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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

  • 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.

Highlights

  • 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

Specifications

BrandThomas & Betts
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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