DJ221 4.0 1Pin auto plug and socket set - 4.0 mm connector and socket, 1Pin design, auto plug and terminal plug for automotive and electric motorcycles - Pack includes 50 pieces per set for easy replacement and stocking - Brass core with tin coating for good electrical conductivity and reliable performance - Connector and socket size: 4.0 mm, compatible with matching 4.0 mm parts - Primary application: automotive field, with a focus on lighting systems - Functions as a durable means to establish electrical connections in automotive and motorcycle electrical systems Key benefits - Reliable conductivity: brass with tin coating provides solid electrical performance and resistance to corrosion - Easy installation: 4.0 mm connection size and 1Pin design support straightforward assembly with compatible parts - Practical quantity: set of 50 pieces ensures availability for multiple connections or replacements - Versatile use: suitable for automotive lighting wiring and other low to medium current connections in vehicles Use scenarios - Replacing damaged or worn connectors in a car or motorcycle lighting harness to restore headlight, taillight, or indicator circuits - Installing aftermarket lighting or accessories by creating secure 4.0 mm connections within the vehicle wiring system - Building or repairing a temporary or semi-permanent wiring harness for automotive electrical projects, especially where 4.0 mm connectors are specified