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Wire Twist-On Connectors - Cableorganizer.com
HS Grey Electrical Wire End Connectors Ribbed Caps Bulk 1000 Pack Small Twist-on Wire Connectors Nuts 22-14 AWG,P1 Type Screw Terminals: Amazon.com: Industrial & Scientific
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IDEAL Wire Connectors Multi (25-Pack) in the Wire Connectors department at Lowes.com
158 PC Electrical Wire Caps/Connectors Screw Terminals Electrical DIY Must Have - Walmart.com