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

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.