We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in

Thomas & Betts

Thomas & Betts Blackburn ADR21-21 Mechanical Lug 2/0 AWG 2 Conductor 1/4 in

SKU CH-RZDS-5QECR

Connects two conductors up to 2/0 AWG with a 1/4 in stud hole and 1,000 V rating

  • TypeElectrical Connectors
  • Accommodates two conductors for parallel runs
  • 2/0 AWG maximum stranded copper capacity
  • Slotted head enables standard screwdriver installation
  • Aluminium body rated to 194 °F
  • Dual 1/4 in holes on 0.66 in centres

Electrical connector for aluminium and copper

The Blackburn ADR21-21 mechanical lug accepts stranded copper conductors from 14 AWG up to 2/0 AWG and is also rated for aluminium wire. Its aluminium body provides a single termination point with two conductors secured by slotted set screws. The connector mounts on a 1/4 in stud using two holes spaced 0.66 in apart.

Sustained current handling within temperature limit

The lug carries a maximum voltage rating of 1,000 V and a maximum operating temperature of 194 degrees F. Under continuous load the aluminium body and plated hardware maintain contact integrity without exceeding this thermal ceiling. Proper torque on the slotted screws ensures low resistance across both conductors during extended operation.

Verify stud size and hole spacing before ordering

Confirm that the mounting surface uses a 1/4 in stud with two holes at 0.66 in centres to match the lug pattern. The tongue measures 0.84 in long, 1.25 in wide and 0.19 in thick, so check available clearance. Ensure the conductor range covers your wire gauge and that the single-hole termination suits your circuit design.

Highlights

  • Accommodates two conductors for parallel runs
  • 2/0 AWG maximum stranded copper capacity
  • Slotted head enables standard screwdriver installation
  • Aluminium body rated to 194 °F
  • Dual 1/4 in holes on 0.66 in centres

Specifications

BrandBLACKBURN
TypeElectrical Connectors

Questions about this item

How hot does the ADR21-21 lug get under continuous full-load operation?

The lug is rated for a maximum operating temperature of 194 degrees F, so it will not exceed that limit when properly installed and torqued.

What wire sizes and tools are required to terminate both conductors in this lug?

Each conductor must be stranded copper between 14 AWG and 2/0 AWG, and a slotted screwdriver is needed to secure the set screws.

Will the 0.66 in hole spacing on this lug match the 1/4 in studs on my existing bus bar?

Yes, the lug has two holes of 0.25 in diameter spaced 0.66 in apart, designed for 1/4 in studs on standard bus bars.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.