Stackable Test Plugs 4mm – Black Safety Banana Plugs

These 4mm Black Stackable Test Plugs are high‑quality, safety‑sheathed banana plugs designed for constructing custom test leads and electrical connections. Robust, reliable, and easy to assemble, they are ideal for use in school science laboratories, electronics teaching, and general educational test applications.

Each plug features a solder termination, allowing secure attachment of cables when building bespoke test leads. A rigid insulating sleeve fully sheaths the connector, helping to reduce the risk of accidental contact with conductive parts during experiments and demonstrations.

The stackable design enables multiple connections to be made from a single socket, supporting flexible circuit construction and efficient use of laboratory equipment. Finished in black, these test plugs are ideal for colour‑coded circuit work and clear identification of connections.

Key Features

• 4mm stackable banana test plugs
• Safety‑sheathed design with rigid insulating sleeve
• Solder termination for secure, custom cable assembly
• Stackable connection for versatile circuit building
• Finished in black for colour‑coded wiring
• Durable construction for educational and laboratory use
• Compatible with standard 4mm sockets

Ideal for School Science & Electronics Lessons

Well suited to KS3, GCSE, and A‑Level physics and electronics lessons, these 4mm stackable test plugs support safe and flexible investigation of electrical circuits. They help students develop practical skills while maintaining good laboratory safety standards.

• Building custom test leads for experiments
• Constructing and modifying electrical circuits
• Supporting investigations into current, voltage, and resistance
• Encouraging safe use of colour‑coded connections
• Ideal for use with power supplies, meters, and circuit boards

Reliable, adaptable, and safety‑focused, these 4mm Black Stackable Test Plugs are an essential component for hands‑on electrical experimentation and effective science teaching.