaded rigid or IMC conduit entering a knockout is typically double locknutted, one outside and one inside the enclosure, with a bushing on the inside end; a factory EMT connector with an integral shoulder needs only the single inside locknut. The Arlington steel locknut is sold per size (401 for 1/2 inch, 405 for 1-1/2 inch), so order the count your method requires.
5) Does the locknut come with a bushing or sealing washer?
No. This is the locknut only, a single threaded steel nut. If your termination calls for an insulating bushing on the conduit end or a sealing washer for a wet or outdoor enclosure, those are separate items you order alongside it.
6) Can I use these locknuts in an industrial panel shop as well as residential work?
Yes. The steel locknut is used on panelboard and junction box terminations, conduit and raceway runs, new residential construction and retrofit work alike, which is why panel shops and electricians stock both the 1/2 inch and 1-1/2 inch sizes on the shelf.
7) Will a locknut hold up if the conduit run vibrates?
The threaded design lets you draw the nut firmly against the inside wall of the box or enclosure, which locks the conduit in place and resists loosening from vibration or movement. Steel construction is what keeps that bond tight over the life of the install rather than crushing or backing off.
How fast can I get the Arlington Industries ARL401 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 ARL401 come with a warranty?
Absolutely. The Arlington Industries ARL401 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 ARL401?
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 ARL401 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.
!