Thomas & Betts 4" to 3-1/...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,143.15
$160.41

Thomas & Betts 4" to 3-1/2" Female Reducer - Malleable Iron Conduit Fitting

(No reviews yet) Write a Review

Model: 1258
Selected Model is

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

$1,143.15
$160.41
Adding to cart… The item has been added
Free Shipping on orders over $99
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

Thomas & Betts 4" to 3-1/2" Female Reducer

Professional Malleable Iron Conduit Fitting for Size Transitions

The Thomas & Betts 4" to 3-1/2" Female Reducer provides reliable conduit size transitions in electrical installations. Constructed from durable malleable iron, this professional-grade fitting ensures secure connections when reducing from 4-inch to 3-1/2-inch conduit systems, delivering the trusted quality and performance expected from Thomas & Betts electrical components.

Professional Features & Benefits

  • 4" to 3-1/2" Size Reduction: Enables smooth transitions between different conduit diameters for flexible system design and installation requirements.
  • Malleable Iron Construction: Provides exceptional durability and corrosion resistance for long-lasting performance in demanding electrical environments.
  • Female Threading: Ensures secure, threaded connections that maintain system integrity and prevent loosening over time.
  • Professional Grade Design: Engineered to meet rigorous electrical industry standards for reliable conduit system performance.
  • Versatile Application: Suitable for various electrical installations requiring conduit size transitions in commercial and industrial settings.

Technical Specifications

  • Department: Electrical
  • Material: Malleable Iron
  • Number Of Batteries: 0
  • Product Group: Conduit & Fittings
  • Product Subgroup: Reducers
  • Product Type: Female Reducer

Installation & Operation

  1. Mount the unit in a suitable location with appropriate clearance and access for connections and service.
  2. Connect utility and load conductors following applicable guidelines and the manufacturer's instructions.
  3. Wire generator or power input according to the provided voltage/phase specifications and compatible capacity.
  4. Configure any available load management or control features as supported by the provided specifications.
  5. Test automatic transfer or operational functionality and verify proper performance before placing into service.
  6. Complete final inspection and follow ongoing maintenance practices appropriate to the product category.

Professional Applications

  • Commercial Building Electrical Systems
  • Industrial Facility Conduit Networks
  • Institutional Electrical Installations
  • Multi-Unit Residential Properties
  • Professional Office Buildings
  • Retail and Service Establishments
  • Educational and Healthcare Facilities

Why Choose Thomas & Betts Quality?

Thomas & Betts delivers proven reliability through precision-engineered malleable iron construction that withstands the demands of professional electrical installations. This female reducer maintains the high standards of quality and durability that electrical professionals trust for critical conduit system applications.

Manufacturer Resources

Product Specs

Number Of Batteries:
0
Product Group:
Conduit & Fittings
Product Type:
Female Reducer
Department:
Electrical
Product Subgroup:
Reducers
Product Material:
Malleable Iron

Thomas & Betts 1258 – Frequently Asked Questions

How fast can I get the Thomas & Betts 1258 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 1258 come with a warranty?
Absolutely. The Thomas & Betts 1258 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 1258?
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 1258 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.