Product Overview
Cal Test CT2989-0 Solderless 4mm Banana Plug Connector - Black
Condition
New old stock. Unused surplus test lead connector components in clean physical condition. Complete unassembled three-piece set includes black rear strain boot, CE-marked main housing sleeve, and nickel-plated contact pin with dual set screws. Sourced from a government research facility. Photos show the specific unit you will receive.
Same or next business day shipping from our Idaho warehouse. Reliable parts since 1999. Honest pricing, no nonsense.
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Product Overview
Cal Test Electronics CT2989-0 is a 4mm fully sheathed in-line male banana plug connector finished in black. Designed for custom test lead assembly and field repair without soldering, the internal wire barrel accepts bare conductors secured by dual Allen-head set screws. The contact assembly incorporates a flexible lantern spring cage and an insulated safety tip designed for high-voltage test environments requiring standard 4mm sheathed jack compatibility.
Key Features
- 4mm sheathed male banana plug contact with grey insulated tip
- Solderless wire termination using dual Allen-head set screws
- Flexible slip-on rear strain relief boot
- Nickel-plated contact pin with lantern-style spring cage
- Embossed CE mark on outer insulating sleeve
- Compatible with standard shrouded 4mm instrument sockets
Applications
- Assembling custom multimeter test leads, bench patch cords, and meter probes
- Repairing damaged oscilloscope ground leads and laboratory power supply patch cables
- Fabricating specialized test harnesses for prototyping, electronics repair benches, and maker workspaces
Frequently Asked Questions
What tool is required to tighten the set screws?
The dual set screws inside the contact barrel require a standard 1.5 mm hex wrench (Allen key) to secure the wire conductor.
Does this plug require soldering during assembly?
No. The barrel uses mechanical clamping with two Allen set screws to hold the stripped wire firmly in place without solder.
Why buy this connector individually from PartsMine?
Buying counted, individually inspected surplus connectors lets you purchase the exact count needed for a specific bench build or repair job without being forced into bulk distributor minimum packs. More pieces cost less each, and the price-break table on this page shows what each quantity costs. Orders ship for an $8 flat rate, ship free over $28, and depart our Idaho warehouse the same or next business day.
Build a test lead to the exact length the job demands, lock it down with a hex key, and get back to troubleshooting.
