Ideal Industries Tubular Screw...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$145.29
$95.29
IDEAL Industries 427 Ultra Heavy Duty-250 KCMIL

Ideal Industries Tubular Screw Terminal #6 to 250 KCMIL 600V Painted Wiring Connector

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Model: 427
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$145.29
$95.29
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Ideal Industries Tubular Screw Terminal #6 to 250 KCMIL

Ultra Heavy-Duty 600V Rated Wiring Connector

The Ideal Industries Tubular Screw Terminal delivers professional-grade electrical connection performance for heavy-duty wiring applications. This painted steel terminal connector features ultra heavy-duty construction designed for electricians, electrical contractors, and industrial professionals, providing the reliable performance and industry-leading quality that electrical professionals demand for high-capacity wire terminations.

Professional Features & Benefits

Heavy-Duty Construction

  • Ultra Heavy-Duty Design - Engineered for maximum durability and long-term reliability in demanding electrical installations
  • Painted Steel Construction - Corrosion-resistant finish provides superior protection against environmental factors and chemical exposure
  • Wide Wire Range Capacity - Accommodates conductors from #6 AWG to 250 KCMIL for versatile installation applications
  • Tubular Screw Design - Provides secure mechanical connection with optimal electrical contact for reliable current carrying capacity

Safety & Code Compliance

  • 600V Voltage Rating - Meets electrical code requirements for commercial and industrial power distribution systems
  • High Temperature Performance - Withstands operating temperatures up to 150°C for extreme environment applications
  • UL Listed Quality - Manufactured to strict safety standards ensuring code compliance and electrical safety

Technical Specifications

Wire Range: #6 AWG to 250 KCMIL, Voltage Rating: 600V, Operating Temperature: Up to 150°C (302°F), Construction: Painted steel with corrosion-resistant finish, Termination Style: Tubular screw connection, Package Quantity: Box of 6 terminals, Product Classification: Wiring Devices - Wiring Accessories

Installation & Setup

  1. Strip conductor insulation to proper length ensuring clean copper exposure for optimal electrical contact
  2. Insert stripped conductor fully into tubular terminal opening ensuring complete wire insertion
  3. Tighten screw connection to manufacturer's recommended torque specification for secure mechanical bond
  4. Verify proper wire seating and connection integrity before energizing circuit
  5. Apply appropriate electrical tape or insulation covering as required by local electrical codes
  6. Test connection with appropriate electrical testing equipment to confirm proper installation

Professional Applications

Ideal for:

  • Industrial Power Distribution - Heavy-duty electrical panels, motor control centers, and industrial machinery connections
  • Commercial Electrical Systems - Building power distribution, electrical service equipment, and commercial panel installations
  • Utility Applications - Power company installations, transformer connections, and electrical utility infrastructure
  • Heavy Equipment Wiring - Construction equipment, mining machinery, and industrial equipment electrical connections
  • Marine and Offshore - Shipboard electrical systems, offshore platform wiring, and marine equipment installations
  • Data Center Infrastructure - Power distribution units, electrical feeds, and critical power system connections
  • Manufacturing Facilities - Production equipment wiring, conveyor systems, and industrial automation connections
  • Emergency Power Systems - Generator connections, backup power systems, and emergency electrical installations

Ultra Heavy-Duty Advantage

Ideal Industries tubular screw terminals provide superior electrical performance through precision-engineered construction and high-temperature materials. The painted steel construction offers exceptional corrosion resistance while maintaining optimal electrical conductivity, ensuring long-term reliability in harsh industrial environments and extreme temperature conditions.

Why Choose Ideal Industries Quality?

Ideal Industries demonstrates unwavering commitment to electrical safety through UL listing, rigorous quality testing, and code compliance engineering. Our tubular screw terminals deliver the reliable performance and safety certifications that electrical professionals require for critical power distribution applications, backed by decades of electrical industry expertise and innovation.

Manufacturer Resources

Product Specs

Product Group:
Wire Connectors & Terminals
Department:
Electrical
Product Subgroup:
Lugs & Terminals
Cat Id:
430
Description:
Tubular Screw, Painted, #6 to 250 kcmil
parent sku:
IDL-427
Item Quantity:
Box of 6
Product Type:
Mechanical Lug

Ideal Industries 427 – Frequently Asked Questions

1) What wire sizes will the Ideal 427 tubular screw connector take?
The Ideal Industries 427 handles conductors from #6 AWG up to 250 kcmil, so it covers everything from a feeder tap up to a service-size conductor. If your run is larger than 250 kcmil, this is the wrong connector.
2) Is the Ideal 427 connector rated 600V for a commercial panel or motor control center?
Yes, it carries a 600V rating, which covers standard commercial and industrial power distribution at 120/208, 277/480 and similar systems. The temperature rating is up to 150 C (302 F), so it is also usable with high temperature conductor insulation.
3) How many connectors come in a box of the Ideal 427?
They ship as a box of 6 terminals. For a three-phase feeder splice you would normally need three (or four with a neutral), so one box covers a single termination point with spares.
4) What is the 427 connector made of, and will it hold up in a damp or corrosive industrial space?
It is painted steel. The paint finish is there for corrosion resistance in industrial and marine type environments rather than clean indoor panel work only.
5) Is a tubular screw terminal the right choice, or should I use a compression lug?
A tubular screw terminal like the 427 is a mechanical connection: strip the conductor, insert it fully into the barrel, and torque the setscrew. No crimp tool or die set is needed, which is why it is common for field splices and panel terminations on #6 through 250 kcmil. A compression lug needs a hydraulic crimper and the matching die, so pick that route only when the spec calls for a crimped termination.
6) Do I need anything else to finish the connection with the Ideal 427?
The 427 is the terminal only. You will need a torque driver or wrench to hit the manufacturer's torque value on the setscrew, and insulating tape or a cover as your local code requires for the exposed connection. Verify wire seating before energizing.
7) Can I use the Ideal 427 on a generator or transformer connection?
Yes, within its limits: up to 250 kcmil conductors and 600V. That fits typical generator feeder terminations, transformer secondary connections, and MCC wiring. Above 600V or above 250 kcmil, specify a different connector.
8) What is the part number for the Ideal ultra heavy duty 250 kcmil screw connector?
Ideal Industries part number 427, described as a tubular screw, painted, #6 to 250 kcmil ultra heavy duty connector.
How fast can I get the Ideal Industries 427 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 Ideal Industries 427 come with a warranty?
Absolutely. The Ideal Industries 427 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 Ideal Industries 427?
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 Ideal Industries 427 from ZenSupply?
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