https://www.3m.com/3M/en_US/p/c/electrical/crimp-terminals/ring/i/energy/electrical-construction-and-maintenance/
Common electrical connectors which have a round tongue with a center opening for connection to a stud and are crimped to wire with a compression tool.
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https://www.panduit.com/latam/en/products/wire-termination/terminals-terminal-kits/ring-terminals.html
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