Aluminum split bolts and set-screw connections that are undersized for the wire you are running will heat up under load, cause intermittent connections, and create a fire hazard or a nuisance trip on a breaker you spent time diagnosing. When you are landing large battery cables, solar array home runs, or high-amperage feeder circuits, the connection point matters as much as the wire itself. 3/4-inch by 3/4-inch copper mechanical lug rated for 8 AWG to 1/0 AWG copper conductors. The copper body with tin plating maintains full conductivity while resisting corrosion in outdoor and battery bank environments. Hex bolt tightening with a proper torque wrench ensures the connection is cold-formed against the wire — not just squeezed, but actually gas-tight. Key Specs Wire range: 8 AWG to 1/0 AWG c Stocked at Crofton Lumber and Akron Lumber.