Uninsulated 8awg Crimp Terminal- for 3/8" screws & studs - Steinair Inc.
Cambridge Terminal Copper Ring Lug, 6 AWG, 3/8 in. at Tractor Supply Co.
8 Gauge Non-Insulated 3/8 Inch Ring Terminal, 4 Piece
Amazon.com: 10pcs 8 Gauge 8 AWG x 3/8” Pure Copper Cable Lug Terminal Ring Connectors with Dual Wall Adhesive Lined Red + Black Heat Shrink Tubing – by WNI : Industrial & Scientific