Thomas & Betts Locknut 3/8-Inc...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$52.57
$0.44
Thomas & Betts 140 3/8 INCH LOCKNUT

Thomas & Betts Locknut 3/8-Inch Electrical Hardware

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Model: 140
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$52.57
$0.44
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Thomas & Betts Locknut 3/8-Inch Electrical Hardware

Professional Electrical Hardware Component

The Thomas & Betts Locknut 3/8-Inch delivers reliable electrical hardware performance for professional electrical installations. This locknut provides dependable performance designed for electrical contractors, industrial facilities, and commercial installations, offering the trusted performance and quality that professionals expect from America's established electrical infrastructure manufacturer.

Professional Features & Benefits

Secure Connection Performance

  • 3/8-Inch Threading - Precise threading ensures secure connection and reliable electrical hardware performance
  • Professional Grade Construction - Thomas & Betts quality engineering provides dependable locknut performance for electrical applications
  • Electrical Hardware Reliability - Designed for consistent performance in electrical installations and industrial applications
  • Contractor-Grade Quality - Built to meet the demanding requirements of professional electrical contractors and facility managers

Installation & Application Benefits

  • Professional Installation - Standard 3/8-inch sizing ensures compatibility with electrical hardware systems and professional installations
  • Electrical System Integration - Designed for reliable integration with electrical hardware and conduit systems
  • Industrial Application Performance - Suitable for demanding industrial and commercial electrical installations

Technical Specifications

Size: 3/8-Inch threading, Product Type: Locknuts, Product Group: Hardware, Product Subgroup: Locknuts, Department: Electrical applications, Professional electrical hardware component designed for reliable performance in electrical installations.

Installation & Usage

  1. Verify 3/8-inch thread compatibility with electrical hardware system
  2. Thread locknut onto electrical component or conduit fitting
  3. Hand-tighten to ensure proper seating and alignment
  4. Use appropriate tools to achieve secure final tightening
  5. Verify secure connection and proper electrical hardware installation
  6. Inspect installation for proper threading and secure connection

Professional Applications

Ideal for:

  • Electrical Hardware Systems - Secure connections for electrical hardware and component installations
  • Industrial Electrical Installations - Reliable locknut performance for industrial facility electrical systems
  • Commercial Construction Projects - Professional-grade electrical hardware for commercial building installations
  • Electrical Contractor Applications - Dependable hardware components for professional electrical contractor work
  • Facility Maintenance Operations - Reliable electrical hardware for ongoing facility maintenance and repairs
  • Electrical Infrastructure Projects - Quality hardware components for electrical infrastructure installations
  • Conduit System Integration - Secure connections for conduit and raceway electrical systems
  • Electrical Component Assembly - Professional hardware for electrical component and fitting assembly

Why Choose Thomas & Betts Quality?

Thomas & Betts brings decades of established experience in electrical infrastructure solutions, with a commitment to professional quality standards and trusted reliability for electrical contractors and facility managers. This locknut represents the quality engineering and dependable performance that electrical professionals rely on for critical electrical installations and industrial applications.

Manufacturer Resources

Product Specs

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

Thomas & Betts 140 – Frequently Asked Questions

1) What size conduit or fitting does the Thomas & Betts 140 locknut go on?
The Thomas & Betts 140 locknut is a 3/8 inch locknut, so it threads onto 3/8 inch trade size electrical hardware such as conduit fittings and connectors. On a 3/8 inch connector shank coming through a box wall, this is the nut that pulls it tight against the inside of the enclosure. If your fitting is 1/2 inch trade size, which is the most common size in commercial branch circuit work, this one will not thread on and you need the 1/2 inch locknut instead.
2) What is the manufacturer part number for the Thomas & Betts 3/8 inch locknut?
Order it as Thomas & Betts model 140. That is the manufacturer part number for the 3/8 inch locknut, and it is the identifier a distributor or counter will match on.
3) How many locknuts do I need per 3/8 inch connector going into a box?
Depends on how the connector lands. A 3/8 inch connector with an integral shoulder that seats on the outside of the enclosure takes one locknut on the inside. Where you need to clamp through a knockout from both sides, or where the run is into a panel wall and you want a bonded, mechanically tight joint on both faces, you use two of the 140 locknuts, one each side. Buy per connection accordingly rather than one per fitting.
4) How do you tighten an electrical locknut properly without stripping the fitting?
Thread the 140 on by hand first so it starts square on the 3/8 inch thread, seat it against the enclosure wall, then bring it up with a tool until it is solidly tight. Hand starting is the step people skip, and it is what prevents cross threading on a small 3/8 inch shank. Check the joint is snug and the fitting has not rotated before you pull wire.
How fast can I get the Thomas & Betts 140 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 140 come with a warranty?
Absolutely. The Thomas & Betts 140 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 140?
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 Thomas & Betts 140 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.
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