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Aluminium terminal lug with two mounting holes and hex socket head

Thomas & Betts

Thomas & Betts 250Kcmil-6Str Trminl Lug ADR25-21

SKU CH-DST3-5TPXK

Mechanical lug accepts 6 AWG to 250 kcmil stranded copper or aluminum conductors with dual 3/8-inch stud holes

  • Product type250KCMIL-6STR TRMINL LUG
  • Accepts 6 AWG to 250 kcmil copper wire
  • Dual-hole design with 0.81 in spacing for secure mounting
  • Aluminum body rated to 194 °F continuous operation
  • Hex socket head allows reliable torque application
  • Rated for 1,000 V maximum voltage

250 kcmil dual-hole lug

The Thomas & Betts ADR25-21 is a mechanical connector designed for terminating stranded copper or aluminum conductors in industrial and commercial electrical installations. It accepts a wire range from 6 AWG up to 250 kcmil and mounts on a 3/8 inch stud with two bolt holes.

Capacity from 6 AWG to 250 kcmil

The barrel accommodates stranded copper conductors as small as 6 AWG and as large as 250 kcmil, giving installers a single lug for a wide range of feeder and branch-circuit sizes. The dual-hole tongue with 0.81 inch spacing matches standard NEMA drilling, while the hex-socket head allows secure crimping or bolt tightening without specialised tooling.

Rated 194 °F at 1 000 V

The aluminum body is rated for continuous operation up to 194 degrees Fahrenheit and a maximum voltage of 1 000 volts, suitable for most low-voltage distribution panels. The tongue measures 1.56 inches long, 1.64 inches wide and 0.25 inches thick, providing ample contact area for reliable current transfer under normal load conditions.

How it compares

Measured against everything we stock in Wire, Cable & Wiring Supplies, at today’s prices. Recalculated every night.

Price $8.99
Cheaper than about 78% of the 1,610 comparable items (median $25.99).

Specifications

Product
Brand nameThomas & Betts
Product type250KCMIL-6STR TRMINL LUG

Questions about this item

Will the ADR25-21 lug accept the 6 AWG stranded copper cables I already have installed?

Yes, the connector is rated for stranded copper from 6 AWG up to 250 kcmil, so your existing 6 AWG conductors fit within the specified range.

How can I verify the ADR25-21 is properly secured after installation?

Tighten the hex-socket screws until the aluminium body grips each conductor firmly; a correct mechanical connection shows no visible strand deformation and the lug sits flat against the mounting surface.

Does the ADR25-21 come with mounting bolts for the 0.38 in holes, or must I supply them?

The lug itself is the only item supplied; mounting hardware for the two 0.38 in diameter holes on 0.81 in centres is not included and must be purchased separately.

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