Utilitech Grounding Wire Connectors Metal (8-Pack) in the Wire Connectors department at Lowes.com
Amazon.com: JEGS Alternator Ground Wire | 10-Gauge | Made In USA | Includes (1) Wire 10 ga. x 24" Long, (1) Ring Terminal #10, (1) Ring Terminal 5/16", (1) Ring Terminal 3/8", (1) Grounding Tab with Screw : Automotive
Southwire 5/8 in. Grounding Rod or 1/2 in. Rebar Ground Rod Clamp for #10 SOL/STR - #2 STR Wire 65176440 - The Home Depot
Ideal Industries 30-292 Polypropylene Grounding Wire Connector Green 14-10-AWG 500 Per Bag Wing-Nut® Greenie® 92® | HZ Electric Supply