Burndy KA31U Aluminum Set Scre...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$5.97
Burndy KA31U Aluminum Set Screw Connector, 1-Hole, 1-Conductor

Burndy KA31U Aluminum Set Screw Connector, 1-Hole, 1-Conductor

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Model: KA31U

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

$5.97
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Burndy KA31U Aluminum Set Screw Connector, 1-Hole, 1-Conductor

The Burndy KA31U is an aluminum universal terminal built for single-conductor, single-hole set screw terminations in commercial and industrial electrical systems. This connector is Al/Cu rated, meaning it can be used with either aluminum or copper conductors, and it accepts a wide conductor range from 6 AWG (Str) up to 350 kcmil. The one-hole terminal pad is sized for a 3/8" stud and is secured to the conductor with a single set screw, eliminating the need for a separate crimping tool. A tin-plated finish is applied over the aluminum body to help maintain a low-resistance, corrosion-resistant connection point over the life of the installation.

Key Features

  • Wide Conductor Range: Accepts 6 AWG (Str) through 350 kcmil conductors, giving electricians a single connector that covers a broad span of wire sizes on one part number.
  • 1-Hole, 1-Conductor Design: Single-hole terminal pad sized for a 3/8" stud, built for one conductor per connector for straightforward, predictable panel and bus terminations.
  • Durable Aluminum Construction: Machined from an aluminum universal terminal body for a lightweight yet rugged connector suited to demanding electrical environments.
  • Al/Cu Rated Versatility: Dual-rated for aluminum and copper conductors, so the same KA31U connector can be stocked and used across mixed-conductor jobs without swapping part numbers.
  • Set Screw Termination: A single set screw secures the conductor mechanically, allowing fast field installation without specialized crimping dies.
  • Tin-Plated Finish: The electro tin-plated surface helps resist corrosion and supports stable, consistent electrical conductivity at the termination point over time.
  • 3/8" Stud Compatibility: The terminal pad is drilled and sized for a 3/8" mounting stud, matching common panel, bus bar, and equipment lug hardware.

Technical Specifications

  • Conductor Range: 6-AWG
  • Plating: Electro Tin Plated

Typical Applications

  • Electrical Panel and Enclosure Terminations
  • Equipment Grounding and Bonding Connections
  • Motor, Transformer, and Switchgear Terminations
  • Panelboard and Bus Bar Wiring
  • Commercial and Industrial Electrical Installations
  • Renovation and New Construction Wiring Projects

Why Burndy?

Burndy has long been a trusted name for mechanical and compression electrical connectors used by professional electricians, and the KA31U reflects that standard with its aluminum universal terminal body, Al/Cu rating, and tin-plated finish. Being dual-rated for aluminum and copper conductors, this connector gives installers flexibility to standardize on a single set screw connector for mixed-conductor terminations. The straightforward 1-hole, 3/8" stud, single set-screw design supports fast, dependable field installation on commercial and industrial electrical work.

Manufacturer Resources

Spec Sheet

Product Specs

list_batch:
BURNDY-20260915
Wire Size:
6-AWG
Plating:
Electro Tin Plated
Product Type:
Mechanical Lug
Product Material:
Aluminum
Department:
Electrical
Product Subgroup:
Lugs & Terminals
Product Group:
Wire Connectors & Terminals

Burndy KA31U – Frequently Asked Questions

1) What wire sizes will the Burndy KA31U set screw connector accept?
The KA31U takes a single conductor from 6 AWG stranded up to 350 kcmil. That span covers most feeder and branch terminations on one part number, so you are not stocking three lugs to cover a panel. One conductor per connector, secured with a single set screw.
2) Can I use the Burndy KA31U on aluminum wire, or is it copper only?
Both. The KA31U is Al/Cu rated, so it lands aluminum or copper conductors without changing part numbers. The body itself is aluminum with an electro tin plating, which is what keeps the aluminum-to-copper contact stable and corrosion resistant at the termination.
3) Do I need a crimping tool to install the Burndy KA31U?
No tooling beyond a hex key or screwdriver for the set screw. The KA31U is a mechanical set screw connector, not a compression lug, so there are no dies to rent or match. That is the main reason electricians reach for it in the field over a crimp barrel, which needs the correct die and a hydraulic or battery tool.
4) Should I use a set screw lug like the KA31U or a compression lug for a panel termination?
Set screw is the faster choice when you are terminating a handful of conductors in a panel or enclosure and do not want to haul a crimper and die set to the job. The KA31U handles 6 AWG stranded through 350 kcmil mechanically. Compression lugs make more sense on high-volume repetitive terminations or where the spec calls out a crimped connection. For mixed aluminum and copper work, the KA31U's Al/Cu rating means one part number covers both.
5) Is one Burndy KA31U enough for a two-conductor termination?
No. The KA31U is a 1-conductor, 1-hole terminal, so you need one connector per conductor. Doubling two wires into a single set screw barrel is not what this connector is built for. For two conductors landing on one pad you want a 2-conductor or 2-barrel terminal instead.
6) Will the KA31U hold up in a damp or corrosive electrical room?
The aluminum body carries an electro tin plating, which is the standard treatment for keeping a low-resistance contact surface and resisting corrosion at the termination point over time. It is the same reason tin plate is specified where aluminum conductors meet copper bus.
7) Is the Burndy KA31U suitable for grounding and bonding connections?
Yes, equipment grounding and bonding terminations are among its listed uses, along with motor, transformer, and switchgear connections and panelboard or bus bar wiring. The Al/Cu rating matters here because grounding electrode and bonding conductors are often copper landing on aluminum gear.
8) What is the exact Burndy part number to order for this aluminum set screw lug?
Order it as Burndy KA31U. That is the full manufacturer part number for the aluminum universal terminal, 1-hole, 1-conductor, 3/8 inch stud, tin plated, and there are no suffixes or finish options to specify.
How fast can I get the Burndy KA31U 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 Burndy KA31U come with a warranty?
Absolutely. The Burndy KA31U 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 Burndy KA31U?
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 Burndy KA31U from ZenSupply?
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