Thomas & Betts 3 Inch Malleabl...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$83.31
$33.31
Thomas & Betts 148 3 INCH MALLEABLE IRON LOCKNUT

Thomas & Betts 3 Inch Malleable Iron Locknut - Heavy Duty Electrical Hardware

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Model: 148
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$83.31
$33.31
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Thomas & Betts 3 Inch Malleable Iron Locknut

Heavy-Duty Electrical Hardware for Secure Conduit Connections

The Thomas & Betts 3 inch malleable iron locknut delivers reliable securing performance for electrical conduit installations. Constructed from durable malleable iron material, this locknut provides the strength and corrosion resistance needed for professional electrical applications. The 3-inch size accommodates larger conduit runs while maintaining secure connections in both indoor and outdoor installations.

Professional Features & Benefits

  • 3-Inch Size: Accommodates larger conduit diameters for versatile installation applications and heavy-duty electrical runs.
  • Malleable Iron Construction: Provides superior strength and durability compared to standard materials, ensuring long-lasting performance.
  • Locknut Design: Delivers secure fastening that prevents loosening due to vibration or thermal cycling in electrical systems.
  • Corrosion Resistant Material: Malleable iron construction offers enhanced resistance to environmental factors and extended service life.
  • Professional Grade Hardware: Engineered to meet demanding electrical installation requirements with consistent threading and fit.
  • Thomas & Betts Quality: Backed by trusted manufacturing standards for reliable performance in critical electrical applications.

Technical Specifications

  • Department: Electrical
  • Number Of Batteries: 0
  • Product Group: Hardware
  • Product Subgroup: Locknuts
  • Product Type: Locknuts

Professional Applications

  • Commercial Electrical Installations
  • Industrial Conduit Systems
  • Residential Heavy-Duty Wiring
  • Outdoor Electrical Enclosures
  • Municipal Infrastructure Projects
  • Maintenance and Repair Operations
  • Professional Electrical Contracting

Why Choose Thomas & Betts Quality?

Thomas & Betts delivers consistent quality and reliability in electrical hardware solutions. This malleable iron locknut represents the brand's commitment to providing durable, professional-grade components that meet the demanding requirements of electrical installations. Trust Thomas & Betts for dependable performance in your critical electrical applications.

Manufacturer Resources

Product Specs

Number Of Batteries:
0
Product Group:
Conduit & Raceway
Product Type:
Locknut
Department:
Electrical
Product Subgroup:
Conduit Fittings

Thomas & Betts 148 – Frequently Asked Questions

1) Is a malleable iron locknut better than a steel one for outdoor conduit terminations?
Malleable iron is the heavier option and is what the 148 is made from. It takes more wrench torque without deforming the ears than a thin stamped steel locknut, and it holds up better in damp or outdoor enclosure work. For light indoor work on small conduit, a stamped steel locknut is usually all that is used; at 3 inch, where you are tightening against a large bushing or hub, the iron body is the practical choice.
2) What is the Thomas & Betts part number for a 3 inch malleable iron locknut?
Order it as Thomas & Betts 148. That is the 3 inch malleable iron locknut in the line, and it is the number to quote if you are matching an existing bill of material.
3) Do I still need a bushing if I use this 3 inch locknut on a panel?
Yes. The 148 locknut secures the conduit or threaded hub to the box or enclosure wall, but it does not protect the conductors. A 3 inch insulating bushing or insulated throat connector is a separate item and is normally required at the box opening, so plan both into the order.
4) Will this locknut hold up in conduit runs that vibrate or cycle hot and cold?
That is what the locknut design is intended for. The serrated locknut bites against the enclosure wall so the joint resists loosening from vibration and thermal cycling, and the malleable iron body is listed as corrosion resistant for both indoor and outdoor installations.
How fast can I get the Thomas & Betts 148 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 Thomas & Betts 148 come with a warranty?
Absolutely. The Thomas & Betts 148 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 Thomas & Betts 148?
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
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