5/16'' Stud Heavy Duty 4 Gauge Nylon Ring Terminal 25 Pieces - WiringProducts, Ltd. – Wiring Products
Bare Copper Ring Terminal - 4/0 AWG, 5/16" Hole (5 Pack)
Amazon.com: 10 pcs WNI 4 Gauge x 5/16 Pure Copper Battery Welding Cable Lug Connector Ring Terminals : Electronics
BLACK PRO SERIES RING TERMINAL 1/0 GAUGE INPUT TO 5/16" BULK PACK – Stinger Electronics
Amazon.com: 10pcs 4 Gauge 4 AWG x 5/16” Pure Copper Cable Lug Terminal Ring Connectors with Dual Wall Adhesive Lined Red + Black Heat Shrink Tubing – by WNI : Industrial & Scientific
4 Gauge (AWG) Pure Copper Cable Lug Connector Ring Terminals – Windy Nation Inc
1000) Non-Insulated 4 AWG Gauge Ring Connector 5/16" Stud Electrical Wire Terminal - USA - Walmart.com